The best 4 channel amp for sound quality will depend on your needs. If you are just looking to power a small set of speakers, then it may not be necessary to spend so much money on an amplifier. A cheaper model with lower wattage might suffice.

However, if you have larger speaker systems or want the highest sound quality possible, then it would be prudent to invest in a more expensive four-channel amplifier that is both powerful and high fidelity. There are many brands out there that offer top-rated car amps for sale at affordable prices. Let’s take a look at some of them!

👉Tips for Upgrading Your Car’s Audio System with an Amplifier. A Step-by-Step Guide


Crunch SA-1100.4


  • 4-Channel
  • Class AB
  • LxWxH: 14.17 x 8.26 x 4.13 inch
  • Crossover
  • dual stereo bridged

BOSS Audio Systems OX4.400


  • 4 Channel
  • 1600 Watts
  • Class A/B
  • 2-8 Ohm Stable
  • MOSFET Power Supply



  • LxWxH: 14.43 x 7.5 x 4 inch
  • Surface Mount
  • Channels: 4
  • Surface Mount PCB
  • Small Foot Print Design


Before we get into the best 4-channel amp for sound quality, let’s take a moment to think about what you need an amplifier for. If you simply want to add some extra power to your car speakers then using a head unit (or HU) and having it set on high may be all that is needed.

However, if you are looking to add an amplifier just so you can take advantage of the crossover features, then you should understand that your head unit is not powerful enough to run high-end speakers. Just like in-home theater audio equipment, there are amps at low prices (head units) and high prices (amplifiers).

If you plan on using this amplifier to power more than one set of speakers, then it is most likely that you need to invest in a four-channel amplifier for sound quality. If this is your case, then read on and we will talk about the best 4 channel amps for sound quality.


There are several types of car amps you can get. The most popular ones are four-channel amps (quad-amps) which power four speakers at the same time. There are also two-channel amps (dual-amps), three-channel amps (triple-amps), 5 channel amps, and 8 channel amps. If this is your first time buying one, then we recommend going with a 4-channel amplifier for sound quality.

Four-channel car amps power at least four speakers and can handle anything from an entry level system up to the most powerful high end audio systems. This is because they provide more options and flexibility than any other type of amp. You could hook up one subwoofer on the low-end of the frequency spectrum and high-end components like tweeters, etc. on the other end. This way, you can adjust each speaker’s range so that it doesn’t overlap with another specific speaker’s frequencies.

You could even connect all your door speakers to one channel, rear deck speakers to another, and perhaps a subwoofer on another. This way, you can set the gain (the amplifier’s volume) of each individual speaker so that you only get the most out of your system instead of blasting it all at once which is likely to cause damage.


4 channel amplifiers were designed to physically accept up to four speaker channels and physically provide two (2) separate lower voltage pre-amp signal connections. These separate connections are intended to power a pair of high frequency speakers, such as tweeters or other small high performance speakers.

While it is possible to wire the outputs from a 4 channel amplifier as a 2 channel amplifier, just as it is possible to wire the outputs from a 2 channel amplifier as a 4 channel amplifier, do not expect the resulting installation to perform as either would be expected.


Basically, all 4 channel amps are the same when it comes to powering your speakers. However, they vary in terms of features and size.

High-end models have the best sound quality but also require more installation time and cost a lot more money. Entry level models provide decent sound quality for a much lower price tag which is why we recommend them if you are on a budget.

Also Read: 12 Best Car Amplifiers for Bass 2023 | CarElectronix


There are 4 classes of amplifiers:

Class A/B amps – these models provide the most power and sound quality, but also cost more. They usually have a higher price tag than Class D models with similar wattage.

Class D amps – these models use efficient digital switching circuitry to produce high-end power in a compact package at a low price. They require less installation time and can be mounted in tight spaces because they tend to be compact and lightweight compared to all other types of car amps. However, they do not offer the best sound quality (even though it is decent).

Class AB amps – like Class A/B amps, this type provides excellent sound quality but at a lower wattage (lower driving power) than Class A/B amps. They also cost less than Class A/B models with the same wattage.

Class G/H amps – these amps provide a very high quality sound, but they are expensive and require more installation time because they use complicated circuitry.

Also Read »> How to Choose an Amplifier for Car Speakers Step by Step Guide


  1. Best 4 channel amp for mids and highs- Rockford Fosgate R300X4 Prime

  2. Best 4 channel Class A/B amplifier- MTX Audio THUNDER75.4 Thunder Series

  3. Best Compact 4 Channel Digital Amplifier- Kenwood KAC-M3004 Compact

  4. Best 4 Channel Car Amplifier under 200$- Alpine MRV-F300]

  5. Best 4-channel amp that won’t break the bank- KICKER DXA 250.4 250 Watt Full Range

  6. Best Compact 4 Channel Amp- Audiopipe APMI-4095 Class AB 1300 Watt Compact

  7. Best Boss 4 Channel Car Amplifier- BOSS Audio OX4.400

  8. Best Dyno-Certified 4 Channel Car Amp- Rockville RVF-2 1200w Peak/300w

  9. Best Cheap 4 Channel Car Amplifier- Planet Audio AC800.4

  10. Best budget 4 channel amp- Crunch SA-1100.4 Smash Series

«Our Product Review Process»



Rockford Fosgate Prime amplifiers are designed for those who want big power from a small footprint. The R300X4 is a 4-channel amplifier that can deliver up to 75 watts x 4 channels at 2 ohms, and 150 watts x 2 channels at 4 ohms in bridged mode.

It has a MOSFET power supply, cast aluminum heatsink with top mounted controls, and accepts high level or RCA level inputs. The 0-6dB on board Punch EQ Control allows you to adjust the sound output of the amplifier.

The amplifier with 300 watts max power @ 2 ohms and features Class A/B topology, short circuit protection, thermal overload protection, high input voltage warning, and over-excursion.

The R300X4 also has a variable low pass filter with 12dB per octave Butterworth alignment and a variable bass boost at 45Hz for the sub channel, as well as independent gain control on each pair of channels. The amp also has a 2/4 channel switch with 2 ohms Stereo capability, preamp input included.


  • Great for mids and highs
  • Class D without the punch EQ
  • The sound is so crisp and clear


  • Because of the screws holes being at the bottom of deep wells, it is somewhat difficult to mount

Sample Customer Review:

“More than advertised, I like that a lot! Advertised at 300 rms and my qc certificate said my unit produced 402 rms. After much research, this is exactly why I chose Rockford Fosgate.

This is a very strong amp. It feeds my Fosgate punch and prime 6Ă—8’s with very little gain. I matched it with my Fosgate 10” powered sub. The only thing I’d like to see different is a crossover dial (like the sub) instead of a switch."


MTX Audio’s Thunder 75.4 is a Class A/B amplifier that can deliver up to 75W of power per channel at 2 ohms. The Thunder Series amplifiers are designed for the budget-minded consumer, but they still offer plenty of features that make them an excellent choice for any vehicle audio system. Variable LPF and HPF allow you to tailor your sound exactly how you want it, while the surface mount PCB reduces size and weight over traditional designs.

The compact chassis design makes the amplifier easy to install in almost any location in your car or truck, and the compact design won’t take away from your vehicle’s interior aesthetics. Multiple mounting options are included, making sure that you can mount the amplifier exactly where it will fit best.

The Thunder 75.4 comes with a bass remote control that allows you to adjust subwoofer levels easily, whenever you want. Bass boost is adjustable 0 to +18 dB at 40Hz, giving you plenty of flexibility for adjusting punch and impact on your favorite music or movie soundtrack.

It also features a low-level input and preamp outputs so you can hook up multiple amps and create an all-channel system with separate components and crossovers for each speaker in your car or truck’s audio system. The Thunder series amplifiers include MTX Audio logos, making them an excellent choice for anyone who wants to add a little performance and bass boost to their car’s audio system.


  • Good value for the price
  • True wattage
  • Solid and packs a punch


  • Wrong Clipping the amplifier and improper gauge/using low quality wire usually cause overheats

Recommendation: I do recommend installing an epicenter to fix the bass to your liking!

Sample Customer Review:

“I paired this 4-channel amp to two Alpine-S 6.5” speakers and two Alpine-S 6x9s. This combination brings a broad spectrum of mids/highs & lows to the vehicle. Makes the factory Bose and Infinity stereos in my other vehicles sound sub-par. This amp is money well spent, you won’t regret it!"


The Kenwood KAC-M3004 is a compact and powerful 4 channel amplifier that provides ample power for your car audio system. The signal sensing turn on lets you connect the Kenwood amp to your head unit without any need for an external remote lead.

It has a peak output power of 600 Watts and RMS output power of 50 Watts x 4, 75 Watts x 4. It is a bridgeable amplifier that lets you configure the system as 1+2 or 2+1 channels. In addition, it comes with an LED power indicator and a built-in crossover.

In case your car audio system does not have preamp outputs, you can use the RCA pre-outs on the Kenwood KAC-M3004 for powering a full range class D amplifier. You can then use the full set of outputs (the front, rear, and subwoofer) to power different zones in your car audio system.

The amp has a highly efficient MOSFET power supply that delivers greater power with superb efficiency, minimal heat generation, and excellent reliability.


  • This is very easy to install. It takes a few minutes and then it’s done
  • This is a very powerful, and compact amplifier
  • There were no issues with heat, water, or any other abuse it took
  • It fit just below the AC controls and kept it cool


  • Its old version just doesn’t have the boost

Sample Customer Review:

“Small compact marine amp. This amp doubled the sound output of the head unit which allows me to easily hear my music at hwy speeds on my Harley. I’m powering a pair of MTX Thunder 6 1/2 speakers and I can turn the stereo full blast with very minimal distortion.

I installed the Kenwood amp in a 2013 Streetglide which i already installed an aftermarket head unit in…its a tight fit putting the fairing shell back on. I made a mounting bracket to keep the amp from touching the head unit to help with heat disapation. I also used 10 guage power and ground cables and 14 guage speaker wires for my connection’s. Im also only using 2 of the 4 channels…to leave room for adding a set of saddle bag speakers later on.”


The Alpine MRV-F300 is a 4-channel amplifier that delivers 75W RMS x 4 (14.4V, 1% THD+N) and 50W RMS x 4 (14.4V, 1% THD+N) to your speakers with high fidelity sound reproduction. The same power in a 40% smaller chassis than the previous generation, this Class D digital amplifier provides plenty of power for your subwoofer or speakers while keeping the size down.

The F300 features an evolution to Alpine’s sound tuning, first seen in their flagship PDX series amplifiers.

The amplifier features an accurate bass reproduction utilizing a 32-bit AKM Processing Unit to fine tune the sound reproduction for more precise control of your speakers.

The amp also features power supply noise isolation on the preamp outputs using Dynamic Noise Suppression technology, which helps regulate the peaks and valleys on the noise spectrum and feed the signal to your speakers with little or no interference.

The amp also supports Bass Engine SQ tuning technology, first introduced in A-Series amps, which provides a more powerful sound by allowing you to tune and customize an amplifier specifically for each speaker. The MRV-F300 is compatible with factory installed systems as well as aftermarket head units and speakers of 4Ω or 8Ω of impedance.


  • Sounds are bright and clear
  • The compact size makes installation a breeze just about anywhere in your car
  • Affordable price with great features
  • Very compatible for small cars
  • Easy to install – you can install it yourself
  • It doesn’t heat much even after prolonged usage


  • If Connecting parts are weak then it can make a buzzing noise

Sample Customer Review:

“I am pushing 4 6Ă—8 type r and they sound outstanding. Like most name brand amps, this was rated at 103 watts per channel at 2ohms. I was happy because while 50 is fine I did consider a higher amp to get closer to the 100 mark. I have the m500 for the sub and again glad I went with 2 separate amps instead of combined. Clean power = quality music.”


The Kicker DXA 250.4 is a great choice for powering a pair of door speakers or a 3-way system in a 2 seat car. The FIT Fail Safe Integration Technology ensures that your system will always sound its best by providing the right amount of power to each amplifier based on signal levels, and KickEQ bass boost gives you the option to add more low end if desired.

A lightweight aluminum heat sink keeps this amp cool under pressure, while the soft-mounting system minimizes vibrations for top sound quality. The amp’s signal to noise ratio of 95 dB ensures your music will sound clear, while the Hi/Lo/Off crossovers give you control over your sound.

The 4 gauge power and ground wire terminals bring the max out of this little powerhouse, with a MOSFET power supply that supplies up to 240 watts RMS.


  • Sounds great and easy to assemble
  • Zero noise and pretty good quality sound coming to highs
  • Gain and Bass Boost are independently controllable
  • It also enables you to connect two amplifiers from a single input source, eliminating the need for RCA splitters


  • Not yet to describe

Sample Customer Review:

“Fits nicely under my passenger seat. The sound is fantastic. Crystal clear with plenty of power for me. I’m using a kenwood head unit and the stock speakers in my 2010 4runner. I would recommend adding a small amp like this before spending a fortune on speakers. I’ve used good aftermarket speakers with good aftermarket head units in the past and the results are not nearly as good as running the stock speakers on a standalone amp.

And most modern factory speakers should hold up well to a small amp like this one. I bought the kicker 125.2 amp for a sub a while back and I was so impressed that I went ahead and got the 250.4 when it was time to work on the door speakers. The RMS ratings are low, but it will fill your car with sound. And it will sound fantastic while doing it.”


The Audiopipe APMI-4095 1300-Watt 4-Channel Amp is the ideal solution for powering your car audio system. The small footprint of this beastly amp allows more versatile mounting options and saves you precious cargo space. A wired bass knob gives you full control over your bass from the comfort of your front seat.

Class AB circuitry ensures that your music is as clear as possible and high and low pass filters keep the right frequencies on the right speakers. Your speakers will never sound the same once you hook up the Audiopipe APMI-4095 1300-Watt 4-Channel Amp.

The Audiopipe APMI-4095 Class AB Compact Mini 4 Channel car Amplifier is the ideal amp for your vehicle. It features high and low level inputs, a wired bass knob, class AB circuitry, and a small footprint all at an affordable price. The power output is 1300 watts at 2 ohms with a frequency response of 10 Hz to 40 kHz.

Your speakers will never sound the same once you hook up the APMI-4095 Class AB Compact Mini 4 Channel car Amplifier from Audiopipe.


  • Sounds sharp and has plenty of power pushing these speakers to the limit
  • Its compact size of it can make it fit anywhere easily
  • Good quality sound


  • Improper installation or using low quality wires may cause overheating

Sample Customer Review:

“This amp is great! Have it powering 2 6.5 and 2 6Ă—9 Kenwood 100 rms each in my doors. Sounds sharp and has plenty of power pushing these speakers to the limit. First time purchasing audiopipe, very impressed!”


Boss Audio OX4.400 4 Channel Car Amplifier is the best car amplifier to use for your car audio system if you are looking for a high-quality, powerful and affordable amplifier. It has many features that make it stand out among other amplifiers in its price range. The amplifier can be used to power up to four speakers when used with an appropriate wiring configuration.

This model is also bridgeable which means that you can add two more channels of amplification by using a Y-cable and connecting the positive terminals of all three amps together and the negative terminals together. This would make an instant 3-channel amplifier out of this single channel one. It has a power rating of 400 watts RMS at 4 Ohms and 200 watts RMS or 75 watts RMS x4 at 2 ohms.

The OX4.400 is built with heavy duty MOSFET output devices which are much better than bipolar transistors that are used in most car amps, especially those that fall within its price range. This type of technology makes it possible for Boss Audio to produce their amplifiers at lower costs without sacrificing any sound quality at all.

The amp also uses thick gauge 10 AWG power and ground leads; these types of wires can handle the high currents produced by the amp without any problems.

The power supply transformer is mounted on a solid aluminum bracket instead of the plastic brackets used by most car amps; this makes it much more durable and stable in case of an accident or high impact. The amplifier also has threaded speaker-level inputs which make installation easier because you don’t need to cut your car’s factory wiring in order to use this type of input as you do with other amplifiers.

You can install the Boss Audio OX4.400 4 Channel Amplifier inside your vehicle so that it does not get exposed directly to moisture, dust, dirt, etc., however, if you have a fairly big sound system then there might be a push for some airflow from outside so that the amp doesn’t overheat.


  • Reasonable Price
  • Bridgeable
  • Charming Design
  • Thermal Overload Speaker and Short Protection


  • Not happened yet a serious issue

Sample Customer Review:

“Definitely exceeded my expectation. Thought my other amp was messing up so I ordered this. Got it wired in and it definitely has the power and sound quality.”


The Rockville RVF-2 is a high performance, ultra compact car amplifier capable of producing up to 1200 watts peak power and 300 watts RMS. The amp features a fully adjustable 6dB / Octave crossover with differential circuitry for the highest quality sound possible from your speakers.

This unit also includes a low pass filter: 50Hz – 200Hz and a high pass filter: 50Hz – 1.2KHz along with an IC controlled protection circuit that ensures that you will never be overdriving your speakers.

The RVF-2 is very small and lightweight, which makes it an ideal amplifier for tight spaces. The amp includes input connections via RCA/Auxiliary inputs and preamp level outputs to feed other amplifiers or signal processors.

Connections can also be made directly to the speaker system with 4 Gauge nickel plated power and ground connectors along with a pair of 10-gauge bare wiring connection terminals.

The 2 x 150 watts stereo output allows for great flexibility when you need to run separate components in multiple locations. There are also several optional accessories available from Rockville that offer even more installation solutions such as a flush mount kit, rubber grommets, and stainless steel wires.

The amp features a full metal exterior with a bright blue LED light so you can see the amplifier running in dark spaces. The rear panel of the unit even has an attached tilt/angle adjustable bracket for easy mounting or improved bass sound projection allowing your system to be heard and felt from anywhere inside the vehicle.

If small size and flexibility are what you need, this little powerhouse is sure to meet all of your demands!


  • Multiple wiring options from 4 ohms to 1 ohm
  • With the subsonic filter and bass boost, this thing hits hard
  • Great amp for its price
  • Dyno-Certified RMS


  • Sometimes it does not do well with low bass, but not all the time

Sample Customer Review:

“I cant say its the best amp on the market. but I can say its the best amp for its price. i upgraded from a single 12” boss sub (big mistake) to 2 12" skar subs, the new speakers needed a lot more power than my 500 watt pioneer could provide, and when i hooked my speakers to my rockville amp and tuned it, it was exactly what i was looking for. not lie, my speakers can take a lot more power so i am pushing this amp a bit, but it has had no heating issues, hasn’t cut in and out like you would see normally. so i believe it is truly providing what it claims."


The Planet Audio AC800.4 is a Class A/B 4-channel amplifier with 800 Watts RMS at 2 Ohms and 400 Watts RMS at 4 Ohms and is designed to power subwoofers or full-range speakers in any vehicle. This amp has a variable low pass crossover that ranges from 40Hz to 200Hz, as well as a variable bass boost (0-18dB) for the perfect sound control over your system.

The high-level inputs allow you to use the factory radio and wire it to this amp for clean factory-type sound, powering your speakers with the same quality as the radio. The solid aluminum heatsink will keep this amp running cool even at high volume, and all of the RCA connections will use a push-style connection that is tight and durable. The surface-mounted components ensure excellent sound quality while increasing signal response and power output over more conventional circuit boards.


  • It has better sound quality
  • This amp works great for the price
  • It hits hard only advice is to get the Amp wiring kit make hook up a breeze
  • It is best to replace factory installed amplifiers


  • A little bit of issue about getting hot but not for a long time

Sample Customer Review:

“Needed an amp with a small footprint and this one just fit. I am running it as a 3 channel with 2-6.5” full range and 1-12" sub. Also hooked up a Bluetooth adapter to run it directly from my phone, no head unit. The high and low pass filters are working ok. I was pleasantly surprised with the sound. I am not going to be rattling windows with my set up, but for the price, I would recommend it."


The Crunch SA-1100.4 is a four-channel car amplifier that can be configured in stereo, dual stereo bridged mode or mono bridge mode for even more power. This high-powered amp features an adjustable variable electronic crossover with 12 dB per octave slopes for precise tuning of your front and rear speakers plus subwoofer.

The Crunch SA-1100.4’s advanced circuitry provides superior sound quality with minimal distortion and noise so you can enjoy clean, crisp audio without annoying static or hissing sounds. The preamp level inputs allow you to connect your OEM radioshoack and steering wheel controls to the amp for convenient control while retaining your stock radio (no FM modulators or line converters required). The compact all-metal chassis is built tough to take the rigors of life in a car.


  • No clipping, no distortion, crystal clear sound
  • Cheap way to improve your car audio


  • Not yet

Sample Customer Review:

“This little amp has my 6 by nines and 61/2 playing loud and super clear.”


If you are looking for the best car amplifier for sound quality, be sure to consider the specs carefully. The internal components of a car amp play a huge role in determining its sound quality. Different subwoofer amps focus on different performance factors including power, impedance matching, and thermal protection; but what makes one subwoofer amp better than another?

It comes down to the technology that each subwoofer amp uses within itself. When it comes to sound quality, there is no replacement for high-quality parts and construction methods. Do not buy any cheap car amplifier without reading Car Amplifier Reviews because this will cause unnecessary damage to your speakers and cut out frequently due to high heat.


The space available in the car is a very important factor which should be taken into consideration. This means if you have got enough space for an amplifier then only go to buy it. If not, choose any other alternative like speakers or subwoofer, etc.

However, there are some good quality amplifiers that can provide sound without occupying too much of your room. You can either install them on the side doors or on the backside of your SUV vehicle depending upon their size and compatibility with your car’s interior design.


Amplifiers come in different sizes, shapes, and designs however it is very important to choose the amp which has an excellent design that makes it look stylish, cool, and classy at the same time.


There are many car amplifiers available in the market however it is very important to purchase an amplifier that has good quality & size so it can easily fit under the seat or in trunks. Because if you will purchase an amplifier that is too big then this may create problems while making space for other things in your car or if you are purchasing one amplifier because both are required by music lovers then keep this thing into consideration both should have the same size.


Amplifiers are available in the market however first of all decide what type of amplifier you want to buy for your car. If you are looking for some subtle look amplifiers then go with a normal amplifier. But if you are looking for some stylish, classy, and funky design amplifiers then choose those amplifiers which are designed by experts or artists who are well versed with the latest design trends because they know how important is looking factor when it comes to buying any electronic product, especially motor accessories.


Other factors to look for in car amplifiers are RCA inputs, tweeter controls, level controls, and bass boost features. There are different types of inputs on the market that allow you to hook up your subwoofers, tweeters, or speakers all at once with one amplifier rather than using separate amps for every channel of your speaker system.

Tweeter controls let you adjust how much power is delivered to your tweeters, while level controls help balance sound levels if they’re too high or too low coming out of the subwoofer channels. Bass boost features can give you more oomph on your subwoofers if needed by working as a supplement to an already powerful amplifier.


Other extras to look for are RCA inputs, tweeter controls, level controls, and bass boost features. There are different types of inputs on the market that allow you to hook up your subwoofers, tweeters, or speakers all at once with one amplifier rather than using separate amps for every channel of your speaker system.

Tweeter controls let you adjust how much power is delivered to your tweeters, while level controls help balance sound levels if they’re too high or too low coming out of the subwoofer channels. Bass boost features can give you more oomph on your subwoofers if needed by working as a supplement to an already powerful amplifier.


Some other, lower price amps may still get the job done for you if your power efficiency isn’t a major issue and sound quality is more important than audio quality. Just be sure to read reviews on any amplifiers you’re considering buying so that you can be certain they’ll deliver what you want in terms of sound.

If possible, listen to them before purchasing as well so that you can compare their sound levels with others and decide which one delivers the best sound for its cost.


Many people think that the number of channels is not important, but they are wrong. The quality of the amplifier determines how many speakers can be supported by it at once. If you want an amp that supports two subwoofers, satellite speakers, and a component stereo system, you need an amp with at least three output channels.

For powering subwoofers only, four-channel amps are ideal because low frequencies require more power to drive than high frequencies.

Related Article: 7 Signs of a bad car amplifier-Guide


The amount of power that your car amplifier produces will determine the maximum volume level before distortion begins to occur. There’s no sense in spending money on a high-quality subwoofer if it isn’t powered properly, so make sure to choose an amplifier with power for your setup before making a purchase.

Power doesn’t just affect volume, however; it also affects a subwoofer or stereo system’s sensitivity and “tightness”. If an amplifier has low power, the speakers won’t play as loud as possible without distorting.


If you want your music to sound clean and clear at all times, make sure to choose a car amp with enough watts per channel for your speakers. In short, higher wattage produces better sound quality. In order to accurately measure wattage – especially in car amps – each manufacturer uses different measurements.

For example, some manufacturers use RMS ratings while others use peak ratings because they calculate things differently. The important thing is that you match the right type of amp with the specifications of your speakers.


The only reason that you should ever choose a car amplifier with resistance is if you want to use an additional amp or subwoofer in the future. Some amps, such as 2-channel amps, don’t necessarily need this extra power because they can handle low impedance loads on their own; however, it’s always a good idea to have some extra channel capacity just in case you decide to add more speakers later on.

It is recommended by experts not to buy the best car amplifier for sound quality with high level of resistance (more than 4 ohms). CEA Logo

CEA (Consumer Electronics Association) logo: This logo plays an important role when buying the best car amplifier for sound quality. It lets consumers know the minimum performance standard that every amplifier and subwoofer must meet. Before you buy a new amp, look for this logo to give yourself an indication of the product’s quality.


The signal-to-noise (S/N) ratio is the amount of extra “hiss” that occurs during quiet music passages compared to the volume level at which distortion begins to occur. A high S/N means better sound quality; it means less distortion and more overall power.

Some car amplifiers come with settings (like low pass filters and crossovers) that allow their owners to change how they process sounds; if you want full control over the output of your speakers, make sure to choose an amplifier that has more of a range. Most car amps have an S/N of 80 dB (decibels) or higher.


The best car amplifier for sound quality will come with at least a 1-year warranty on all parts and labor. If you spend $500+ on an amplifier, you should expect to get at least some type of coverage if it malfunctions within the first year of use.

Since this is the case, it’s important to read customer reviews online before making any purchase so that you know what types of defects are common in different amplifiers; some brands simply don’t work as well as others, which means that they require repairs more often than their competitors do.


Choosing an amp with high speaker efficiency will ensure that you get the most out of your system, and it will save you money in the long run. If an amplifier is inefficient, it means that it needs more power to drive low-impedance speakers (like most subwoofers). Not only can this decrease your sound quality but it can also damage other components in your car.


Car amplifiers come in 2 channel and 4 channel configurations. The 2 channel car amplifier is used for powering a subwoofer while the 4 channel amplifier can be used to power speakers which include tweeters, midranges, subwoofers, or any combination of these.

This midrange or full range speaker will help you have better sound performance with your full range speakers because the subwoofer plays only low frequencies which you can’t hear clearly especially when driving in hilly areas.

4 Channels are not only necessary for multi woofers but also it has another advantage that it can be divided into two separate stereo amplifiers. And each one of them has its own separate power supply; this spare power supply does not affect the other amplifier’s power supply. So if one of them gets damaged you can still use the other one.


Class AB amplifiers are the most common type of amplifier that you will see in a car, home theatre system, or anywhere else. Class D amps are becoming more popular as an alternative to the traditional Class AB amplifier because they have some advantages over this other class.

Both class AB and class D amplifiers take power from a source such as a battery and convert it into electrical energy by taking advantage of basic circuit components such as transistors, resistors, and diodes. This electrical energy is capable of moving a speaker which creates sound waves.

The only difference between the two classes is that Class AB amps maintain 2 voltage states while Class D amps maintain multiple voltage states that appear to create continuous voltage changes within each cycle.


1. Which type of car amplifier to Buy?

The type of car amplifier you should buy depends on your personal preferences. If you are looking for a simple installation that will not take too long and do not want to spend too much money, go with Class D models. However, if you are planning to use them in combination with subwoofers or high-end speaker systems, opt for Class AB amps.

2. What size car amplifier to buy?

In general, the bigger the amp, the more power it can produce. However, this also means that they will be physically larger and heavier than smaller models. They also use up car batteries faster, which is something you should keep in mind.

If your car’s electrical system has limited resources or provides poor power quality (e.g., your car battery is old, the alternator fails to provide enough power, or your car’s electrical system has high parasitic loads). We recommend that you get an amp that is slightly more powerful than what your speakers can handle.

3. What is a class D car amp?

Class D amps are a new type of amplifier that is known for having the ability to produce more power while using less energy than traditional class A, B or AB models. They do this by changing the output stage from analog to digital which allows them to use an advanced chip that can run at high speed and increase sound quality while improving efficiency.

Class D car amps also have a few other benefits such as being lighter and more compact which makes them easy to install in pretty much any location of your vehicle. On top of all that, Class D amps don’t generate as much heat as their older counterparts so they work better even when placed under heavy loads for extended periods of time.

4. What is a mono amp?

A mono amp is an amplifier that usually has only one channel. They are very simple which makes them cheaper to manufacture and therefore they can be purchased for less money compared to other models. In the case of a four-channel amp, each section would need to amplify two channels at once which requires more components and power, making it harder to build something good under a tight budget.

Mono amps are best used when you have a mono speaker system or you want to reduce the number of amplifiers in your car’s sound system for some reason.

5. What is a variable bass boost?

A variable bass boost is an adjustable feature that can be found on many amplifiers. When you activate the VBass, it changes the frequency response and adds power to specific frequencies to improve your music’s low-end performance.

This way, you don’t have to buy a separate equalizer because it will cost less and turn out to be more efficient than if you were to add one in every section of your car’s sound system.

6. What does Peak Power mean?

Peak power (also called max power) refers to how much wattage an amplifier can put out for a short period of time before overheating or shutting down. On average, peak power rating should always be higher than what you need when building a high-quality sound system for your vehicle.

This way, you are less likely to face issues or choose a product that isn’t powerful enough to provide the best possible performance.

7. How much power do I need?

To figure out the size of an amp you need, measure all your speakers and subwoofers first. It is recommended to take the higher number of each set because this will give you a more accurate estimate of how much power they require to operate at full capacity without overloads. To be on the safe side, go for at least 10 percent more wattage than what you measured since it’s better to have too much power instead of not enough when it comes to cars.

That being said, there are plenty of other things that can affect your amp size such as the type of music you want to play, its volume level and how loud your speakers are. It’s important to keep all these things in mind because quality amps cost a lot of money so it would be a pity if they weren’t used to their full potential due to miscalculations or bad planning on your part.

8. What does Ohm stability mean?

Ohm stability is an important factor that shows just how resistant the model you are looking at is to power fluctuations. You should choose an amplifier that has more than enough energy storage capacity since this will prevent electrical damage from heat, speaker overloads, or any other type of issue caused by voltage drops below acceptable levels. This way you won’t have to replace your amp every time the power goes out in your neighborhood.

9. What does RMS mean?

RMS stands for root mean square and it is a technical term that refers to all-time average wattage output. While Peak Power gives you a good idea of how much power an amp can handle, RMS shows the actual performance under normal circumstances when music is playing through your sound system. Lower end amps tend to have higher peak power ratings but much lower RMS ones compared to their high-end counterparts which makes them less efficient in real life applications.

10. How much do car amplifiers cost?

Car amps vary in price from one model to another depending on what kind of additional features they have where they were manufactured and several other factors as well. On average, you can expect to pay around $100 for a simple unit with decent performance and up to $500 or more for better quality amps that will last longer and perform much better.

11. Which amplifier brand is the best?

Although there are several popular brands out on the market such as Alpine, Blaupunkt, and Pioneer, nobody can objectively say which one is the absolute best on the market because it all comes down to personal preferences.

However, due to their long-term experience in this industry, we’d recommend going for Pioneer, Boss, Kenwood, Alpine, Planet Audio, Rockford Fostage, MTX, and Rockville amplifiers if you want your new sound system installed professionally just like they would do at an authorized dealer. You can find out more about them here: www.pioneer-caraudio.com

12. What is the most important aspect of a car amplifier?

One of the most important aspects to keep in mind when purchasing car amplifiers is size. Although you might be tempted to mount the largest unit on your dash, this can cause issues such as heat generation which can shorten their lifespan significantly if they aren’t designed for large amounts of vibrations and high temperatures.

This also goes for trunk mounted amps which should always have an appropriate amount of ventilation while operating at all times to avoid overheating problems. For more information about proper amp installation visit our blog or site.

13. Should I get a bridgeable car amplifier?

Bridgeable car amplifiers are more versatile than mono ones, especially if you plan on getting an amp that has multiple channels which offer the same amount of wattage output. Multiple channels also make it much easier to fine tune your sound system since you can choose which speakers receive more power individually instead of having to settle for a pre-defined configuration.

If you want to get one with multiple channels but only have a single subwoofer in your vehicle, you should invest in something that can be bridged into a monoblock configuration as this will give you more flexibility regardless of the number of speakers connected.

14. Is it necessary to get an amplifier wiring kit?

You don’t always need an amplifier wiring kit but they do come in handy for several reasons. An amp wiring kit comes with all the materials you need for properly installing your amplifier which includes fuses, power cables, ground cables, and speaker wires. You can also use it to replace old or damaged components in case they have been exposed to extreme amounts of heat over a long period of time.

Once again though, this isn’t necessary if you are an experienced installer because most people can figure out how to connect everything without any problems whatsoever. However, if you are not completely sure about the entire process, the best thing to do is go ahead and purchase one anyway as it will make things much easier for you especially if this is your first time doing something like this.

15. Where are car amplifiers mounted?

Car amplifiers are mostly mounted in the trunk or under the seat of your car depending on their size and power output. However, you should always make sure to consult with an experienced installer if you want them installed in a different location as this can compromise their efficiency due to high amounts of temperatures that cannot escape properly.

Some people choose to mount their amps externally but this is not recommended since it will severely reduce their lifespan which defeats the purpose of installing new equipment in the first place.

16. Should I get 2 Ohm or 4 Ohm amplifiers?

If you are planning on getting one or more subwoofers for your new sound system, it would be advisable to choose 4 Ohm amps instead of 2 Ohm ones since they can provide more power to them without any major changes.

They will also work better with less power but this varies from amp to amp so you should always check the owner’s manual before making a purchase if you aren’t sure about what type of configuration is supported.

17. Is amplification required for my car radio?

No, amplification isn’t required to make your car radio louder but it will help bring out the full potential of your factory-installed speakers. Doing this is particularly useful if you don’t want to spend too much money on installation costs because all you need to do is upgrade your equipment in order to enjoy a much better sound.

18. How can I install an amplifier myself?

If you are anything like me, you don’t really trust yourself with tasks that require delicate work with the potential of causing irreversible damage if not done correctly.

Thankfully, there are plenty of resources out there that will help you get started on the entire process by providing tips and guidelines that will save you both time and money while making it possible for almost anyone to complete without running into problems along the way.


So we have covered all essential things to make your choice simple, easy, and perfect. No issue if you are a beginner or know a little bit about 4 channel amplifiers.

The potion of our comprehensive guide, “Which factors should you consider when purchasing” is very important before going to buy. We’ve also included a list of 10 car amplifiers that have received rave reviews from customers who were able to experience their superior performance firsthand.

For deep knowledge also included: What is the difference between 2 channel and 4 channel amplifiers?, relevant FAQs. All these questions will be answered by reading through this blog post!

We hope this guide will help you to achieve your target of buying Best 4 channel amp for sound quality. We have tried to complete this guide, but if you feel anything has been missed then please drop a kind comment below.

We’ll try to update you soon. As always, we have only one request, please share this guide with your friends that are facing these issues or worry about buying 4 channel car amplifier.

Thanks for reading!