Best 4 Channel Amplifier for Optimal Sound Quality

With MTX Audio, you tap into the legendary power and build quality. This amp fits into a small space and is quite affordable as well. With this clever design, the manufacturer squeezes a lot of power into the amp. Because of the surface mount technology (SMT), there are shorter paths for the audio to take which leads to less vibration. It also comes with short-circuit, DC offset, and thermal protection to protect your amp from trouble.

This compact, hard-hitting, basic amp is well-made and doesn’t compromise your sound quality. It’s also easy to install and offers some great crossover features. The high-pass is adjustable up to 750Hz, while the low-pass can be adjusted to 200Hz.

This isn’t going to give you extreme levels of sound quality; it just isn’t that kind of amp. But, if you desire to get good sound without breaking the bank, this is the way to go.

This is one of the smallest 4 channel amps you can purchase right now. It’s nice looking as well with the metal finished plus blue power indicator. There are even optional end caps which offer a cleaner installation. With a flush-mount custom install, this would be ideal.

It’s rated at 50W x 4 RMS @ 4 Ohms or 75W x 4 RMS @ 2 Ohms. It’s also bridgeable into 150 W x 2 RMS @ 4 Ohms. It also features an adjustable high/low pass plus a bass boost. You’ll have a hard time finding another amp with this quality for such a low price.

We’ve decided to include this model from Alpine as well even though it doesn’t come with the same quality specs of the other amps on our list. That’s because some people just need to stick to a budget, but want the best sound they can get. When that’s the case, you can’t go wrong with this model.

This compact amp uses some high-tech engineering to produce a decent sound quality without draining your bank account. This class D amp never runs hot and offers 45W RMS to four channels. It’s also bridgeable to 90W RMS for two channels.

One of the best qualities is that it provides RCA and speaker level inputs. That’s what allows it to work well with both aftermarket and factory car stereo systems. With the 2/4 channel switch, you can also utilize it when you only have two RCA jacks instead of four.

If you need more power, then you’ll want to check out this option from Rockford Fosgate. You get the legendary and high-powered MTX Audio quality in a compact size that remains affordable. This amp squeezes in a lot of power for the maximum punch.

That’s because of the short audio paths and vibration resistance. There’s also protection for DC, offset, thermal, and short-circuit components to protect you from any issues.

This A/B amp is proven to work well and even comes with some patented designs. The crossover features are also user-friendly and make getting the sound you desire simple. On this model, however, there are no speaker-level inputs.

The fact that we feature several amps from this brand should tell you something about the brand. This lower-end 4 channel amp isn’t going to give you as many features and high level of sound as the last one, but it’s great if you need to pay less.

With that said, there’s still lots of power for even a larger vehicle. You can run this in bridged or mono mode and the Butterworth crossover effectively filters out some high frequencies.

The best part about this option is that it won’t get hot as some other lower-priced models do. That’s because of the cast aluminum heatsink design which also extends the life of this amp.

This is the first 4 channel amp that also offers Bluetooth application. With the popularity of playing music on mobile devices, it only makes sense to design an amp that’s Bluetooth compatible. On top of that, it’s compact and supplies a good amount of power. When its hooked into four speakers, it outputs 45W.

The design also features a coated board which resists moisture. In addition, the amp offers a signal sensing turn-on switch as well. You can think outside the box with this amp and install it on your motorcycle, ATV, RV, or boat for great sound quality anywhere you go. Not only is it small in size, but it doesn’t draw a lot of DC. Plus, the price can’t be beat.

This lightweight and compact amp provides great sound while sticking to a small design. In total, it generates up to 640W of power. In addition, you’ll find that it runs cool even after you’ve been using it for a long time. Alpine points to the anti-shutdown technology they utilize in the unit.

Another perk with this system is that it is easy to install. You won’t have to hook it to any external converters plus the terminal covers simply snap on. This Class D amp is 40% smaller than their previous model they put out. That’s a lot of space you’ll save, plus some extra money you’ll get to keep in your pocket as a result of purchasing this low-cost option.

Speaking of low-cost 4 channel amps, this is one of the cheapest on our list. Kenwood is a respected brand in audio equipment, so there’s no reason not to trust them with your car stereo. This amp is easy to install and doesn’t require a lot of effort to start using.

The peak 600W power output satisfies most car owners and can be used with a three or four-speaker setup. It also features RMS power, voltage sensing auto-on switch, and full circuit protection. This amp weighs just over two pounds and is super compact. That makes it ideal for even the tiniest spaces.

In addition, the board is coated to resist corrosion and moisture. The downside to this option is that Kenwood only offers a one-year warranty, which is less than some other manufacturers. For the price, it’s hard to complain about that, though.

Pioneer is another brand that makes affordable and high-quality stereo components. You’re going to receive decent sound from your front and rear speakers without investing a wad of cash. You also won’t have any trouble finding space for this design. It’s compact and lightweight as well.

This amp offers 100W per channel @ 4 ohms. With the newer circuit design, you’re also protected from any short circuits, low-voltage output, and power surges. If you prefer to pair the front speakers with a subwoofer, this amp is ideal. It’s bridgeable and easy to install. This allows you to have a versatile application for whatever your setup consists of.

Of course, we had to throw this model into the mix. Yes, it is expensive, but you’ll find it’s worth every penny if you desire excellence from your car stereo. This puts out 125W per channel @ 2 ohms. It also includes an audio turn-on circuit that makes your wiring simple. Once the amp senses voltage, it fires itself on without you doing a thing.

Because of the aluminum heat sink that’s built-in, the amp also remains cool during use. There are some other safety features as well, such as short-circuit and overload protection. With the RCA pass-thru outputs, you’ll find installing a subwoofer to the amp is an easy task.

This is a heavier unit than everything else we reviewed. It’s also not very compact, but it’s going to provide your car stereo with the power and sound you deserve to enjoy. It’s an investment well needed if only the best will do.