Best 4 Channel Amp For Door Speakers

Car rides without music can be excruciating – especially if massive traffic jam is involved. Moreover, car rides with music seem to reach a magical level at times. The louder, the better. However, car speakers aren’t the best – neither in quality nor volume, and bass. This is where you consider getting a door speaker for your car when you love music. But, guess what, often door speakers aren’t cut out for the job. In this case, your best option is to get a four-channel one. And today, we’re here to help you find the best 4 channel amp for door speakers out there. Let’s go.

Best 4 Channel Amp for Door Speakers: The Reviews

  1. Pioneer GM-D8604 Class FD 4-Channel Bridgeable Amplifier

As our best, we’ve chosen the Pioneer GM-D8604. Mind you, it’s not exactly the best four-channel amplifier out there but it’s the best for a door speaker. It is compact, portable, easy to install – convenient overall. On top of that, the sound quality and user-interface are also amazing. 

When looking for an amp for door speakers – you should aim for compact ones. And that’s exactly what the Pioneer GM-D8604 brings – compact and a lot more. It has a power of 120 watts with around 125 watts per channel. Imagine the sheer joy on a drive.

Plus, the build quality is solid and can easily stand all the bump rides your car is going to put it through. The ease of installation and the durability goes well together.

Also, it is easy to control and comes with a number of features to gives versatility. However, over time, one or two channels may stop working. The unit isn’t the cheapest but for the quality it provides – it’s a good pick.


  • A very compact body
  • Great power and volume
  • Good sound quality
  • Very easy installation
  • Durable build for a car
  • Good value for money
  • Easy to use


  • Channels may cause trouble after some time
  • A humming sound may appear
  • Gets a bit hot
  1. Alpine MRV-F300 4-Channel Car Amplifier. 

Alpine is a famous name in the amp industry. You can swear by their products because all Alpine amps tend to last quite for long. Isn’t that exactly what you need for a car amp? The ability to last through havoc – through those rides on bumpy roads?

You can expect this amp to survive. It’s easy to install as well. While it doesn’t offer the highest power for each channel, it’s does offer reasonable amounts. The sound quality is solid but isn’t good as the AB topology amps.

You can control this amp easily but it tends to get a bit hot. Other than that, it’s excellent value for the price.


  • Compact, easy to install amp
  • Very durable – brand reputation ensures
  • Regardless of the capacity – it fulfills it well
  • Easy to use
  • Good sound quality
  • Very reasonable price.


  • Tends to heat up
  • Not the best sound quality
  1. Kenwood KAC-M3004 Compact 4 Channel Digital Amplifier 

The smaller the size- the better when it comes to amps meant for door speakers. This Kenwood KAC-M3004 is amplifier is very small but the same can’t be said about the volume – it’s pretty loud.

It doesn’t contain high power – not even for each channel. However, it gets the job done. You’ll love its attention to quality and durability. Even the inner circuit is nicely coated so the harsh environment can’t harm.

However, check the connections well as this amp tends to heat up. Lastly, it’s affordable.


  • Compact
  • Easy to install
  • Very durable build
  • Good sound quality and also loud for its size
  • Affordable price


  • Power isn’t that high.
  • Heats up
  1. Rockford Fosgate P600X4 Amp

Looking for a clean, crisp sound that may as well be compared with the best? An AB-type amp can provide you that. Plus, this Rockford Fosgate amp is one of the best for the purpose. In fact, you’ll love the sound it provides.

While it does have some power, it’s not the highest. But, if a 75 watt per channel is what you’re looking for – it doesn’t do bad. That being said, it does seem to lack at times.

Plus, it’s a bit bigger. So it will be best if you can install it cleverly in your car. Actually, it’s a pretty durable unit. However, it does seem a bit expensive.


  • Provides one of the best quality tones – clean and crisp
  • Very durable and well built
  • User-friendly interface
  • Moderate power


  • Not the most portable or compact
  • A bit expensive
  • May fall a bit short on power at times
  1. Rockville 3200w Peak Four Channel Amp. 

Looking for a budget-friendly amp that won’t die after a short while? If so, check out this Rockville amp that goes beyond the price it comes at. In fact, it will give you a clean, pleasant sound thanks to its AB topology.

It has 800 watts of power but it may not live up to that standard. However, the volume it provides isn’t not bad either. Further, it has a THD of less than 1%.

The unit tends to heat up but it’s still pretty durable.


  • Budget-friendly
  • Pretty clear sound in most cases
  • Easy to set up
  • Pretty durable for the price


  • Not the greatest or accurate power
  • Heats up

Best 4 Channel Amp for Door Speakers: The Buying Guide

None of the amps on our list seems good? If so, you can equip yourself to with knowledge to find the best for you. Here are the few things you seek in a door speaker –

  1. The Channel Design 

You can use the four channels on an amp in various ways. You can connect to the channels as a bridge and use it for a louder, clearer volume. Or, you could connect them all to the speaker alone.

How the channels are designed and how you can use them with the door speaker is an important consideration. Make sure the amp you’re choosing is compatible with your door speaker.

  1. Sound Quality

The only reason you’re investing so much is to enjoy music at its best. So why on Earth would sacrifice on quality? Here are a few factors you should consider.

Total Harmonic Distortion: You want the sound to be as clear as possible without distortion. The lower the THD, the better. You can find a percentage calculation of distortion on the units you’re examining.

Sound to Noise Ratio (SNR): You also want the least noise alongside the sound. However, at louder volumes, noise tends to get it due to physical reasons. The greater the SNR ratio, the better. Because then there will be lesser noise to disturb the quality.

The Filters: You want the sound distributed equally. When you’re considering certain genres, you may want them distributed differently. That’s where the filter comes in. If you want a high pass filter for spreading the sound more and low pass one for the exact opposite.

  1. The Topology

There are various types of 4-Channel amps and the most famous ones are the A/B and D – two complete opposites. The AB type of topology is bulkier, an old-school amp with a sound quality that just can’t be compared. On the other hand, the D type is a more convenient unit with a bit lower sound quality than the former kind. However, with modern development, you can find a bit of both. It’s up to you which type you prefer. For a car – D type or a compact AB type would be best.

  1. The Power

The overall power and the power per channel both should have significant value.

Closing Thoughts
There you are – the finest collection of 4-channel amplifiers in the market, served to you on a silver platter. Lots of them are versatile, and you can tweak them to your preference. And if you still don’t like any of them, not to worry, you can make use of our buyer guide to find the tailor-made 4-channel amp for you.

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