7 Best 4 Channel AMP for Door Speakers

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Not all cars come with a high-quality audio system unless you have purchased a high-end vehicle, but everyone deserves high-quality music.

Thankfully there are a lot of aftermarket solutions for this, you can get a high-quality music system fitted in your car without having to buy premium cars.

We have selected a few best 4 channel AMP for door speakers, that will make your factory audio system form wack to magnificent.

Here is a list of the best 4 channel amps so that you can choose the best for yourself.

Best 4 Channel AMP for Door Speakers

Alpine MRV-F300

Alpine MRV-F300

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Alpine has been in the market for a long time, they are brand that has been making top-quality audio devices for years now.

This AMP has a crossover frequency of 50-400 Hz, which means that it will be directing more low to the subwoofers or woofers, but the power of subwoofers should not be more than 100W.

this AMP has excellent THD of 0.03 percent, depending on your configuration, it can go up to 1 percent.

You don’t have to worry about the heating issues and power consumption, thanks to the compact profile and D class circuitry.

We can assure you that this will produce excellent audio and is a bang for the buck, but it is a little expensive considering all things.

Pros
  • Has a fairly compact profile
  • Has the largest crossover range on our list at 50 to 400 Hz
  • Has an excellent THD that ranges from 1 percent all the way down to 0.03 percent depending on your configuration
Cons
  • An S/N ratio of 98/81 CEA dB is pretty poor
  • A tad expensive for what you get

Rockford Fosgate P600X4 Punch

Rockford Fosgate P600X4 Punch

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Rockford is also a big name in the music industry, they have produced a number of high-quality music products over time.

This AMP from Rockford can take input from way more sources than most amps with an input sensitivity ranging from 150 mV to 12 volts. If you have an 8-track, you can consider this APM.

But unfortunately, if you have 4 ohms speakers, this is not going to perform as well and it will only give you 75 watts per channel. also, it is a little bit expensive. However, it compensates with easy to use controls.

Pros
  • Easy setup
  • Has one of the highest S/N ratios at 105/85 CEA dB
  • 150 watts per channel at 2 ohms is pretty good
Cons
  • One of the more expensive amps on our list
  • 75 watts per channel at 4 ohms is not that great

JL Audio JX400/4D

JL Audio JX400/4D

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Jl Audio may not be as popular as other brands in our list, it is still a very well-known brand in the automotive audio market. This amp by JL audio is made for being used as a single piece in a multi amp setup. this is possible because of the feature which is not present on many other amps, which is called as preamp outputs.

It provides 4-volt preamp output, you can run the connection from the JL audio for your 4-channel 6×9 setup into a second amp for a subwoofer. If you want to have an impressive sound system with heavy bass, you must get a dedicated amp for that purpose.

The only downside of this amp is that it produces a little bit of noise with the sensitivity of 93/73 dB.

Pros
  • One of the smallest profiles on our list
  • A single channel RMS of 70 watts at 4 ohms and 100 watts at 2 ohms is pretty good
  • The preamp inputs and output allows this amp to be daisy chained to another amp
Cons
  • No internal fusing
  • A S/N Ratio of 93/73 CEA dB is a fairly low
  • The filter frequency of 50 Hz to 200 Hz is somewhat narrow

Kicker CXA300.4

Kicker CXA300.4

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Kicker may not be a renowned brand as other entries in our list, but that certainly doesn’t mean that it is no good.

In fact, the kicker is one of the least expensive amps in our list and it is the best 4 channel amp for the money. It is absolutely better than the least expensive amps in the market having an S/N ratio of 95 dB, which is very good at this price point. It has a sensitivity range of 125 mV to 10 V, this is great for running legacy head units.

The caviar here is that it is the largest amp in the list, which makes it difficult to fit, but it has a very efficient heat sink to cool of the system so you don’t have to worry about the heating issue.

Pros
  • One of the least expensive amps on our list
  • Has fairly good S/N ratio of 95 dB
Cons
  • Not include a built-in fuse
  • A single channel RMS of 40 watts at 4 ohms and 75 watts at 2 ohms is pretty low
  • One of the larger profile amps on our list

Kenwood KAC-M3004

Kenwood KAC-M3004

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Just like Alpine, Kenwood is a pioneer in making audio devices, they have been in the industry for decades and they know the game very well.

This amp by Kenwood is a very compact unit. so compact that it can be used for a motorcycle music system.

It has switchable crossovers, you can use this for 4 channel or 2 channel bridged configuration.

This amp has minor noise issues as the S/N ratio is not near-standard at 76 dB. the frequency is 20-20 kHz.

It stands out with the RMS wattage of 75 W at 2 ohms and 50 W at 4 ohms, which is really impressive considering the price point.

Pros
  • Easy to wire up
  • Has the smallest profile on our list
  • The least expensive amp on our list
Cons
  • An RMS wattage of 75 at 2 ohms and 50 at 4 ohms is somewhat low
  • An S/N ratio of 76 dB is poor

MTX Audio THUNDER75.4 Thunder Series

MTX Audio THUNDER75.4 Thunder Series

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MTX is another brand which is pretty new in the market, but it has made its name in the market with great products like this one.

The Thunder Series 4 channel amp is the best bang for the buck amp in our list.

This amp by MTX produces 100W RMS at 2 ohms and an amazing 75W at 4 ohms, this amp is the best allrounder with the frequency ranging from 15 Hz to 25 kHz, which is 5 Hz lower and kHz above any standard amp.

This the only amp other than the Alpine, that has THD below 1 percent.

It is absolutely a bang for the buck amp.

The only downside is that it produces heat.

Pros
  • 100 watts per channel at 2 ohms and 75 watts per channel at 4 ohms is pretty good
  • A THD below 0.05 percent is tied for first on the list
  • A frequency range of 15 Hz to 25 kHz is great
Cons
  • A fairly expensive amp for our list
  • Produces more heat than most of the amps on our list with the A/B Topology

Alpine X-A70F X-Series

Alpine X-A70F X-Series

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This is the 2nd entry from Alpine in our list, Alpine is a high-end brand in the automotive audio industry, that is why we came up with this amp from Alpine. It is the most high-performance amp, hence, the most expensive.

If you want the best audio quality, this amp is for you.

The Alpine X-A70F produces 120W of RMS per channel at 4 ohms. No other amp in our list is capable of doing this. The soundscape of the Alpine X-A70F ranges from 5 Hz to 100 kHz. No other comes near these numbers. Also, it produces the least amount of noise at 115/95 dB.

This is one of the largest amps in our list. It comes with class D topology, so heat is not an issue here.

Pros
  • Easily adjustable settings
  • Zero distortion
  • The amplifier has an active crossover
  • Clear sound and high fidelity
Cons
  • The most expensive amp on our list
  • One of the larger profiles for amps reviewed
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