The 9 Best 400 Watt Subwoofer Amps (2023 reviews)

The skar audio 400 watt subwoofer amp is capable of outshining several other amp featured in this list in overall features. The D is a competition grade monoblock class d subwoofer amplifier that is designed to deliver unequivocal performance and power output. This amplifier features an advanced heatsink design that allows for maximum cooling, as well as. The amp gets very warm, but not hot, and this after pushing it hard for at least a full hour at a time. It hits hard and unbelievably clean.

This amp is great for any combination, wiring your 18 for a 1 ohm load will get you max output. It’s power thirsty so make sure you have the juice it needs. The efficiency of this series is much better than the cheaper series.

Why We Like This:

Better components, produces a better sound with less distortion
Nice looking amp with quality bass knob
Easy to install sounds great value not bad
Great value for a amazing amplifier

Best With capacitor: nvx 400 Watt Subwoofer Amp

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This new line of revolutionarily compact and surprisingly powerful amps will blow you away. The VAD Series of amplifiers are available in a number of different sizes and meant for a number of different applications. This specific vadm2 amplifier has a total rms power output of 440w all in a chassis not much larger than a dollar bill. It has a rms power rating all the way up to 2700 watts rms for the most powerful of subwoofers.

The Rockford sounded significantly better with alot less distortion. Cutting edge Micro Class D technology allows the amplifier to be extremely compact. This allows this amplifier to be installed in nearly any application. The VAD line is incredibly compact and can be placed nearly anywhere in your vehicle.

Why We Like This:

Lot of satisfied buyers
Delivers what they promise

Best For A Car: Boss Audio systems 400 Watt Subwoofer Amp

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The boss audio systems 400 watt subwoofer amp should be able to handle its purpose and duties with ease. If it’s a 200watt rms @2 speaker it will work perfectly with two bridged connections. It pushes the mid-range speakers very well. It’s easy to pull the fuse out and get a pair of pliers to pull it out. If you measure a “4 ohm” loudspeaker with your multimeter, it will have a DC resistance of somewhere around 3–3.5 ohms. The product looks and feels well made. The r1004 will work great with your speakers. It has no arms or legs.

Why We Like This:

Works really well, good protection circuitry
Works great with crossover for mids and highs
Watt component speakers and they sound great

Best With woofer: Kicker Great Amplifier

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The kicker great amplifier is satisfactory and appropriate and fits well with your regular usage. This small, powerfully, little amp is pushing a 15 with no problem. It does add bass but it’s more like a bass control on your head unit. It gives it breathing room. The unit has a dip inside to convert signal level. The Series amps include vertical and horizontal mounting hardware, so you can show off your install style. It does put out great sounding and powerful bass. This amp has plenty of power.

Why We Like This:

Great kicker power, small package size makes for easy placement during installation
Highly efficient amplifiers 87.5 percent till clipping at 2-4ohms
Great performance and easy to tune
30 hz, both amps are digital and have high efficiency

Best With aftermarket: Skar Audio Great Amp

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Skar Audio offers a variety of amp for personal choice and yet maintaining quality in all the variants. It’s a mono amplifier designed to run subwoofers. It delivers well over 1200w at 1ohm. This amp should give you 1000 watts rms easily. It is allowed for maximum reliability & performance.

Their Conformal Coating is a good one. The white finish also looks very nice. It is perfect for the 600w rms series skar subs.

Why We Like This:

Plenty of power to drop them beats
Very dependable, powerfull amp for subs
Fit great under the driver seat of the wrangler
Worked flawlessly with two kicker single 4 ohm subs

Best For The Money: Kicker 400 Watt Subwoofer Amp

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This amp is a Subwoofer Amp and it's a single channel. This kicker amp produces a minimum of 400 watts of power from your battery and as much as 40 volts (400 watts) of speaker-level input signal. The Series amps include vertical and horizontal mounting hardware, so you can show off your install style.

This Amp will do 400 watts at 1ohm, 300 @ 2 ohm, and 150 watts @ 4 ohm. These powerful amps work with as little as nine volts of power from your battery and as much as 40 volts (400 watts) of speaker-level input signal. The amp is so small and easy to hide. The Series amplifier technology provides clean, powerful music in nearly any vehicle on the road today, without changing your radio or adding a line-out converter.

Why We Like This:

Small compact and packs a punch
As an added bonus, kicker certifies thier amps to perform above the power targets
Great power and ease of install
Turn on even with premium factory audio systems

Best For Small bump: Rockville 400 Watt Subwoofer Amp

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The rockville 400 watt subwoofer amp's material feels more premium than its price would suggest. The Rockville amplifier installation kits feature a new soft abrasion proof insulating jacket. It has blue power wire, clear ground wire, and twisted pair rcas with matching colors. It has plenty of power and quite a bit of adjustment in terms of lowpass and subsonic filter. It comes with a bass control. It is a measurement of conductivity and how much signal is loss per foot of wire.

The wire kit that comes with is also a good quality kit with plenty of speaker and remote wire for an additional amp set up. They come with a birth sheet where they actually test each one.

Why We Like This:

Easy to adjust fits practically anywhere
New and hot release

Best For Small Install space: CT Sounds 400 Watt Subwoofer Amp

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Another unusual feature of this amp is the ability to link multiple amps for more output power. It features high voltage, low voltage, over current, and high-temperature protection. The amp itself includes many features not standard on many budget amps such as variable subsonic (for protecting subs in ported enclosures) and variable bass frequency and boost. The user-adjustable controls feature a gain control, low pass filter (lpf), subsonic filter, and bass boost so that you can get the exact sound you are looking for out of your mono amplifier.

The speaker outputs are 12ga and although there are 2 outputs, this is a mono amplifier. The included remote bass level control gives you extra flexibility of adjusting how much or little bass you have from the comfort of your front seat. The amp also draws only 300mA at idle.

Why We Like This:

Good investment for long term
Lot of satisfied buyers

Best With Subwoofer Output: powerbass 400 Watt Subwoofer Amp

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Best part: powerbass 400 watt subwoofer amp costs comparatively low and it is available to ship in 24 hours. Borrowing from PowerBass's classic ASA series, these new amplifiers offer the most desired features in the most compact chassis allowable. Ultra efficient, the ACS amplifiers produce plenty of low distortion high fidelity audio in a small footprint. It features in the most compact chassis allowable.

Why We Like This: