Best Monoblock Car Amplifiers Reviews

Some people still think that amps are for seasoned audiophiles who want the whole world to hear their bass. In fact, an amplifier is a key product for anyone who cares about well-balanced sound. An outboard amp will provide enough power juice to your speakers making your music sound full and clear.

External car amps are classified by different class ratings (A, AB, D, etc.) and are categorized by the number of channels they have (mono, 2-, 4-, 5- etc). The class of an amplifier refers to the amplifier’s internal circuitry, while its number of channels refers to the number of speakers/subs that an amp can power simultaneously.

We’ve reviewed a ton of car amplifiers on this site before including 4 channel amps and 5 channel amps. For the purpose of this article, we’ll be reviewing a few of the best monoblock amps in the market.

Unlike multi-channel amplifiers which can power an entire car audio system, mono-channel amplifiers are more powerful than multi-channel amps, which makes them suitable for running power-hungry subwoofers.

Mono block amplifiers are designed with one thing in mind, delivering high output for louder boom. These amps use class D circuitry design which makes them very efficient in converting available power into usable wattage without generating the type of heat associated with other circuitry designs.

So what are the best monoblock amps out there. Read on to find out.

5 Best Monoblock Amplifiers Reviews

1- Pioneer GM-D8601 Review

  • Class D amp technology
  • Variable low-pass filter (40-240 Hz, 12 dB per octave)
  • Wired remote controls variable bass boost (0-18 dB at 50 Hz)
  • Preamp inputs and outputs
  • Speaker-level inputs via supplied RCA-type adapters

Dimensions  11"W x 2-3/8"H x 7-7/8"D
Number of channels 1
Frequency range 20-20k Hz
Power Handling 
  • 300 watts RMS x 1 at 4 ohms
  • 500 watts RMS x 1 at 2 ohms
  • 800 watts RMS x 1 at 1 ohm
Bridgeable N/A
Amplifier Class D

 Pioneer GM-D8601 Monoblock Amplifier ReviewWhen it comes to car stereo systems, Pioneer is probably one of the most legendary. Pioneer offers a wide range of car audio components including speakers, subwooofers, receivers and amplifiers. Their products have consistently performed well through independent lab testing and in real world installations.

We’ve reviewed a ton of Pioneer car audio components on this site before, and the story hasn’t changed. Pioneer makes top-notch products that are engineered to perform.

The GM-D8601 is one of the best monoblock amplifiers that Pioneer has to offer. It uses the highly efficient class D circuitry design, which allows it to be quite powerful and efficient.

Speaking of power, this compact car amplifier can send up to 800 watts RMS to your sub setup, for powerful, punchy bass that’ll get you and your car rockin’.

This little powerhouse can handle a 1-ohm load without breaking a sweat. This means that you’ll never have to worry about impedance matching when you drop subs into the mix the road.

Pioneer GM-D8601 comes with a variable low-pass filter which lets you to tune your sub/box combo for maximum performance. This amp also comes with a wired remote boost that lets you control the bass level on the go from the driver’s seat. Additionally, this amp has speaker-level inputs which lets you pair it up to any car stereo system.

As for cons, it’s really difficult to think of any. If anything, I’d say that this monoblock amp has no sub-sonic filter.

All in all, if you’re looking for a powerful punch at a phenomenal price, Pioneer GM-D8601 is a great option to consider. It’s one of the best monoblock amps in this price range.

2- Rockford Fosgate Prime R1200-1D Review

  • Variable low-pass filter (50-250 Hz, 12 dB/octave)
  • Variable subsonic filter (15-40 Hz, 12 dB/octave)
  • Variable Punch bass boost (0-18 dB at 45 Hz)
  • Included wired remote Punch Level Control
  • Class-D amplifier design
  • MOSFET power and output stages
  • Frequency response: 20-250 Hz
  • Preamp-level inputs and outputs

Dimensions  11-1/8"W x 2"H x 7-3/8"D
Number of channels 1
Frequency response 20-250 Hz
Power Handling 
  • 400 watts RMS x 1 at 4 ohms
  • 800 watts RMS x 1 at 2 ohms
  • 1,200 watts RMS x 1 at 1 ohm
Bridgeable N/A
Amplifier Class D

Rockford Fosgate Prime R1200-1D 1-channel amplifier reviewRockford Fosgate is another well-established brand that makes some great sounding audio gear. Rockford Fosgate has been in business for a very long time and have mastered the art of making quality products.

The R1200-1D is one of the best monoblock amplifiers in Rockford Fosgate “Prime” series of amps. This ultra-efficient mono channel amp can put out up to 400 watts RMS to a 4-ohm sub, but will crank out up to 1,200 Watts when it’s running a 1-ohm subwoofer setup without taxing your vehicle’s electrical system.

This mono channel amp was designed to quickly respond to the peak demands that you may throw at your system without giving out. Its frequency response (20-250 Hz) was optimized exclusively for use with subwoofers. So, if you’ve got some power-hungry sub that requires a ton of power to produce louder and clear bass, then the R1200-1D is your guy.

To let you tune your subs for maximum performance, this amp comes with low-pass and subsonic filters, as well as Rockford Fosgate’s famous Punch bass boost. Additionally, you can hook up an optional wired remote knob to get fingertip control over this amp’s bass impact.

3- Alpine MRV-M500 Amp Review

  • Variable low-pass filter (50-400 Hz, 24 dB/octave)
  • Variable bass boost (0-12 dB at 50 Hz)
  • Class D amp with MOSFET power supply
  • Preamp and speaker-level inputs
  • Preamp outputs
  • Remote Sensing automatic turn-on when using speaker-level inputs
  • Optional RUX-KNOB.2 wired remote level control
  • Gold-plated screw terminals

Dimensions  8-1/4"W x 2-3/16"H x 7-15/16"D
Number of channels 1
Frequency response 20 Hz - 20 kHz
Power Handling 
  • 300 watts RMS x 1 at 4 ohms
  • 500 watts RMS x 1 at 2 ohms
Bridgeable N/A
Amplifier Class D

 Alpine MRV-M500 Mono-Channel amplifier reviewIf you’re looking for a powerful, compact monoblock amplifier that deosn’t cost an arm and a leg, then the Alpine MRV-M500 is a great option to consider.

Alpine designed this compact powerhouse amp to make it easier for your to get great bass in you vehicle without sacrificing a lot of space — it’s got less than an 8″ by 8″ footprint and it’s just over 2″ tall — which makes it suitable for compact cars.

This little powerhouse is quite powerful. It can put out up to 500 watts RMS to your sub, guaranteeing some punchy, booming bass on your drive.

The MRV-M500 uses Class D circuitry design which makes it quite efficient. It also uses a technology called ESP (Enhanced Shutdown Performance), which prevents the amp from overheating after it’s been playing at its limits for too long. This technology rolls back the output a bit when the amp is about to overheat. This way the amp keeps playing your music, until it cools enough to return to full power.

This monoblock amp comes with a low-pass filter which lets you keep high frequencies away of your subs, for a well-refined bass. It also has a a bass boost which lets you apply plenty of low-end punch. Additionally, this amp is featured with preamp- and speaker-level inputs, so you can pair it up to almost any vehicle, even one with a stock receiver.

You can also add a remote bass knob to this amp to conveniently adjust bass levels from your dash on the fly.

4- JL Audio JX500/1D Review

  • Class D amplifier design
  • MOSFET switching power supply
  • Frequency response: 10 Hz - 150 Hz
  • Variable low-pass filter (50-200 Hz, 12 dB/octave)
  • Variable bass boost (0-12 dB at 45 Hz)
  • Optional wired remote level control
  • Preamp inputs and outputs
  • Speaker-level inputs

Dimensions  7-7/8"W x 2-1/8"H x 7-11/16"D
Number of channels 1
Frequency response 20 Hz - 20 kHz
Power Handling 
  • 300 watts RMS x 1 at 4 ohms
  • 500 watts RMS x 1 at 2 ohms
Bridgeable N/A
Amplifier Class D

Jl Audio Jx500/1d Mono Channel amplifier reviewJL Audio is a brand we haven’t come across very much at all, but we were quite impressed when we did. JL Audio is building a solid reputation in the car audio industry.

The JL Audio JX500/1D is one of the top rated monoblock amps out there. This ultra-compact can send up to 500 watts RMS to your subwoofer at 2 ohms load, so you can fill your ride with thunderous bass.

This mini mono channel amp is featured with a variable low-pass filter which gives you the control over the frequencies that pass through. It also comes with a bass boost to let you apply plenty of low-end punch. Furthermore, you can add an optional remote level control to this amp to let you turn the sub up or down on the go from the front seat.

To ensure an excellent heat management, this amp has a high-mass aluminum heatsink which keeps the internal parts of the amps cool enough to eliminate thermal shut-downs.

As with all the monoblock amps we listed here, this JL Audio features preamp inputs and outputs as well as speaker-level inputs. This means you can hook it up to most car stereos out there.

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