Best Monoblock Amplifiers for Your Vehicle

Buying an amplifier for your car audio system can be a daunting task especially if you're new to the industry and have no experience in this field.

So, if you're a newbie, the first thing to do is to read our unrivaled car amplifier buying guide in which we explained in details all the relevant specifications and guidelines of how to choose the best amplifier for your vehicle.

Best Monoblock Amp

Car amplifiers are definitely part of the picture if you want your music to be loud. Also, because subwoofers require significantly more power than an aftermarket or factory-installed receiver can provide, a separate amp is a necessity.

External car amplifiers are categorized by the number of channels. In other terms, the number of speakers they can power simultaneously. There are multi-channel and mono channel amps. For the purpose of this article, we'll be reviewing a few of the best monoblock amps on the market.

Unlike multi-channel amplifiers that can power an entire audio system, monoblock amps are designed primarily for subwoofers. Many mono-channel car amps use class D circuitry, which makes them energy and heat efficient. Class D amplifiers tend to distort at high frequencies, but this is not usually an issue when they are used to power subwoofers.

So what are the best monoblock amps out there. Let's take a look. 

7 Best Monoblock Amplifiers Reviewed

POPULAR
Rockford Fosgate Prime 750 Watt Class D 1 channel Amplifier
Rockford Fosgate Punch P1000X1BD 1000 Watt Class-bd Mono Amplifier
Pioneer GM-D9701 2400W Max 1-Channel GM Digital Champion Series Class-D Monoblock Car Audio Stereo Amplifier w/Wired Bass Boost Remote and Free Alphasonik Erabuds
BEST CHOICE
Kenwood KAC-M3001 600W Class D Monoblock Compact Digital Car/ATV/Marine Certified Amplifier
HD1200/1 - JL Audio Monoblock 1200W Subwoofer Speaker Amplifier
Rockford Fosgate Prime 750 Watt Class D 1 channel Amplifier
Rockford Fosgate Punch P1000X1BD 1000 Watt Class-bd Mono Amplifier
Pioneer GM-D9701 2400W Max 1-Channel GM Digital Champion Series Class-D Monoblock Car Audio Stereo Amplifier w/Wired Bass Boost Remote and Free Alphasonik Erabuds
Kenwood KAC-M3001 600W Class D Monoblock Compact Digital Car/ATV/Marine Certified Amplifier
HD1200/1 - JL Audio Monoblock 1200W Subwoofer Speaker Amplifier
Number of Channels : 1
Number of Channels : 1
Number of Channels : 1
Number of Channels : 1
Number of Channels: 1
Class : Class D
Class : BD
Class : D
Class : D
Class: D
Rated Power @ 4-Ohm : 250 watts RMS x 1, @ 2-Ohm : 500 watts RMS x 1, @ 1-Ohm : 750 watts RMS x 1
Rated Power @ 4-Ohm : 300 watts RMS x 1, @ 2-Ohm : 600 watts RMS x 1, @ 1-Ohm : 1000 watts RMS x 1
Rated Power @ 4-Ohm : 500 watts RMS x 1, @ 2-Ohm : 800 watts RMS x 1 ,@ 1-Ohm : 1200 watts RMS x 1
Rated Power @ 4-Ohm : 200 watts RMS x 1 , @ 2-Ohm : 300 watts RMS x 1
Rated Power @4 Ohms: 1200 watts x 1 , @3 Ohms: 1200 watts x 1 , @2 Ohms: 1200 watts x 1 , @1.5 Ohms: 1200 watts x 1
Frequency response : 20 - 250 Hz
Frequency response : 20-250 Hz
Frequency response : 10 - 240 Hz
Frequency response : 20 - 200Hz
Frequency Response: 50 – 500 Hz
Variable low-pass filter :50-250 Hz, 12 dB/octave
Variable low-pass filter filter : 50-250 Hz, 12 dB/octave
Variable low-pass filter : 40-240 Hz, 12 dB per octave
Variable low-pass filter : 50-200 Hz, 24 dB/octave
Adjustable low-pass filter : 50 – 500Hz, at 24dB per octave)
Variable subsonic filter :15-40 Hz, 12 dB/octave
Selectable subsonic filter : 28Hz, 12 dB/octave
Selectable subsonic filter: N/A
Selectable subsonic filter : : N/A
Selectable subsonic filter : N/A
Variable Punch bass boost : 0-18 dB at 45 Hz
Variable PEQ2 bass boost : 0-18 dB at 45 Hz
Wired remote control adjusts variable bass boost : 0-18 dB at 50 Hz
Variable PEQ2 bass boost: N/A
Variable PEQ2 bass boost: N/A
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POPULAR
Rockford Fosgate Prime 750 Watt Class D 1 channel Amplifier
Rockford Fosgate Prime 750 Watt Class D 1 channel Amplifier
Number of Channels : 1
Class : Class D
Rated Power @ 4-Ohm : 250 watts RMS x 1, @ 2-Ohm : 500 watts RMS x 1, @ 1-Ohm : 750 watts RMS x 1
Frequency response : 20 - 250 Hz
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
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Rockford Fosgate Punch P1000X1BD 1000 Watt Class-bd Mono Amplifier
Rockford Fosgate Punch P1000X1BD 1000 Watt Class-bd Mono Amplifier
Number of Channels : 1
Class : BD
Rated Power @ 4-Ohm : 300 watts RMS x 1, @ 2-Ohm : 600 watts RMS x 1, @ 1-Ohm : 1000 watts RMS x 1
Frequency response : 20-250 Hz
Variable low-pass filter filter : 50-250 Hz, 12 dB/octave
Selectable subsonic filter : 28Hz, 12 dB/octave
Variable PEQ2 bass boost : 0-18 dB at 45 Hz
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Pioneer GM-D9701 2400W Max 1-Channel GM Digital Champion Series Class-D Monoblock Car Audio Stereo Amplifier w/Wired Bass Boost Remote and Free Alphasonik Erabuds
Pioneer GM-D9701 2400W Max 1-Channel GM Digital Champion Series Class-D Monoblock Car Audio Stereo Amplifier w/Wired Bass Boost Remote and Free Alphasonik Erabuds
Number of Channels : 1
Class : D
Rated Power @ 4-Ohm : 500 watts RMS x 1, @ 2-Ohm : 800 watts RMS x 1 ,@ 1-Ohm : 1200 watts RMS x 1
Frequency response : 10 - 240 Hz
Variable low-pass filter : 40-240 Hz, 12 dB per octave
Selectable subsonic filter: N/A
Wired remote control adjusts variable bass boost : 0-18 dB at 50 Hz
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BEST CHOICE
Kenwood KAC-M3001 600W Class D Monoblock Compact Digital Car/ATV/Marine Certified Amplifier
Kenwood KAC-M3001 600W Class D Monoblock Compact Digital Car/ATV/Marine Certified Amplifier
Number of Channels : 1
Class : D
Rated Power @ 4-Ohm : 200 watts RMS x 1 , @ 2-Ohm : 300 watts RMS x 1
Frequency response : 20 - 200Hz
Variable low-pass filter : 50-200 Hz, 24 dB/octave
Selectable subsonic filter : : N/A
Variable PEQ2 bass boost: N/A
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HD1200/1 - JL Audio Monoblock 1200W Subwoofer Speaker Amplifier
HD1200/1 - JL Audio Monoblock 1200W Subwoofer Speaker Amplifier
Number of Channels: 1
Class: D
Rated Power @4 Ohms: 1200 watts x 1 , @3 Ohms: 1200 watts x 1 , @2 Ohms: 1200 watts x 1 , @1.5 Ohms: 1200 watts x 1
Frequency Response: 50 – 500 Hz
Adjustable low-pass filter : 50 – 500Hz, at 24dB per octave)
Selectable subsonic filter : N/A
Variable PEQ2 bass boost: N/A
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Unlike multi-channel amplifiers that can power an entire audio system, monoblock amps are designed primarily for subwoofers. Many mono-channel car amps use class D circuitry, which makes them energy and heat efficient. Class D amplifiers tend to distort at high frequencies, but this is not usually an issue when they are used to power subwoofers.

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

Rockford Fosgate offers a wide range of various car amplifiers. Their amps come in three categories labeled "Prime", "Punch" and "Power". The "Prime" series are RF's entry level amps, while the "Power" series subs are RF's high-end amplifiers. "Punch" series amps are in between. They represent the perfect mix of power and price.

Rockford-Fosgate-R750-1D Review

Rockford Fosgate car amplifiers seem to hit the sweet spot for a lot of guys, probably because they are in more of a low-mid price range. RF amps are no joke and are highly recommended to those looking for great quality equipment at an affordable price.

The R750-1D is one of the best mono channel amplifiers that Rockford Fosgate has to offer. This class D amplifier has plenty of power to offer despite its relatively small size.

It can put out 250 watts RMS to a 4-ohm sub, but will crank out more than 750 watts RMS when it's running a 1-ohm subwoofer setup. It's optimized for subwoofers with the implementation of an infrasonic filter to filter out and keep the inaudible ultra-low frequencies from damaging your subwoofers.

Additionally, its low-pass and subsonic filters, along with Rockford Fosgate's famous Punch bass boost, let you tune your subs for maximum performance.

Additionally, its low-pass and subsonic filters, along with Rockford Fosgate's famous Punch bass boost, let you tune your subs for maximum performance.The remote bass level control knob allows you to control and manage your bass level on the go from the driver's seat.

Rockford Fosgate R750-1D Specifications

  • Number of Channels : 1
  • Class : Class D
  • Rated Power 
    • @ 4-Ohm : 250 watts RMS x 1
    • @ 2-Ohm : 500 watts RMS x 1
    • @ 1-Ohm : 750 watts RMS x 1
  • Frequency response :  20 - 250 Hz
  • Features
    • 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)
    • Preamp-level inputs and outputs

PROS

  • Protected from thermal, over-current, and short circuits
  • Protected from thermal, over-current, and short circuits
  • Small and compact 

CONS

  • Pricey

This is another great monoblock amplifier by Rockford fosgate. It's the top performing mono amp in RF's Punch series.

This beast can put out up to 1000 watts at 1 ohm, which is a ton of wattage to power your subs and turn your ride into a rolling thunderstorm of bass that shakes the ground.

Even at 4 ohms, this amplifier can still put out up to 300 watts RMS.

Rockford P1000X1BD Monoblock Amp

The P1000X1BD mono channel amp comes with a low-pass and subsonic filters. It also comes with Punch bass boost so you can easily add some of that boom into the mix whenever you feel it's needed.

Rockford Fosgate went a step ahead and packed this amplifier with their exclusive C.L.E.A.N. technology (Calibrated Level Eliminates Audible Noise) — which is in its simplest form a LED indicator system that ensures your music sounds as clean and powerful as possible. It works as follows :

  • Play the setup tone on the included test CD
  • Adjust the receiver volume until a red clip light on the amp goes out
  • Then turn the amp gain up until a blue light comes on
  • Once the Blue light comes on, your amplifier is matched to your headunit's output.

If I had to pick some criticisms for this mono channel amplifier it would be the price. It's actually the most expensive pick of the lot by far. However, it's very well-engineered and would a great investment for anyone who's looking for a solid monoblock amplifier with a ton of power output.

Rockford P1000X1BD Specifications

  • Number of Channels : 1
  • Class : BD
  • Rated Power 
    • @ 4-Ohm :  300 watts RMS x 1
    • @ 2-Ohm :  600 watts RMS x 1
    • @ 1-Ohm : 1000 watts RMS x 1
  • Frequency response :  20-250 Hz
  • Features
    • Variable low-pass filter filter (50-250 Hz, 12 dB/octave)
    • Selectable subsonic filter (28Hz, 12 dB/octave)
    • Variable PEQ2 bass boost (0-18 dB at 45 Hz)
    • Preamp inputs and outputs
    • Speaker-level inputs
  • PROS

    • Future-proof 
    • Dedicated subwoofer and speaker channels
    • CLEAN feature for easy set-up 

    CONS

    • Very, very, very expensive

    We've reviewed a ton of Pioneer product on this site before, and story hasn't changed. Pioneer makes some of the leading products in the car audio industry.

    The GM-D9601 is one of the best mono channel amps that Pioneer has to offer. It can send up to 1200 watts RMS to your subs, which is plenty of power to get you and your car rockin'.

    Pioneer GM-D9601 Monoblock Amp

    It uses class D technology, which makes it highly efficient both in terms of power and heat dissipation.

    This beast can handle a 1-ohm load without breaking a sweat. It comes with an adjustable LPF (low-pass filter) that you can use to fine tune audio frequencies to better match the characteristics of your subwoofer and listening preferences.

    It also comes with a wired bass boost remote control for optimal bass level adjustment.

    Pioneer GM-D9601 Specifications

    • Number of Channels : 1
    • Class : D
    • Rated Power 
      • @ 4-Ohm :   500 watts RMS x 1
      • @ 2-Ohm :   800 watts RMS x 1
      • @ 1-Ohm : 1200 watts RMS x 1
    • Frequency response :  10 - 240 Hz
    • Features
      • Variable low-pass filter (40-240 Hz, 12 dB per octave)
      • Wired remote control adjusts variable bass boost (0-18 dB at 50 Hz)
      • Preamp inputs and outputs and Speaker-level inputs

    PROS

    • Virtually overheating-proof 
    • Easy to install 
    • Compact but powerful 

    CONS

    • Remote control leaves a lot to be desired 

    If you don't want neither to sacrifice your available cargo space, nor to shell out hundreds of dollars for a mono channel amp, then the Kenwood KAC-M3001 is for you. It's one of the best monoblock amps under $100.

    The Kenwood KAC-M3001 is one of the best, yet reasonably priced compact mono channel amps out there.

    Kenwood KAC-M3001 Amplifier

    This versatile monoblock amplifier can fit even the most limited installation areas. It's designed to withstand harsh outdoor environment, which is makes it a great choice for not only cars, but also for boats, AVTs, and motorcycles.

    This multi-application amplifier uses a conformal coated main PCB (printed circuit boards) which offer extra layers of protection to help prevent moisture or damp air from damaging its internal components.

    Despite its small size, this amplifier packs a lot of power in a small package. At 4 ohms, the KAC-M3001 can put out 200 watts RMS, while at 2 ohm, it can deliver up to 300 watts RMS.

    Kenwood KAC-M3001 Specifications

    • Number of Channels : 1
    • Class : D
    • Rated Power 
      • @ 4-Ohm :  200 watts RMS x 1
      • @ 2-Ohm :  300 watts RMS x 1
    • Frequency response :  20 - 200Hz
    • Features
      • Variable low-pass filter (50-200 Hz, 24 dB/octave)
      • Preamp and speaker-level inputs

    PROS

    • Built specifically for use in tight areas with limited space 
    • Multiple protections against extreme moisture
    • Comes with wire harness 

    CONS

    • No bass boost

    This monoblock amplifier comes from one of the pioneers of the industry which ensures its superior quality and performance.

    The JL Audio HD 1200/1 is a beast of an amplifier despite its tiny size. It is capable of putting out a steady 1200 watts RMS from 1.5 Ohms to 4 Ohms; something that it has managed to do due to its intelligent and energy-efficient power supply.

    JL Audio HD 1200/1 Amplifier

    This, along with its Single Cycle Control technology, enables it to minimize distortion and deliver nearly perfect-quality audio.

    What’s more is that it features a fully adjustable frequency selection, ranging from 50Hz to 500Hz; something which the optional wired remote can fully control. It features both a variable high-pass filter and a variable low-pass filter, allowing you to fine-tune your audio to your preference.

    It features a heavy-duty aluminum alloy heatsink for optimal heat dissipation, preventing it from overheating and allowing it to optimize its performance.

    The only downside with the JL Audio HD 1200/1 is that it’s much more expensive compared to the other ones on this list. Nevertheless, despite its higher price tag, its ability to deliver crisp clear sounds with such immense power is why it is part of our top 7 best monoblock amplifier reviews.

    JL Audio HD 1200/1 Specifications

    • Number of Channels: 1
    • Class: D
    • Rated Power
    • @4 Ohms: 1200 watts x 1
    • @3 Ohms: 1200 watts x 1
    • @2 Ohms: 1200 watts x 1
    • @1.5 Ohms: 1200 watts x 1
    • Frequency Response: 50 – 500 Hz
    • Features:
    • Adjustable high-pass filter ( 50 – 500Hz, at 24dB per octave)
    • Adjustable low-pass filter ( 50 – 500Hz, at 24dB per octave)
    • Preamp outputs and inputs

    PROS

    • Easy installation 
    • Premium-quality cables
    • Huge dampening factor 
    • Rock-solid specifications 

    CONS

    • Made in China

    Comparable to the amps made by Rockford Fosgate and Kicker, the Rockville dB14 is designed to be 2-ohm stable-- it’s capable of producing more power without any problems. It has a capacity of putting out 2000 watts RMS at 2 Ohms and 1200 watts RMS at 4 Ohms.

    It also features a professional peak limiter circuitry that allows for music playback free from distortion on every level.

    Rockville DB14 Mono Amp

    In addition to these, the Rockville dB14 features a mute and delay soft start technology which protects your speakers and amplifier from the effects of inrush currents. It also has a phase control switch that ensures the bass from your subwoofer doesn’t cancel out the bass from your speakers.

    Additional features include a protective mode that protects both the subs and amp from overheating, especially when used with an incompatible set-up. While this can be useful, it also requires more mindfulness on the user’s part.

    Rockville dB14 Specifications

    • Number of Channels:1
    • Class: D
    • Rated Power
    • @4 Ohms: 1200 watts x 1
    • @2 Ohms: 2000 watts x 1
    • Frequency Response: 15Hz – 250Hz
    • Features:
    • Low-pass filter ( 50 – 250Hz)
    • Subsonic filter ( 15 – 55Hz)

    PROS

    • Good construction quality 
    • The circuitry is protected from overvoltage 
    • Highly-efficient high-speed MOSFET supply 

    CONS

    • Included installation and operation manual could use some improvement 
    • A bit pricey 

    With its capacity to produce a maximum of 2400 watts or 1200 watts RMS at 1 Ohm, the Hifonics ZRX2416.1D is perfect for powering even the most challenging subwoofers. Not only does it deliver power, but it also delivers superior sound quality as well.

    In addition, it has a 4-way protection circuitry: thermal, speaker short, DC, and power overload protection.

    Hifonics ZRX2416.1D Monoblock

    It also includes a remote bass control, allowing users to change bass levels even while on the go. The combination of its military-grade PCB construction and aluminum alloy heat sink allows for heavy-duty usage.

    Hifonics ZRX2416.1D Specifications

    • Number of Channels: 1
    • Class: D
    • Rated Power
      • @4 Ohms: 325 watts x 1
      • @2 Ohms: 650 watts x 1
      • @1 Ohm: 1200 watts x 1
    • Frequency Response: 15Hz – 250Hz
    • Features:
      • Low-pass filter (40Hz-300Hz, at 24 dB per octave)
      • Subsonic filter (10 Hz - 40Hz, at 24dB)

    PROS

    • Has room for additional amplifiers 
    • Multiple layers of protection 
    • On-board system diagnostics 

    CONS

    • Installation is not DIY friendly 

    The JL Audio Slash Series 1200/1v3 mono-channel amplifier can reach up to 600 watts RMS and is compatible with a wide variety of systems. But, what really sets this amplifier apart is what JL Audio refers to as the “Regulated Intelligent Power Supply” technology that allows the amplifier to maintain its power output consistently regardless of its battery voltage and load impedance. 

    JL Audio Slash Series 1200/1v3

    Of course, this amplifier isn’t for everybody. The price pretty much guarantees that.  

    Then again, this is a list of the best monoblock amplifiers today, which means that our recommendations are for those who aren’t willing to settle for less.   

    If you’re a car audio enthusiast looking for premium sound quality and top-of-the-line features, then this is for you.

    JL Audio Slash Series 1200/1v3 Specifications 

    • Number of Channels: 1 
    • Class: D 
    • Rated Power :
    •                   @4 Ohms: 1200 watts x 1 
    •                  @2 Ohms: 1200 watts x 1 
    •                 @1 Ohm: 1200 watts x 1 
    • Frequency Response: 40Hz – 200Hz 
    • Features: 
    •               4-gauge power and ground leads and a 100-amp fuse recommended 
    •               Parametric EQ bass boost (0-15 dB at 20-80 Hz)

    PROS

    • Virtually alternator-noise free 
    • Multiple differential and well-balanced line inputs to choose from
    • Works with stock audio units 
    • Available wired remote 

    CONS

    • Tedious set-up process
    • Not for compact spaces 
    • Software isn't too advanced, compared to more superior Double DIN units, but it gets the job done!

    Built specifically for those earth-shattering subwoofers, the Rockford Fosgate R500XD is for bass heads.  

    The sound quality of the R500XD is phenomenal and paired with its unique look, it’s the sort of amplifier that you won’t hesitate to show off if necessary.

    You definitely won’t be hearing much distortion or clipping with the R500XD if any at all.

    Rockford Fosgate R500XD

    Plus, because it has a cast-aluminium heat sink on top of its thermal sensing technology, this amplifier won’t run too hot at all.  

    Save for Rockford Fosgate’s decision to angle the wiring screws in a weird way, making tight installations difficult, the R500XD is virtually perfect.  

    Rockford Fosgate R500XD:  

    • Number of Channels: 1 
    • Class: D 
    • Rated Power :
    •              @2 Ohms: 500 watts x 1 
    •              @1 Ohm: 300 watts x 1 
    • Frequency Response: 20Hz – 250Hz 
    • Features: 
    •            Onboard 12dB/octave LP/HP/AP crossover & Infrasonic filter 
    •            On-board Punch EQ with +18dB boost at 45Hz 

    PROS

    • Thermal-sensing technology
    • Minimal clipping and distortion 
    • Aesthetically pleasing 
    • Impressive sound quality 

    CONS

    • Max sound output could be better (500 watts only) 
    • Power-hungry

    Arguably the best entry-level monoblock amplifier on our list, the Planet Audio Pulse PL1500.1M costs only around half or even less than what the others on our list sell for and comes with 1500 watts of power with class A/B sound quality and efficiency.  

    Featuring both high-level and low-level inputs, the PL1500.1M also has a variable low-pass crossover and a switchable bass boost and variable gain control.  

    Planet Audio PL1500.1M

    While the PL1500.1M isn’t exactly compact by any means, it’s also not obnoxiously large either. This makes it an easy fit for all but the tightest and most cramped spaces.  

    To top it all off, it’s backed by a 6-year platinum online dealer warranty if purchased via Amazon. That’s a pretty solid guarantee right there all things considered.  

    Planet Audio P1500.1M Specifications: 

    • Number of Channels: 1 
    • Class: A/B 
    • Rated Power 
    •       @2 Ohms: 1500 watts x 1 
    •       @4 Ohm: 750 watts x 1 
    • Frequency Response: 35Hz – 160Hz 
    • Features: 
    •      Class A/B Topology 
    •      Low & High Level Inputs 
    •      Switchable bass boost

    PROS

    • Affordable 
    • 6-year warranty 
    • Perfect size 

    CONS

    • Prone to overheating

    Conclusion 

    It’s not easy to buy a car amplifier. Even seasoned car audio enthusiasts have a hard time doing it. It also certainly doesn’t help that any given manufacturer could have at least a dozen or so of amplifiers, each of which look like they’re worthy of purchasing.   

    With that said, we’re hoping that we were able to clear things up with our article.  

    If, after reading this, you’re still unsure of what to buy, you at least know by now what monoblock amplifiers are good and which ones aren’t. Happy shopping! 

    Last update on 2020-10-28 / Affiliate links / Images from Amazon Product Advertising API