Car Amplifier Lists

Best Monoblock Subwoofer Amplifiers in 2024

Best Monoblock Subwoofer Amplifiers in 2024

Why Trust Our Opinion on Car Amplifiers?

CarAudioNow is an award winning automotive blog, founded and built from the ground up by car enthusiasts over a decade ago. Between our editor, Kameron, and a few selected qualified writers, we’ve installed and tested a wide variety of car amplifiers in cars or our test bench in person. We know our amps, how they should sound and perform at high volume, what type of tuning and control features they should have (like a built-in DSP). But we also know what’s a good value for your dollar. We get our hands on every product that we test in person too – many of which are purchased and some provided by a manufacturer. Its a combination of these tests and extensive research that lead us to our recommendations though. And we’re frequently testing new amplifiers for our lists.

CarAudioNow and its writers also don’t use AI to throw regurgitated information about a few car amplifiers on a list and say they’re “the best” or “our top pick”. We’re focused on providing meaningful lists, with accurate and practical info that will help you make an informed decision. We do this because we genuinely enjoy or highly regard the products we add to our lists. Our readers and our reputation are both more important to us than a quick buck or our ranking on Google – although both of those would be nice! Read more about how we choose our top lists here.

In this article: We'll review our top pick monoblock subwoofer amplifier picks that'll make your subwoofer slam, with quick reviews, photos and price comparisons of each to help you save money.

When you are ready to add thunderous bass to your car audio system, it’s time to invest in a monoblbock amplifier to power your subwoofers. A monoblock amp meets the specific requirements of a subwoofer without compromise. The circuitry of a mono amp creates power for low frequencies. A good mono amplifier can handle all the power without overheating.

The most challenging part of buying a new mono amplifier is sifting through the dozens of products on the market today. It can be hard to distinguish between quality amplifiers and those which are just marketing hype. When you buy an amp for your subs, you need power and performance, but it doesn’t have to cost an arm and a leg. We put this list of top performing monoblock amplifiers to help you focus your search and find the right product for your system.

Best Overall Subwoofer Amplifier

Rockford Fosgate Prime Series

Rockford Fosgate PRIME Series Amplifier Review

The Rockford Fosgate PRIME-series of amplifiers continues to improve year after year. The series includes amplifiers pushing 1200 w, 750 w, 500 w, and 250 w. All are Class-D for maximum efficiency and low operating temperature.

Rockford Fosgate engineers these amps to handle low-frequency with plenty of power. The circuitry is specially designed to ease gain setting and provide big bass. In fact, RF says the design produces three times the bass of competitor models due to the integrated Punch EQ. Remote level control and an infrasonic filter make it simple to get the sound you want.

Our pick for a great setup is the Rockford Fosgate PRIME R2-500X1. Each amplifier from RF includes a “birth certificate” demonstrating the actual power output of each amp. These amplifiers regularly exceed the rated power significantly.

Key Features
  • Class-D Amplifier
  • 1200, 750, 500, and 250 watt variations
  • Switchable 4 ohm, 2 ohm, 1 ohm
  • C.L.E.A.N. circuitry
  • P.O.W.E.R. supply generator
  • Overheat, overload, and short protected
  • Frequency Response: 20-250 Hz
Reasons to Buy
  • Durable amp
  • Options to meet the needs of any system
  • Low operating temperature
Reasons Not to Buy
  • Frequently sold out
Rockford Fosgate R2-250X1 top view with control panel
R2-250X1

Power Handling: 150W RMS 4Ω, 250W RMS 2Ω

Price Comparison

Rockford Fosgate R2-500X1 top view of controls
R2-500X1

Power Handling: 300W RMS 4Ω, 500W RMS 2Ω

Price Comparison

Rockford Fosgate R2-750X1 top view
R2-750X1

Power Handling: 250W RMS 4Ω, 500W RMS 2Ω, 750W RMS 1Ω

Price Comparison

Rockford Fosgate R2-1200X1 top view with panel
R2-1200X1

Power Handling: 400W RMS 4Ω, 800W RMS 2Ω, 1200W RMS 1Ω

Price Comparison

Best 1 Ohm Monoblock Car Amplifier

Hifonics Brutus Gamma BG-Series

Hifonics Brutus Gamma Series Monoblock amplifiers

Hifonics Brutus Gamma BG Series Amplifier Review

Clever marketing often hides garbage products, so with a slogan like “Power From the Gods,” it’d be easy to not take Hifonics seriously. What a mistake that would be, because the Brutus Gamma BG-series of monoblock amplifiers are some of the best you will find. The series is available with power ratings of 3300 watts, 2500 watts, 2200 watts, 1900 watts, and 1300 watts. All are Super Class-D amplifiers offering superior efficiency and power.

Hifonics intends these amps to be run at 1 ohm, so they built them tough and efficient. Even after hours of use, the chassis is cool to the touch. If you need a durable amp, pick up a Hifonics Brutus BG-Series.

Most people will find the BG-1300 to be excellent for everyday use, but most modern cars with high-output alternators should be able to run the BG-1900 for even higher levels of power.

Key Features
  • Super Class-D amplifier
  • Simpatico Coil Design for constant voltage protection
  • Aluminum heat sink
  • Short and overload protection
  • Wired remote
  • Frequency: 10-500 Hz
Reasons to Buy
  • Durable amplifier
  • Exceeds advertised power in many cases
Reasons Not to Buy
  • Some quality control issues reported
Hifonics BG-1300.1D main image with logo
BG-1300.1D

Power Handling: 325W RMS 4Ω, 650W RMS 2Ω, 1300W RMS 1Ω

Price Comparison

Hifonics BG-19001D main
BG-1900.1D

Power Handling: 475W RMS 4Ω, 950W RMS 2Ω, 1900W RMS 1Ω

Price Comparison

Hifonics BG-2500.1D main with logo
BG-2500.1D

Power Handling: 625W RMS 4Ω, 1250W RMS 2Ω, 2500W RMS 1Ω

Price Comparison

Hifonics BG-3300.1D main image front view
BG-3300.1D

Power Handling: 825W RMS 4Ω, 1650W RMS 2Ω, 3300W RMS 1Ω

Price Comparison

Runner Up, Best 1-Ohm Subwoofer Amplifier

Skar Audio RP Series

Skar Audio RP Series Amps

Skar Audio RP Series Amplifier Review

Florida-based Skar Audio has a reputation for building tough car audio equipment. If you are looking for a potent amplifier that won’t break the bank, the RP-series will get you the power you need. These amplifiers are all Class-D rated for efficient power use. The RP-Series of monoblock amplifiers are available in numerous power ratings including wattages of 350, 800, 1,200, 1,500, 2,000, 3,500, and 4,500. That’s enough options to get tremendous power for any system.

The Skar Audio RP-1200 makes an ideal daily driver amplifier for pumping up the bass. At 1 Ohm, this amp will peak around 1,600 watts. That’s plenty of power to drive a big single or two moderately-sized subs. The RP-1200 uses a MOSFET power supply for voltage stability and four-way circuit protection to prevent damage from shorts, overheating, and other faults.

Key Features
  • Class-D amplifier
  • Wide range of wattage
  • MOSFET power supply
  • Frequency response: 20-250 Hz
  • 4 Gauge power and ground
Reasons to Buy
  • Affordable and high-quality
  • 1 Ohm stable design
Reasons Not to Buy
  • Some users experienced premature failure
Skar Audio RP-3501D main
RP-350.1D

Power Handling: 350 Watts RMS 1Ω

Price Comparison

Skar Audio RP-8001D main image top
RP-800.1D

Power Handling: 800 Watts RMS 1Ω

Price Comparison

Skar Audio RP-12001D main
RP-1200.1D

Power Handling: 1200 Watts RMS 1Ω

Price Comparison

Skar Audio RP-15001D main top image
RP-1500.1D

Power Handling: 1500 Watts RMS 1Ω

Price Comparison

Skar Audio RP-2000.1D main
RP-2000.1D

Power Handling: 2000 Watts RMS 1Ω

Price Comparison

Skar Audio RP-3500.1D main top
RP-3500.1D

Power Handling: 3500 Watts RMS 1Ω

Price Comparison

Skar Audio RP-4500.1D main top image
RP-4500.1D

Power Handling: 4500 Watts RMS 1Ω

Price Comparison

Best Subwoofer Amplifier for Easy Tuning

Kicker KX Series Amplifiers

Kicker KX monoblock Amplifiers

Kicker KX Series Amplifier Review

When it comes to getting honest, full bass from your subwoofers, Kicker is a great option. The company is well-known for building durable sound equipment that gets you reliable power. The Kicker KX-Series of amplifiers includes 400 watt, 800 watt, 1,200 watt, 1,600 watt, and 2,400 watt monoblock units. All are Class-D amplifiers that are 1 Ohm stable.

The KX-Series gives you some options that are hard to find on other amps. One of the best and most unique features is a remote control that gives you control over virtually every amp setting. You can control clipping, bass boost, phase and gain using the remote control. Kicker even provides tuning tones specific to your head unit to ensure a perfect match. Another cool feature that's unique to these amps is their light-up gain controls on the control panel. These lights will tell you when the gains are set too high, simplifying the tuning process.

The Kicker KXA1200.1 is a great amp for most drivers. It produces enough power to get deep bass and will work well on most factory vehicles. Invest in high-quality power cables when you install this amp to make sure it get’s the juice it needs.

Key Features
  • Class-D amplifier
  • Light-up gain tuning control
  • One Ohm stable
  • Remote ready
  • FIT+ noise reduction
Reasons to Buy
  • Durable amp with a proven track record
  • Models available for any system
  • Great tuning features that simplify the tuning process
Reasons Not to Buy
  • Not as compact as other designs on our list
Kicker KXA400-1
KXA400.1

Power Handling: 400 Watts 1Ω, 200 Watts 4Ω

Price Comparison

Kicker KXA800-1
KXA800.1

Power Handling: 800 Watts 1Ω, 400 Watts 4Ω

Price Comparison

Kicker KXA1200-1
KXA1200.1

Power Handling: 1200 Watts 1Ω, 600 Watts 4Ω

Price Comparison

Kicker KXA1600-1
KXA1600.1

Power Handling: 1200 Watts 1Ω, 600 Watts 4Ω

Price Comparison

Kicker KXA2400-1
KXA2400.1

Power Handling: 2400 Watts 1Ω, 1200 Watts 4Ω

Price Comparison

Best 1, 2 & 4 Ohm Choice Subwoofer Amplifier

Alpine S2 Series

Alpine S2 Series Best Car Amplifiers

Alpine S2 Series Amplifier Review

Alpine’s monoblock S series amps have been one of our favorites for a few years now, and the next generation S2-series doesn’t change any of the things that we love about the lineup. Alpine only improved upon a solid platform. Among other things, they upgraded the electronics for enhanced durability, modernized the remote turn on selection, and enlarged the case slightly to provide better thermal efficiency. They’re still our budget friendly compact amplifier choice however with a depth of only 2.25 in.

The biggest change comes with the new model lineup. The previous generation offered just one monoblock amp. With the next gen S2 series, you have two options: a 600-watt amp or a 1200-watt amplifier. Both of which can fit in tight quarters to power the subwoofer of your choice.

Alpine’ S2 amps are Class-D, and like many amps on the market, they have variable low-pass filters and a bass boost function to improve response on the bottom end. They can output power at 1 ohm, 2 ohms or 4 ohms making them flexible to support the power handling of virtually all subs.

Key Features
  • Class-D amplifier
  • 600 W or 1,200 W options
  • Variable low-pass filter and bass boost
  • Preamp and speaker level inputs
  • Optional wired remote
Reasons to Buy
  • The expanded lineup offers better options for finding the perfect amp for any system
  • Works perfectly with Alpine Halo subs to generate huge bass
Reasons Not to Buy
  • The optional controller is important but not included
Alpine S2-A60M angle
Alpine S2-A60M

Power Handling: 600 Watts @ 1Ω, 600 Watts @ 2Ω, 330 Watts @ 4Ω

Price Comparison

Alpine S2-A120M angle
Alpine S2-A120M

Power Handling: 1200 Watts @ 1Ω, 1200 Watts @ 2Ω, 600 Watts @ 4Ω

Price Comparison

Best Class BD Subwoofer Amplifier

Rockford Fosgate POWER T Series

Rockford Fosgate Power T Series

Rockford Fosgate Power T Series Amplifier Review

Finding room for an amp is a frequent issue when installing a big system. When the Rockford Fosgate engineers set out to design the T-Series, they found innovative ways to cram all the power you could ever need into a case that will fit anywhere. And when we say anywhere, these amps can even be installed on motorcycles. How’s that for some boom?

There are lots of options in the T-Series. Choose from 2,500 watts, 1,500 watts, 1,000 watts, 750 watts, and one of two 500 watt amps. These amps are all Class-BD for the super-efficiency of a Class-D amp and the high-quality sound production of a Class-B. The T-Series take advantage of RFs unique Constant Power design that provides as much as 25% more power at the same load as other amps.

The Rockford Fosgate Power T1000-1 is a phenomenal amp for most drivers. This particular amp is fully capable of use in sound competition vehicles, but is an ideal amp for earth-shaking bass even in your daily sedan.

Key Features
  • Class-BD amp for sound quality and efficiency
  • MOSFET power supply and output
  • Punch Bass EQ
  • Compact design is easy to install
Reasons to Buy
  • Consistently exceeds rated RMS power
  • Reliable, even when pushed hard
Reasons Not to Buy
  • Price tag
Rockford Fosgate T500X1br
T500X1br

Power Handling: 500 Watts 1Ω, 300 Watts 2Ω, 175 Watts 4Ω

Price Comparison

Rockford Fosgate T750X1bd
T750X1bd

Power Handling: 750 Watts 1Ω, 750 Watts 2Ω, 500 Watts 4Ω

Price Comparison

Best Low Cost Monoblock Amplifier

Taramps HD-Series

Taramps HD Series Amps

Taramps HD Series Amplifier Review

Taramps is a  Brazillian-based builder of some really fine quality amplifiers. The HD-Series are all Class-D amps and are available in 1 ohm, 2 ohm, and 4 ohm variations. Taramps amps are an excellent choice for providing tons of bass when you have an upgraded electrical system. These amps are power-hungry, and it’s essential to run 0 Gauge power to prevent starving the amp.

All of the HD-Series amps are rated at 3,000 watts when set to the appropriate load. Buy the amp that suits your needs, but also plan on upgrading wiring throughout your system. These are competition-level amps at entry level pricing, but to get the most out of a Taramps amp, you need to supply more than average power. A second battery or upgraded charging system may be necessary to get the sound you want.

Key Features
  • Class-D amplifier
  • 3,000 watts RMS@1 Ohm
  • Frequency response: 10-20k Hz
  • Short/ high or low voltage/ thermal protection
  • Thermostatic fan
Reasons to Buy
  • Excellent power in a small package
  • 1, 2, 4 Ohm design
Reasons Not to Buy
  • In some cases, requires more than factory power
  • Needs oversized power and ground wiring to prevent overheating
Taramps HD 3000 – 4 OHM main
HD 3000 – 4Ω

Power Handling: 3000 Watts 4Ω

Price Comparison

Taramps HD 3000 – 2 OHM main
HD 3000 – 2Ω

Power Handling: 3000 Watts 2Ω, 2025 Watts 4Ω, 1140 Watts 8Ω

Price Comparison

Taramp HD 3000 – 1 OHM main
HD 3000 – 1Ω

Power Handling: 3000 Watts 1Ω, 2025 Watts 2Ω, 1140 Watts 4Ω

Price Comparison

Runner Up, Best Budget Monoblock

Soundstream Tarantula Series

Soundstream Tarantula Series Monoblock subwoofer amplifiers

Soundstream Tarantula Series Amplifier Review

Since 2015, the Tarantula-Series of amplifiers from Soundstream have been rocking audio systems all over. The Tarantula amps are built to handle abuse- there is even a model designed to provide stable power at .5 an Ohm without overheating. Soundstream has made an effort to make these amps more visually attractive by adding custom changeable lighting, but why you should buy this amp has nothing to do with looks. It’s tough, powerful, and affordable.

Soundstream produces a 4,000 watt peak power amplifier perfect for most daily drivers. Make sure to have upgraded wiring, at least a 1 gauge power wire, because this amp is going to need the power. Pair it up with a set of good-quality subwoofers and go on a sound rampage. A 6,000 watt monoblock amplifier is also available when you just simply need to go nuts.

Key Features
  • Class-D Monoblock amplifier
  • MOSFET power supply
  • PC board made from military grade materials
  • Customizable lighting
Reasons to Buy
  • Tons of power
  • Great Value
Reasons Not to Buy
  • Might require modifications to factory charging system to handle the amount of power
  • Power does not exceed ratings like others on our list (doesn't really need to though)
Soundstream t1-4000dl subwoofer amplifier
T1.4000DL

Power Handling: 2000 Watts 1Ω, 1300 Watts 2Ω, 700 Watts 4Ω

Price Comparison

Soundstream T1-6000dl monoblock amplifier
T1.6000DL

Power Handling: 2500 Watts 1Ω, 1400 Watts 2Ω, 800 Watts 4Ω

Price Comparison

Looking for a different type of amplifier? Check out these list!

Conclusion

Any of the amplifiers we detail here are a perfect compliment to your car audio system. It’s important to remember that bigger isn’t always better- you will be happier with your system by purchasing an amplifier that meets the demands of your subwoofers. Each of these amplifiers makes a great choice depending on how you want to design your system.

FAQ

How do I choose the right car subwoofer amplifier for my system?

Every system is different. Depending on the subwoofer you are powering, we recommend matching the amplifier's power requirements of your subwoofer, the impedance (ohms) of your subwoofer, ensuring that the dimensions will match the available space in your car, and that the amplifier class aligns with your application.

What is the difference between a mono subwoofer and a multi-channel amplifier

Mono subwoofer amplifiers have a single output and are designed specifically to power subwoofers. Multi-channel amplifiers can typically power both subwoofers and other speakers, such as tweeters and mid-range drivers. Some multi-channel amplifiers have a dedicated output channel for subwoofers in addition to speaker channel outputs, for example 5 channel amps.

How does the power rating of a subwoofer amplifier affect performance?

A subwoofer amplifier's power determines the maximum output it can provide to the sub. A higher power rating can result in louder and more impactful bass, but it's very important to match the power rating of the amplifier to the capabilities of the subwoofer.

Can I use a car subwoofer amplifier with my factory stereo system?

Yes, you can use a subwoofer amplifier if your factory stereo has an included subwoofer. However, in most cases you will require a high-level to low-level converter in order to adapt the signal from your factory subwoofer to your aftermarket subwoofer amplifier. You will also need to ensure that the power output matches your factory subwoofer's power rating and that you set your crossover properly on the amplifier.

What is the importance of a crossover in a car subwoofer amplifier?

Typically subwoofer amplifiers have what's called a low pass filter, aka crossover. Crossovers are essential for limiting and separating the audio signal in order to direct the appropriate frequencies to your sub. It ensures only lower frequency signals, which are typically best handled by the sub, are actually sent to it while higher frequencies are directed only at the speakers. This helps to ensure optimal performance from your subwoofer, amplifier and other stereo components and reduces distortion.

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