Best 1-Ohm Stable Amplifiers Competition Grade [UPDATED]

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In this article, we examined a total of 11 different 1-Ohm stable amps. All of these amps were cherry-picked from suitable amps currently available on the market, based on the thorough analysis of customer reviews, as well as specifications and build quality – if you need more options see our reviews of best car amplifiers.

If you are serious about the competition see these options with 2000 Watts, and 3000 Watts RMS. Also, check out some of the best 1-Ohm subs we recommend.

Recommended 1-Ohm Stable Amps

ImageName1-Ohm Stable (RMS)Other outputS/N Ratio
SFB-1500D - Sundown Audio...
Our Pick

Check Price
1500 W
2 ohm RMS: 1200W
4 ohm RMS: 650W
100 dB
Skar Audio SKv2-1500.1D...
Runner Up

Check Price
1500 W
2 Ohms: 930 W
4 Ohms: 550 W
95 dB
Taramp's MD 1800.1 1 Ohm 1800...
Bang For The Buck

Check Price
1800 W2 OHMS: 1410W88 dB
Genius Audio GHD-3000 Compact...
Most RMS

Check Price
3598 W2 OHMS: 2446W
4 OHMS: 1403W
95 dB
Hifonics ZG-1800.1D Zeus Gamma...

Check Price
1600 W2 OHMS 900W
4 OHMS 450W
Our Pick

Sundown Audio SFB-1500D

RMS @1-Ohm Stable: 1500W
S/N Ratio: 100 dB
Size: 7.25″ x 6.75″ x 2.50″
Class: D

For every car audio enthusiast, the desire for a powerful sound system and great bass delivery often ends at the amplifier. This is what the Sundown Audio SFB-1500D offers, a 1500 watts RMS-sized monoblock amplifier – there is also an option with 3000W.

The amplifier can function across several other impedance levels besides the 1 Ohm where it’s stable at 1500 watts. At 2 Ohms it will require 1200 watts per channel and at 4 Ohms it has an RMS rating of 650 watts per channel.

This is a nice performance and with a great S/N ratio of 100 dB. It also comes with a variable low pass filter of 80Hz-20kHz, a variable High Pass Filter of 15Hz-1kHz, and a bass boost of 0-12 dB at 50Hz.

This amplifier beats the field for its superb sound and safety features. It uses the D- Class circuitry which allows it to have a higher bass response without compromising on the overall sound quality.

The circuit makes use of the Dual MOS-FET technology which is usually employed in music production to achieve a powerful performance without distorting the sound.

The circuitry features a 4-way protection system catering to thermal risks, and voltage and also protects the unit against speaker short and DC offset.

The whole unit is protected by the heavy-duty aluminum alloy vented heat sink. There is an inbuilt system diagnostic application for checking any errors.

All in all, if you’re looking for a 1-ohm stable amp with 1500 Watts, great specs, and a reasonable price our best bet is Sundown Audio SFB-1500D.

Sundown SFB-1500D Amplifier Dyno Test

Runner Up

Skar Audio SKv2-1500.1D

RMS @1-Ohm Stable: 1500W
S/N Ratio: 95 dB
Size: 13.78” x 2.5” x 9.16”
Class: D

This Skar 1-Ohm stable powerhouse of an amplifier is for all those audiophiles who love to compare the sound of their car with other cars and compete against them. Skar has specially designed this mono-block class-D amp to be a competition grade. Its MOSFET construction makes it a reliable option for offering high levels of power output for extended audio sessions.

There is also a 3,500W option for Skar if you need more power!

Besides MOSFET, its 1/0 gauge power and ground input terminals also ensure good power handling with their maximum current flow. It also features a user-adjusted low-pass filter so that you can make the sound smoother by attenuating high harmonics.

This amp also features a bass boost control to ensure the low-end reverbs remain in line with your requirements. Skar has used an advanced heat sink design for this powerful amp to ensure it can continue to work without experiencing overheating.

Skar Audio SKv2-1500.1D Dyno

Most RMS

Genius Audio GHD-3000

RMS @1-Ohm Stable: 3598 W @ 13.8 VDC, 3000 W @ 12.6 VDC
S/N Ratio: 95 dB
Class: D

The Genius GHD-3000 could be your best 1-Ohm stable amp if you are looking for even more power and don’t wanna spend a fortune. At 3598W RMS, this amplifier outperforms all the amps on this list.

Its frequency response is between 10Hz and 15Khz. A high-frequency response often interferes with sound quality. The low-frequency response range on this model means that you stand to get a more balanced sound when it comes to bass and treble.

The amplifier can run on the either high or low voltage at 12.6 and 13.8 VDC, giving users versatility in power output without compromising audio output quality.

The amplifier’s circuitry has a protection system that could be vital in shielding your sound installations from overloads and short-circuiting.

The amp comes with low pass frequency filters that let you increase the output of your speakers between 80Hz – and 15Khz. The tuning prevents distortion by setting maximum level limits for signals.

The unit looks compact and sturdily built. You might, therefore, expect many years of use from this device. It also comes with many input terminals and plugging ports for various connections.

Bang For The Buck

Taramp’s MD 1800.1

RMS @1-Ohm Stable: 1800W
S/N Ratio: 88 dB
Class: D

This is 1-Ohm stable amp by Taramps had made it to our list for various reasons. For starters, it can produce an RMS output of 1600W at 12.6VDC. Then, you can change the voltage to 14.4VDC to get extra 376 RMS power. There is a small display on the top panel where you can see the real-time voltage rating of this mono-block class-D amplifier.

We have also picked this Taramps amp is for its DSP capabilities. This amp digitally processes all the packets of audio information it receives to provide you with a smoother and streamlined output. No matter what type of sub you plug with it, you won’t miss out on any acoustic details.

The DSP-1600.1 also features a patented Smart Cooler that carries out the thermal management of the amp. It activates upon temperature and audio triggers. This feature ensures that you can keep using your powerful mono-block amp without inadvertently damaging it.


Hifonics Zeus ZG-1800.1D

RMS @1-Ohm Stable: 1600W
Frequency Response: 10 Hz – 500 Hz
Size: 8.25″ x 2.375″x 10.5″
Class: D

If you need a mix of power and reliability in a mono-block class-D amp, you can consider this Chilean brand known for making sound equipment. Hifonics has introduced the Zeus ZG-1800.1D which boasts top-of-the-line circuitry.

It features a specialized simpatico coil design with a MOSFET power supply that ensures maximum current passage at a consistent voltage rating and with minimum heat production.

Moreover, there is a low-noise preamp circuit that ensures the input signal enters the amp with minimal distortion. Hifonics has uses top-grade aluminum boasting good conduction as the heat sink. Therefore, you won’t complain about your amp getting overheated after playing a couple of tracks.

We also like this amp for its electronic equalizer with onboard electronic crossover. This feature lets you customize the frequency output to speakers and sub as per your requirements. There is also a wired bass remote control that you can mount anywhere in the car to keep the adjustment of low-end reverbs on your tip.

Everything else we recommend


Planet Audio TR3000.1D Torque

RMS @1-Ohm Stable: 2250 W
Peak @1-Ohm Stable: 3000 W
Class: D

This amplifier is the best cheap 1-ohm stable amp suitable for all vehicles without overwhelming your car’s electrical system and your budget.

It is versatile enough to work on a 4-Ohms subwoofer where it has a power handling of 563 watts RMS. However, it is optimized for the 1-Ohm subwoofer where its full power (2250W) and performance range is realized.

There are a number of features that lend this amplifier its performance levels; a subsonic filter, a variable low pass crossover, a remote subwoofer control, variable gain control, and switchable input sensitivity.

The TR3000.1D is made to offer clear and powerful bass delivery and this is achieved first by the infrasonic filters which protect the subwoofer from ultra-low bass levels which can affect the bass quality distorting the overall sound output.

The only drawback of this amplifier according to different customers is its lack of durability. A number of them also observed that the bass performance levels tended to lose their crisp clear quality at high-performance levels.

Also Great

Massive Audio E2

RMS @1-Ohm Stable: 800W
Frequency Response: 10 Hz – 220 Hz
Size: 8″ x 2.1″x 5.9″
Class: D

If you need a mono-block amp that offers mid-range RMS power as compared to powerful counterparts with 4-digit wattage, this Massive Audio option is worth considering. Like any top-of-the-line class-D amp, Massive E2 boasts a compact footprint, making its installation hassle-free.

Despite being a small-size amp, its heat sink capabilities are quite great. Unless you’re blasting it for hours and hours, Massive Audio E5 doesn’t get overheated.

This class-D amp is great for use with a high-level speaker signal (up to 10V), thanks to its built-in OEM line converters with RCA inputs. Massive Audio E2 also features a built-in noise reduction circuitry. It ensures that you don’t have to compromise on any distortion just because you are using a powerful mono-block amp.

The other thing to like about Massive Audio E2 is its MOSFET circuitry. With MOSFET, you can rest assured that your amp can cleanly and efficiently operate on high currents and temperatures.


Also Great

Rockford Fosgate P500X1BD Punch

RMS @1-Ohm Stable: 500 W
Peak @1-Ohm Stable: N/A
Class: D

Now at 500 W don’t expect the same output volume as with the Genius Audio GHD-3000 seen earlier. But this being a monoblock amplifier, this amount of power could still be considered adequate for your speakers.

On top of that, you might not need a signal converter when working with this amp. Its RCA inputs can accept Hi and Low audio signals, saving you the trouble of acquiring and installing line output converters.

One feature that, in my opinion, sets the Rockford Fosgate P500X1BD amp apart from its peers is the onboard amplifier. This feature gives you more control over the quality of the sound output.

Additionally, with the Butterworths cross over the network, you will have the ability to control the types of frequencies that go to each of your speakers. This feature helps to maximize the amplifier’s power and could also take care of your overheating issues.

The amplifier pushes more than its stated watts. I have used it on a p3 1×10, and it sounds just as good as the other models in the review. You just have to watch out when using the equalizer and gain control. It’s easy to confuse the two.

Marine option

Skar Audio RP-1500.1D

RMS @1-Ohm Stable: 1500 W
Peak @1-Ohm Stable: 1900 W
Class: D

This 1-Ohm stable amplifier from Skar Audio (RP-1500.1D review) was made to deliver great features at a reasonable price and it did go quite a way to achieving its goal.

Its intricate design for aluminum is one of the best in this category but it covers quite a powerful unit beneath. The unit features the rave-reviewed class D circuitry with a soft start turn on.

It’s also quite versatile in power handling with a power rating of RMS 550 watts x 1 channel on 4 Ohms, RMS 930 watts x 1 channel on 2 Ohm and RMS 1500 watts x 1 channel on 1 Ohm. At Peak output, on 1 Ohm, the amplifier has a rating of 1900 watts.

If you need something with more power there is also a 4500 watts option!

It is not just the power-packed by amplifier that sets it apart, the ease of installation and compatibility with a number of audio systems and electrical systems is a great factor.

The amplifier comes with dual speaker terminals for easy hooking and connection to multiple speakers. The design allows for a number of SK amplifiers to be used to channel power to one source.

It comes with oversized 1/0 gauge power and input terminals which help achieve the maximum flow of the current and also allows for efficient and fast installation.

Great sound quality and control are achieved by the internal filters with a variable subsonic filter with a range of off-50 Hz and a variable low pass filter. Further control is provided by the wired bass remote control.

Also Great

DC Audio DC1.2K-A3

RMS @1-Ohm Stable: 1200W or 1,450W (16V)
Peak @1-Ohm Stable: N/A
Class: D

This is a top competition amplifier to say at least! It’s one of the most solidly built amps that we have seen and with 16 volts for up to 1,450 watts you are ready for taking that competition award!

The interiors are loaded with high-speed digital circuitry and feature high-quality chokes, capacitors, and coils so that the amp will respond immediately to volume changes.

You will notice a smooth transition from low to high volume and vice versa, no matter how fast you turn the knob.

The bass boost is clean and distortion-free, with plenty of punch and well-defined notes even in the sub-100 Hz range.

Also Great

DS18 GEN-X3000.1D

RMS @1-Ohm Stable: 1000 W
Peak @1-Ohm Stable: 3000 W
Class: D

The DS18 GEN-X3000 amp stands out with its versatile power handling. At 1 ohm the RMS power is 1000 watts. But you can get models that yield up to 3000 watts – you have limitless options for your power needs.

One remarkable feature here is the Forced Cooling System which could be a boon for the longevity of your sound system. The feature which is located at the base of the amplifier sucks air through the fan to prevent overheating.

Beyond cooling, Gen X comes with a power-efficient design. The amp can supposedly work without the need for a high–output alternator. These devices don’t necessarily damage your components, but they can be costly to acquire.

You might also appreciate the molded power terminals on this amplifier. This engineering helps to protect your components. The additional insulation could also guarantee your safety when handling connections.

I also like the low pass filter on this amplifier. You can only get crisp and high-quality sound when there is a balance between power and frequency in your amp. The low pass filter, in this case, improves the sound quality by rejecting signals of higher frequencies.

Durability is possibly on the cards. The manufacturer asserts that the parts and components are fashioned from top-quality materials.

Finally, the total harmonic distortion on this device is 0.008 %. That means that your sound quality will be 99.992 % closer to the original recording.

Check out our list of the best 2-channel, 4-channel, 5-channel8-channel, and Bluetooth car amps!

Last update on 2024-07-24 / Affiliate links / *Image Disclaimer: We use images/data from Amazon Product Advertising API solely on products that link to Amazon. On products with the "Price at Crutchfield" button, we use images/data from as per the partnership deal.

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