Best 8 Variable Gain Amplifiers in 2026

Power - 1100 Max x 1 @ 2 Ohms, 550 Max x 1 @ 4 Ohms

Class A/B Topology - Class ‘A’ amplifiers have enormous amount of current flowing through its output transistors with no audio signal. Class ‘B’ amplifiers have no current flowing through its outputs with no audio signal

Mosfet Power Supply - A MOSFET is an electrical switch that allows the flow of electrical current. It controls the output voltage & current precisely by removing the output current sensing loss & eliminating all secondary feedback circuitry

500-Watt MOSFET 4-Channel Class A/B Power Car Amplifier

RMS Power at 2 Ohms: 125 Watts x 4 Channels

RMS Power at 4 Ohms: 75 Watts x 4 Channel

Power - 1000 Watts Max x 2 @2-Ohms, 500 Watts Max x 2 @4-Ohms, 2000 Watts Max x 1 Bridged @4 Ohms

Class A/B Topology - Class ‘A’ amplifiers have enormous amount of current flowing through its output transistors with no audio signal. Class ‘B’ amplifiers have no current flowing through its outputs with no audio signal

Full Range - With a Full Range amplifier you not only have the option to run your speakers, but also your subwoofers

550 W MAX Power @ 2 Ohm x 2 Channels

250 W MAX Power @ 4 Ohm x 2 Channels

1000 W MAX Bridged Power @ 4 Ohm x 1 Channels

Full-range

Class-D amplifier

4 channels of 110 watts RMS @ 2 Ohms

COMPACT DESIGN: Digital class D Brazilian technology allows this amplifier to have a small footprint by integrating a high-speed mosfet power supply with top of line transistors to ensure performance in a small heat sink without compromising performance. Dimensions: 3.93″ depth x 5.02″ width x 2″ height

POWER: This amplifier is designed to run your stereo system with the power it needs to perform! 500 Watts maximum dynamic RMS power output of 4x 125 Watts at 2 Ohms per channel. Its high efficiency rate of 87% provides more power with less battery consumption.

BRIDGEABLE: Double the power output to your speakers by bridging two channels. Minimum impedance of 4 Ohms per bridged channel at output power of 2 x 225 Watts RMS

1600 WATT POWER: The Pyle 4 Channel Car Amplifier is perfect for your vehicle's sound system. Gives you up to 1600W bridgeable output. Features switchable bass boost, variable gain control, configurable electronic crossover network

SILVER-PLATED RCA PORTS: The RCA ports are silver-plated for eliminating signal loss. The subsonic filter allows low-end interference to be cut so your speakers will always deliver the highest quality audio

DISTORTION-FREE: The MOSFET pulse width modulation power supply allows for a clean distortion-free signal to your compact speakers providing you w/ crisp and clear audio for an outstanding music experience. Also features pulse width modulation system

COMPACT DESIGN: Digital class D Brazilian technology allows this amplifier to have a small footprint by integrating a high-speed mosfet power supply with top of line transistors to ensure performance in a small heat sink without compromising performance. Dimensions: 8.11″ depth x 8.11″ width x 2.60″ height

POWER: This amplifier is designed to run your stereo system with the power it needs to perform! 1200 Watts maximum dynamic RMS power output of 4x 300 Watts at 2 Ohms per channel. Its high efficiency rate of 84% provides more power with less battery consumption.

BRIDGEABLE: Double the power output to your speakers by bridging two channels. Minimum impedance of 4 Ohms per bridged channel at output power of 2 x 520 Watts RMS

Class-D Mono-block Subwoofer Amplifier, 1200 Watts Max Power, RMS 600 Watts x 1@2Ohm; RMS 350 Watts x 1@4Ohm.

Featuring a high-speed MOSFET power supply, premium grade internal components, as well as 4-way protection circuitry, the amplifier will safely operate at the highest levels of performance for hours on end. Highly efficient heatsinks keep the amplifier cool with a sophisticated new look.

Recoil mono amplifiers come with bass remote control. Use it to customize your bass on the fly with just a turn of a knob.

HIGH PERFORMANCE - DS18’s SXE series of amps was designed for users looking for an extreme increase to the quality of music reproduced by their vehicle. The SXE-4000.4D guarantees your sound system’s speakers perform at their peaks on every use

VARIABLE CROSSOVER - The SXE series of amplifier gives users the ability to tailor the audio reproduced by their vehicle to their personal listening preferences through the use of it’s fully variable crossover, adjustable gain input sensitivity, and multi-channel amplifier design: everything you need to take control of your listening experience

PERFECT SIZE - As a Class D amplifier, the SXE series uses power transformers significantly smaller than your average amplifier, making it the perfect size for any vehicle’s custom build: but, what it lacks in size it makes up for in power

1-Ohm Minimum Impedance Monoblock Operation | Multi-color RGB LED Illumination Accent Lighting | Solid Color, Flashing, Random, or Slow-Motion Color Change | MOSFET Power Supply with Audiophile Grade IR Transisitors

Direct Short, Thermal and Overload Circuits Protect Amplifier | 200mV-6V Low Level RCA Input and Pre-Amp Output | Variable 12dB Low Pass and Subsonic Crossovers | 12dB Bass Boost Increases Low Octave Harmonics

DataLink for Strapping Two Amps for Double Power | Dash Mount Gain Control Module Included | RMS Power Rating: 800W x 1 at 4-Ohm | 1,400W x 1 at 2-Ohm | 2,500W x 1 at 1-Ohm | 3,000W x 1 at .5-Ohm | 6,000W Max Power

New for 2017!

Gain Control With "Optimal Input" Indicator

FIT2 (Fail-Safe Integration Technology) Circuitry

1000W Max Class AB @ 2 Ohm, Stable at 2 Ohm and 4 Ohm with Bass Knob Included

S/N Ratio > 70 dB with and Input Sensitivity at 200mV-6V with Input IMP at 22k Ohms

HPF at 80 Hz ~ 1.2 kHz with LPF at 50 Hz ~ 250 Hz and Frequency Response at 10 Hz ~ 30 kHz

Power Handling: 1200W @ 1-Ohm, 1000W @ 2-Ohm, 650W @ 4-Ohm; includes power and protection LED

Remote sub level; bridgeable in/out that allows you to link two amplifiers together

Gain control with 0-12db bass Boost

2-OHM Stereo/4-OHM Mono (StereoChannels) + 2-OHM Mono stable

Variable HP/lp Crossover

Variable gain control

This audio amplifier module is a mono audio amplifier based on the LM386 chip,which is useful for DIY many HAM radio experiments.It is a very cost effective method of small signal amplification.Very convenient instead of using separate components.

Onboard LM386 chip, with 20 multiplier benefits circuit design, on-board speaker wire holder, on-board 10K variable resistor, you can adjust the amplification volume.

LM386 audio amplifier board power indicator,the main feet of the chip has been leaded, can input audio signal directly, wide operating voltage range: 4-12V

EASY INSTALLATION: Signal booster amplifier is easy to install, made of good quality plastic, metal, and rubber material for high performance

AUTOMATIC GAIN ADJUSTMENT: Built in gain automatic adjustment function, eliminating manual adjustment, easy and convenient to use

VARIABLE LEVEL CONTROL: Video input level is 2.0Vpp, video output level from 0.5‑1.5Vpp, video output impedance for 70ohms, working voltage is 12V DC