Best 8 Variable Gain Amplifiers in 2026
Daisy
Last Updated: Feb 7, 2026
Daisy
Last Updated: Feb 7, 2026
* PickSmartly editors independently research, review, and endorse the top products through comprehensive data analysis. We may earn a commission for qualifying purchases made through our product links.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| AVLeaderz | 9.87 | ❌ | ❌ | ❌ |
The R2-1200X1 full-range class-D mono amplifier (1.9" x 6.8" x 11.3") is packed with features and performance to deliver power and bass on demand with 1200 Watts of RMS power
Class D technology makes this amp extremely efficient by reducing demand on the vehicles electrical system (RMS Power: 400 Watts x 1 @ 4Ω OR 800 Watts x 1 @ 2Ω OR 1200 Watts x 1 @ 1Ω)
Featuring C.L.E.A.N. circuitry to help you adjust your gain settings, a P.O.W.E.R. Supply that generates more power as voltage increases, and integrated Punch EQ that corrects for acoustic deficiencies while delivering up to 3X the bass
Designed for subwoofers, a variable infrasonic filter and remote level control allows you to tune the bass for the desired level for the music
Famous Rockford Fosgate build quality with a full 1-year warranty when purchased from an authorized Rockford Fosgate reseller
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| CE Showroom | 9.89 | ✅ | ✅ | ✅ |
Power - 2000 watts Max X 1 @2-ohms, 1000 watts 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
Low/high level inputs - a low level (RCA) input is measured in voltages. A high level (+/- wire) input is measured in wattages. Both essentially carry signal from your receiver to your amplifier to your speakers
Variable low-pass Crossover - subwoofers reproduce sound based on a number of different low-range frequencies. You can set exact sound specifications for the bass frequency reproduction
Variable bass Boost - bass Boost allows you to adjust the low bass within the boost Range to just the way you like it
Variable gain control - The gain control is not for adjusting volume. It simply adjusts the amount of signal that is coming from your receiver and going to your amplifier
Dimensions - 13.13” x 6.5” x 2.8”, weight - 3.81 lbs. It can be installed in a variety of different places due to its’ slim and Compact design
Warranty - BOSS Audio provides a powerful 6-year platinum online dealer warranty so long as the purchase is made through Amazon.Com. We strongly encourage professional Installation of this product to ensure proper and safe functionality
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| BargainFlip | 9.88 | ✅ | ✅ | ✅ |
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 A / B Topology, MOSFET Power Supply
Low and High Level Inputs, Variable Low Pass Crossover, Variable High Pass Crossover
Variable Bass Boost, Variable Input Gain Control, Input Sensitivity Selector, Remote Subwoofer Control
Dimensions: Depth 9.5” x Width 10” x Height 2.3”
6 Year Platinum Online Dealer Warranty
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Moofin | 9.87 | ✅ | ✅ | ✅ |
1000 W MAX Power @ 2 Ohm x 2 Channels
500 W MAX Power @ 4 Ohm x 2 Channels
2000 W MAX Bridged Power @ 4 Ohm x 1 Channels
Full-Range, Class A / B Topology, MOSFET Power Supply
Low and High Level Inputs, Variable Low Pass Crossover, Variable High Pass Crossover
Variable Bass Boost, Variable Input Gain Control, Input Sensitivity Selector, Remote Subwoofer Control
Dimensions: Depth 16” x Width 10” x Height 2.3”
6 Year Platinum Online Dealer Warranty
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Speece, Inc. | 9.88 | ✅ | ✅ | ✅ |
Power - 800 Watts Max x 2 @2-Ohms 400 Watts Max x 2 @4-Ohms 1600 Watts Max x 1 Bridged @4 Ohms
Full Range - With a Full Range amplifier you not only have the option to run your speakers but also your subwoofers
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 and current precisely by removing the output current sensing loss & eliminating all secondary feedback circuitry
Variable Gain Control - The gain control is not for adjusting volume It simply adjusts the amount of signal that is coming from your receiver and going to your amplifier
Variable Bass Boost - With Variable Bass Boost you have the control of exactly how much BASS you want to pump out to your subwoofer(s)
Bridgeable - Dramatically increase the power output to you speakers and subwoofers by connecting two amplifier channels
Specs - Dimensions 14” x 10 3” x 2 3” Weight 9 lbs
- BOSS Audio Systems provides a powerful 6 year Platinum Online Dealer so long as the purchase is made through We strongly encourage professional installation of this product to ensure proper and safe functionality
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| PRV Audio Group | 9.59 | ✅ | ✅ | ✅ |
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
TECHNOLOGY: A smart electronic 2-way protection circuit protects the amp if it gets too hot or if speakers fail causing a short! Focusing in sound quality, a full range response of 10 to 24,000Hz was used to give the best sound reproduction on this tiny amplifier.
FEATURES: Heavy Duty 10 Gauge power and speaker wire Inputs. Built-in crossover filters for easy tuning! Choose between a fixed HPF at 90Hz or LPF at 90Hz + 45Hz Bass Boost or just turn it FLAT and use your external crossover or DSP settings. It also includes Variable Gain Control. Level controls are not for adjusting volume. They adjust the amount of signal that is coming into the amplifier from your signal source.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Speece, Inc. | 9.88 | ✅ | ✅ | ✅ |
3000 W MAX Power @ 1 Ohm x 1 Channel
1500 W MAX Power @ 2 Ohm x 1 Channel
750 W MAX Power @ 4 Ohm x 1 Channel
Low Level Inputs, RCA Pre-amp Outputs, Strapping Capability, Phase Shift Selector, Variable Subsonic Filter
Variable Low Pass Crossover, Bass Boost, Variable Input Gain Control, Input Sensitivity Selector
Remote Subwoofer Control
Dimensions: Depth 13” x Width 10” x Height 2.3”
6 Year Platinum Online Dealer Warranty
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| loveyourstereo (Authorized Dealer)✔ | 6.45 | ❌ | ❌ | ❌ |
POWER: 1500 Watts Max x 1 @2-Ohms, 750 Watts 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 and current precisely by removing the output current sensing loss And eliminating all secondary feedback circuitry
VARIABLE LOW-PASS CROSSOVER: Subwoofers reproduce sound based on a number of different low-range frequencies. You can set exact sound specifications for the bass frequency reproduction
SWITCHABLE BASS BOOST: Bass Boost allows you to adjust the low bass within the boost range to just the way you like it
VARIABLE GAIN CONTROL: The gain control is not for adjusting volume. It simply adjusts the amount of signal that is coming from your receiver and going to your amplifier
DIMENSIONS: The BE1500. 1 is 10 inches in Depth, 7 inches in Width and 2. 3 inches in Height. It weighs 4. 5 lbs.
: BOSS Audio Systems provides a Powerful 6 Year Platinum Online Dealer so long as the purchase is made through . We strongly encourage professional installation of this product to ensure proper and safe functionality
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| DoukAudio | 9.84 | ✅ | ✅ | ✅ |
Mutiple input/output interfaces: with 3.5mm AUX/stereo RCA/5-DIN inputs and stereo RCA/5-DIN outputs, can be compatible with most low-volume audio sources such as ipod, ipad, phone, TV, MP3 player, potable CD player, computer, video game etc., and boost their output to the level needed to drive amplifier or speakers.
With built-in amplification and voltage boost circuit: adjustable gain to match better with different audio sources, support DC 5-24V wide input voltage that can share the power supply of amplifiers, while L1 can always work at a high voltage of 26V to provide ±12.5V high output amplitude and max 20dB high gain.
Unique design and HiFi clear sound: double-side PCB design, NE5532P op amp with pluggable socket design, convenient to change other op amps to enjoy different sound and bring much DIY fun for audiophiles. High-qaulity sealed potentiometer, with wide frequency bandwidth and excellent dynamic response, the sound is smooth and natural, warm and delicate with ultra-low distortion.
Mini size with exquisite appearance, compact and all-metal design for durability and shielding the electronics from electromagnetic interference with noise rejection. Perfect design in size and function, suitable for many scenarios to increase the output level, such as home stereo system, mixer or speaker setup, karaoke, audio recording, party, live stage event etc.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
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
THERMAL PROTECTION: To keep both your car and stereo amp safe, this model is equipped with thermal, overload and short circuit protection. Specially designed from the bottom up to provide safe and high quality sound in a sturdy form factor
SLIM SIZE DESIGN: This box amp's small size makes installation a breeze, you'll have no trouble finding a spot for this little yet powerful device. Additional features include LED indicators, RCA output, soft turn-on circuit, and more
Four Channel Bridgeable Amplification - 1600 Watts Total System Output @ 4 Ohms - High Level Low Impedance MOLEX Input Connector - Frequency Response:15Hz-30kHz - LED Diagnostic Condition Indicator
Tri-way Configuration:4/3/2 Channels - Variable Gain Control - RCA Low Level Inputs - Overload Protection - Automotive Type Fuse Protection
4 X 400Watts Total Output @ 4 Ohms - MOSFET Pulse Width Modulated Power Supply - Speaker Output Terminal Strip - Thermal Protection - Dimensions: 11.02''L 9.76''W 2.26''H
2 Ohm Stereo Stable - Signal/Noise Ratio 90dB - Short Circuit Protection
Built-In Variable Subwoofer Crossover - THD Less Than 0.04% - Power On LED Indicator
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Speece, Inc. | 9.88 | ✅ | ✅ | ✅ |
400 W MAX Power @ 2 Ohm x 4 Channels
200 W MAX Power @ 4 Ohm x 4 Channels
800 W MAX Bridged Power @ 4 Ohm x 2 Channels
Full-Range, Class A / B Topology, MOSFET Power Supply
Low and High Level Inputs, Variable Low Pass Crossover, Variable High Pass Crossover
Variable Bass Boost, Variable Input Gain Control, Input Sensitivity Selector, Remote Subwoofer Control
Dimensions: Depth 13.5” x Width 10” x Height 2.3”
6 Year Platinum Online Dealer Warranty
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Speece, Inc. | 9.88 | ✅ | ✅ | ✅ |
400 W MAX Power @ 2 Ohm x 2 Channels
200 W MAX Power @ 4 Ohm x 2 Channels
800 W MAX Bridged Power @ 4 Ohm x 1 Channels
RCA Low Level Inputs, High Level Inputs, Fixed High Pass Crossover, Variable Low Pass Crossover
Variable Bass Boost, Variable Input Gain Control, Input Sensitivity Selector, Remote Subwoofer Control
THD @ RMS Output: 0.01, Channel Separation: 90 dB, Signal To Noise Ratio: 102 dB, Frequency Response: 6 Hz – 50 kHz
Dimensions: Depth 8.8” x Width 7.3” x Height 2.3”
6 Year Platinum Online Dealer Warranty
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| WoofersEtc | 9.82 | ❌ | ❌ | ❌ |
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
Total Harmonic Distortion: <0.1% | Signal-to-Noise Ratio: 104dB | Variable 40-220Hz 12dB Low Pass Crossover | Variable 15-50Hz 12dB Subsonic Crossover
Variable 0-12dB 45Hz Bass Boost | Selectable 180deg Phase Shift | Dimensions: 9" W x 2.5" H x 20.50" L
Here is the list of top-rated brands that were evaluated by PM.
| Brand | Count |
|---|---|
| Boss Audio Systems | 4 |
| Sound Storm Laboratories | 4 |
| Douk Audio | 1 |
| Pyle | 1 |
| Rockford Fosgate | 1 |
| Soundstream | 1 |
| Timpano | 1 |
We've carried out a comprehensive analysis of 7,853 reviews on variable gain amplifiers, using our selection criteria to identify the best options in the categories. Our findings reveal that most customers typically select variable gain amplifiers priced around $141.30, with top brands including crown, oiyagai and pyramid and boss audio systems
Our team of expert editors reviewed these high-quality items and handpicked the top 13 variable gain amplifiers for your consideration. We've also done extensive research on numerous sellers, identifying the best ones in the categories category. These include amazon.com and oiyagai and loveyourstereo (authorized dealer)✔ .
We are dedicated to assisting our users in finding the right amplifiers Products based on their needs, saving them considerable time when choosing which variable gain amplifiers to buy. We take pride in the number of satisfied users we've helped through our thorough and insightful reviews.
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