Best 8 Variable Gain Amplifiers in 2026
Daisy
Last Updated: Feb 8, 2026
Daisy
Last Updated: Feb 8, 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 |
|---|---|---|---|---|
| Speece, Inc. | 9.88 | ✅ | ✅ | ✅ |
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
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
Switchable Bass Boost - Bass Boost allows you to adjust the low bass within the boost range to just the way you like it
Variable Input 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
Specs - Dimensions: 9.13” x 10.44” x 2.25”, Weight: 4.43 lbs., Speaker Impedance: 2 to 8 Ohm, THD @ RMS Output: 0.01%, S/N Ratio: 102 dB, Frequency Response: 9 Hz to 50 kHz, Fuse Quantity: 1 30 Amp ATO Blade
Warranty - BOSS Audio Systems provides a 6 Year Platinum Online Dealer Warranty for purchases through Amazon.Com. We strongly encourage professional installation of this product to ensure proper functionality
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Speece, Inc. | 9.88 | ✅ | ✅ | ✅ |
Power - 450 Watts Max x 4 @2-Ohms, 225 Watts Max x 4 @4-Ohms, 900 Watts Max x 2 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
Mosfet Power Supply - A MOSFET is basically 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
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: 13.5” x 10.31” x 2.25, Weight: 12 lbs.
Warranty - BOSS Audio Systems 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 |
|---|---|---|---|---|
| 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 |
|---|---|---|---|---|
| Speece, Inc. | 9.88 | ✅ | ✅ | ✅ |
Power - 100 Max x 2 @ 2 Ohms, 50 Max x 2 @ 4 Ohms
Full Range - With a Full Range amplifier you not only have the option to run your speakers, but also your subwoofers
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 Input 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
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
Specs - Dimensions: 5.25” x 9” x 2”, Weight: 2.2 lbs., Speaker Impedance: 2 to 8 Ohm, THD @ RMS Output: 0.01%, S/N Ratio: 90 dB, Frequency Response: 12 Hz to 22 kHz, Fuse Quantity: 1 7.5 Amp ATO Blade
BOSS Audio Systems provides a 6 Year Platinum Online Dealer Warranty for purchases through Amazon.Com. We strongly encourage professional installation of this product to ensure proper functionality
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Speece, Inc. | 9.88 | ✅ | ✅ | ✅ |
Power - 600 Max x 2 @ 2 Ohms, 300 Max x 2 @ 4 Ohms, 1200 Max Bridged x 1 @ 4 Ohms
Full Range - With a Full Range amplifier you not only have the option to run your speakers, but also your subwoofers
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 Input 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
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
Specs - Dimensions: 12.28” x 10.44” x 2.25”, Weight: 5.86 lbs., Speaker Impedance: 2 to 8 Ohm, THD @ RMS Output: 0.01%, S/N Ratio: 102 dB, Frequency Response: 9 Hz to 50 kHz, Fuse Quantity: 2 25 Amp ATO Blade
Warranty - BOSS Audio Systems provides a 6 Year Platinum Online Dealer Warranty for purchases through Amazon.Com. We strongly encourage professional installation of this product to ensure proper functionality
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Speece, Inc. | 9.88 | ✅ | ✅ | ✅ |
Power - 300 Max x 2 @ 2 Ohms, 150 Max x 2 @ 4 Ohms, 600 Max Bridged x 1 @ 4 Ohms
Bridgeable - Dramatically increase the power output to you speakers and subwoofers by connecting two amplifier channels
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
Fixed High-Pass Crossover - Speakers reproduce sound based on high, low or mid-range frequencies. The High-Pass Crossover gears specifically towards “highs” in all size speakers including mid ranges and tweeters
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)
Variable Input 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
Specs - Dimensions: 9.16” x 10.44” x 2.25”, Weight: 4.25 lbs., Speaker Impedance: 2 to 8 Ohm, THD @ RMS Output: 0.01%, S/N Ratio: 102 dB, Frequency Response: 9 Hz to 50 kHz, Fuse Quantity: 1 35 Amp ATO Blade
Warranty - BOSS Audio Systems provides a 6 Year Platinum Online Dealer Warranty for purchases through Amazon.Com. We strongly encourage professional installation of this product to ensure proper functionality
| 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 |
|---|---|---|---|---|
| Speece, Inc. | 9.88 | ✅ | ✅ | ✅ |
Power - 100 Watts Max X 4 @2-Ohms, 50 Watts Max X 4 @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
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
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Speece, Inc. | 9.88 | ✅ | ✅ | ✅ |
Power - 400 Max x 2 @ 2 Ohms, 200 Max x 2 @ 4 Ohms, 800 Max Bridged x 1 @ 4 Ohms
Full Range - With a Full Range amplifier you not only have the option to run your speakers, but also your subwoofers
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 Input 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
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
Specs - Dimensions: 10.72” x 10.44” x 2.25”, Weight: 5.20 lbs., Speaker Impedance: 2 to 8 Ohm, THD @ RMS Output: 0.01%, S/N Ratio: 102 dB, Frequency Response: 9 Hz to 50 kHz, Fuse Quantity: 1 40 Amp ATO Blade
Warranty - BOSS Audio Systems provides a 6 Year Platinum Online Dealer Warranty for purchases through Amazon.Com. We strongly encourage professional installation of this product to ensure proper functionality
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Speece, Inc. | 9.88 | ✅ | ✅ | ✅ |
Power - 500 Watts Max x 2 @2-Ohms, 250 Watts Max x 2 @4-Ohms, 1000 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: 9. 5” x 10. 31” x 2. 25”, Weight: 6. 62 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 |
|---|---|---|---|---|
| DiscountsJungle | 9.86 | ✅ | ✅ | ✅ |
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
Mosfet Power Supply - A MOSFET is basically 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
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
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
Specs - Dimensions: 11.5” x 10.44” x 2.25”, Weight 7.8 lbs.
Warranty - BOSS Audio Systems 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 |
|---|---|---|---|---|
| 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 |
|---|---|---|---|---|
| always quality | 9.84 | ❌ | ❌ | ❌ |
POWER: 600 Watts Max x 2 @2-Ohms, 300 Watts Max x 2 @4-Ohms, 1200 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. Efficiency is the name of the game
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)
MOSFET POWER SUPPLY: A MOSFET is basically 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
BRIDGEABLE: Dramatically increase the power output to you speakers and subwoofers by connecting two amplifier channels
OTHER SPECS: Dimensions - Depth 10.2” x Width 6.5” x Height 2.8”, Weight – 4.5 lbs.
WARRANTY: BOSS Audio provides a powerful 6 year Platinum Online Dealer Warranty so long as the purchase is made through Amazon.com
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Speece, Inc. | 9.88 | ✅ | ✅ | ✅ |
POWER - 1500 Watts Max x 1 @2-Ohms, 750 Watts Max x 1 @4-Ohms
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
| 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
Here is the list of top-rated brands that were evaluated by PM.
| Brand | Count |
|---|---|
| Boss Audio Systems | 15 |
We've carried out a comprehensive analysis of 41,006 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 $96.87, 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 15 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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