Best 2 Differential Amplifiers in 2026

The R2-300X4 full-range class-D 4-channel amplifier (1.9" x 6.8" x 10.1") is packed with features and performance to deliver power and bass on demand with 300 Watts of RMS power

Class D technology makes this amp extremely efficient by reducing demand on the vehicles electrical system (RMS Power: 50 Watts x 4 @ 4Ω OR 75 Watts x 4 @ 2Ω OR 150 Watts x 2 @ 4Ω Bridged/Mono)

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

Includes: Amplifier. Bass Remote. Birth sheet with tested power. Owner’s manual. Mounting Screws. Warranty.

Rockville dB55 4000 Watt/2000 Watt RMS 5 Channel Amplifier. CEA Compliant Power Ratings (Rated at less than 1 % distortion) (Use these CEA ratings when matching and comparing with other CEA compliant brands such as Kicker, Rockford Fosgate, etc). 2 Ohm: 120 Watts x 4 + 500 Watts x 1 <1% THD+N. 4 Ohm: 80 Watts x 4 + 300 Watts x 1 <1% THD+N.

RMS Power Ratings: (Use these RMS ratings when comparing with great brands such as Hifonics, Earthquake, Soundstream, etc). 2 Ohm 240 Watts x 4 + 1000 Watts x 1. 4 Ohm: 160 Watts x 4 + 600 Watts x 1. Peak: (The amount of power the amplifier can produce for a split second at the loudest part of a song. 2 Ohm 480 Watts x 4 + 2000 Watts x 1. 4 Ohm: 320 Watts x 4 + 1200 Watts x 1.

2.1CH Bluetooth 5.0 Stereo Amplifier & U-Disk Player. BL20C Class D power amp supporting U-disk/ Bluetooth/ RCA input can drive passive speakers+powered subwoofer. U-Disk input for convenient and portable use support audio format: MP3/WMA/APE/ FLAC/WAV.

BL20C stereo receiver amplifier adopts STMicroelectronics TDA7498E chip. The TDA7498E is a dual BTL class-D audio amplifier with a single power supply designed for home speaker systems applications. Special features: smart protection, thermal overload protection, the small offset of less than 20 mV, standby and mute features, differential inputs minimize common-mode noise.

Advanced Circuit Design Ensure Hi-Fi Sound. The upgraded Bluetooth 5.0 audio technology powers the wireless sound behind many of the world’s finest devices that you love, so you can stream music from your favorite media services without compromising on sound quality, works with the latest devices including iPhone/Android, iPod, iPad, PC, Laptop, Computer TV, DVD, etc.

📢 PEAK POWER: 1000 Watts

📢 RMS POWER: 【4 ohms: 180W x 1 chan.】【2 ohms: 320W x 1 chan.】【1 ohm: 500W x 1 chan.】

📢 COMPACT: Cutting edge Micro Class D technology allows amplifier to be extremely compact. Dimensions: 6.8"L x 3.3"W x 1.5"H

DS18 GEN-X4500.1D has the following RMS power: at 1 Ohm 1500 watts / at 2 Ohms 900 watts / at 4 Ohms 500 watts - THD Distortion 0.08%

Designed, Engineered, Developed, and Quality Controlled in the USA - Minimum THD at Rated Power: 98dB. Under Voltage Protection at 10V. Over Voltage Protection at 15V. Bass Frequency Response: 30Hz - 80Hz. Fuse Rating 40A x 4

High-Speed MOSFET Power Supply Optical Coupler Class "D" Technology. Fully Adjustable 12dB / Octave Crossover with Differential Circuitry. Low Pass Filter: 40Hz - 180Hz. Subsonic Filter: 17Hz - 50Hz. Phase Control Switch. Full IC-Controlled Protection Circuitry. Remote Dashboard Subwoofer Control. Fully Adjustable 12dB Bass Equalizer. Mute and Delay Soft Start System.

♥Introduction: The AD620 is a low-cost, high-accuracy instrumentation amplifier that requires only one external resistor to set the gain over a gain range of 1 to 10,000. Ideal for portable (or remote) applications. With high accuracy, low offset voltage, and low offset drift, the AD620 is ideal for precision data acquisition systems such as electronic scales and sensor interfaces. Also features low noise, low input bias current, and low power consumption. The module has a fixed voltage output.

♥Basic Features: ✭Module Name AD620 Instrument Programmable Amplifier ✭Module size:50mm * 50mm ✭Module power supply: 5V-24V ✭Module input signal type: single-ended signal or differential signal ✭Module signal input and output range: the input signal range is within 100 microvolts of the power supply, and the output signal range is within the power supply ✭Module bandwidth: AD620: 120KHz (G=100), AD623: 800KHz (G=1), AD620/623 is lower than 50KHz at high gain, and higher than 1MHz at low gain

♥ Other Features: ✭Module gain: When there is no solder slip, the AD620 will zoom by 10 times by default, and the AD623 will zoom by 20 times by default. During welding slip, AD620: G=1+50K/Rg, AD623: G=1+100K/Rg ✭Maximum magnification of the module: more than 2000 times (actual measurement), due to the large gain of the waveform frequency band, it is recommended to use multi-stage amplification with high gain ✭Fixed output voltage: 5V-10V (default delivery 5V)

Ultra-compact, high density aluminum alloy chassis provides superior thermal stability | Four layer, glass epoxy circuit board for enhanced performance and reliability | Circuit board conformal coated (water resistant) for marine applications | Full Range Class D amplifier technology

Bridgeable for high power operation (CH1+CH2/CH3+CH4/CH5+CH6) | Balanced differential inputs for superior noise rejection | Input sensitivity from 200mV to 10V accepts Line (RCA) and Speaker level input | Selectable auto-turn-on modes: Signal Sensing (VOX), 12V Remote (REM) and DC offset (DC)

Fully variable, 12dB per octave, electronic crossover | Remote level control for Channels 5 and 6 included | Built-in BTR Port (MICRO-USB) to connect our optional Bluetooth receiver-controller | Top mounted controls for convenient adjustment | Integrated soft clip light for quick system set-up | Illuminated logo

The Reference 6001A amplifier features a low-profile chassis and a small overall footprint to fit in more vehicles where available space is limited.

Unlike many amplifiers available at similar prices, the Reference 6001A features variable electronic crossovers and bass boost circuits allowing for precise system tuning and performance.

The Reference 6001A has been engineered using Balanced Differential Inputs to ensure low noise and distortion even at high output levels. This also makes it far less susceptible to line induced radiated engine noise.

Name: THS4131 Fully Differential Amplifier Size: 45mm X 34mm Supply Voltage Range: 5V Single Supply ±15V Dual Supply

This module can implement single-ended to differential, single-ended input, and double-ended output. Has high performance, low noise, wide power supply voltage range and other advantages.

The THS413x consists of a true fully differential signal path from input to output. This design produced excellent common-mode noise suppression wells that improved total harmonic distortion.

Usually the CTRL pin is connected to the MUTE pin of Bluetooth.

The amplifier board is in ACF-1 mode by default. When using the CTRL mode setting, solder R5 off.

The appearance and color of different batches , which does not affect the .

POWER ON: Atom series amps are built with sequenced delays to eliminate Residual power-up/power-down pops. Equipped with differential RCA inputs to isolate 12v audio to ground.

DESIGN: A Hybrid Aluminum Alloy Heatsink for optimum heat dissipation combined with an intricate MOSFET power supply full of Audiophile Grade IR Transistors. A Military Grade SMT PCB for Dynamic Performance finishes the stack.

SIGNAL: Volume low ESR Capacitance Banks compensate for power supply ripple. A set of individually regulated Preamp/Crossover components ensures signal purity.

AD623 is better than AD620 in practical use. AD623 can use single power supply, belonging to rail-to-rail operational amplifier, but the power supply range of AD623 (± 6v@max) is much smaller than that of AD620(± 18v@max), so AD623 is more suitable for integration in low-power and low-voltage applications.

Secondly, the internal bias of AD623 is indeed much smaller than that of AD620. When we actually debugged the module, we found that AD623 basically did not need to adjust the bias. The ac signal is basically symmetric relative to the zero point, but the AD620 needs to adjust the special bias circuit to eliminate the dc component and achieve the effect of zero point symmetry.

Exquisite module, excellent magnification performance. The weak signal detection effect is good.