Amazon.com: DS18 CANDY-XXL1B Amplifier in Black - Class D, Monoblock, 3000 Watts Max, Digital, 1/2/4 Ohm, with Remote Subwoofer Level Controller - Compact Mini Amplifier for Speakers in Car Audio System : Electronics
Amazon.com: Alpine S-A32F S Series 4 Channel Digital Amplifier 80 Watts RMS x 4, 2 Ohms : Electronics
Sonos Connect: Amp - Wireless Home Audio Amplifier for Streaming Music, Amazon Certified and Works With Alexa : Electronics
Amazon.com: Fifine Headphone Amplifier 4 Channels Metal Stereo Audio Amplifier,Mini Earphone Splitter with Power Adapter-4x Quarter Inch Balanced TRS Headphones Output and TRS Audio Input for Sound Mixer-N6 : Electronics
Amazon.com: 4 Channel Bluetooth Power Amplifier - 1000W Home Audio Rack Mount Stereo Receiver w/AM FM Radio, USB, Headphone, Dual Wireless Mic w/Echo for Karaoke, LED, for Speaker Sound System - Pyle
Amazon.com: Soundstream ST4.10000D Compact 4-Channel Car Amplifier 90WX4 - ST4.1000D : Electronics
Amazon.com: BOSS Audio Systems OX1.5KM Onyx Series Car Audio Subwoofer Amplifier – 1500 High Output, Class A/B, 2/4 Ohm, Low/High Level Inputs, Low Pass Crossover, MOSFET Power, Monoblock, Full Range, Stereo :
Amazon.com: Pyle 4 Channel Marine Amplifier - Compact Power 400 Watt RMS 4 OHM Full Range Stereo & Waterproof - Wireless Bluetooth Receiver Audio Speaker with LCD Digital Screen - PFMRA440BB : Electronics
3200W 12V 4 Channel Car Amplifier Stereo Power Amp Audio 4CH Bass Sub Woofer : Electronics
Amazon.com: Crunch PX1000.4 Power Amplifier (Class Ab, 4 Channels, 1,000 Watts), 3.70in. x 12.60in. x 10.80in. : Electronics
Neewer Super Compact 4-Channel Stereo Headphone Amplifier with DC 12V Power Adapter for Sound Reinforcement, Studio, Stage, Choir, Personal Recording, Features Ultra Low Noise (Original Version) : Musical Instruments
Amazon.com: Power Acoustik EG4-1500 1500W Class A/B 4 Channel Amplifier : Electronics
Amazon.com: 4 Channel High Power Amplifier - Slim Stereo 4 Channel Car Audio Stereo Amplifier Amp 4Ohm : Electronics
Amazon.com: Genius Audio GEX8000EQ Digital Full Range Car Amplifier Monoblock 8000 Watts RMS Class D 1-Ohm Stable with Power Protection System and Bass Boost for Speaker and Woofer Performance : Electronics
Amazon.com: 4 Channel Car Stereo Amplifier - 4000W High Power 4-Channel Bridgeable Audio Sound Auto Small Speaker Amp Box w/ MOSFET, Crossover, Bass Boost Control, Silver Plated RCA Input Output - Pyle
Amazon.com: TC-Home 4 Channel Professional Powered Mixer power mixing Amplifier Amp 16DSP with USB Slot : Musical Instruments
Planet Audio AC1200.4 4 Channel Car Amplifier - 1200 Watts, Full Range, Class A/B, 2-4 Ohm Stable, Mosfet Power Supply, Bridgeable : Everything Else
Amazon.com: Kicker PXA300.4 Compact 300W 4 Channel Amp Amplifier Powersport UTV ATV Marine (Renewed) : Electronics
Amazon.com: Home Audio Power Amplifier System - 500W 4 Channel Theater Power Stereo Sound Receiver Box Entertainment w/ USB, RCA, AUX, MIC w/ Echo, LED, Remote - For Speaker, iPhone, Studio Use -
500W Karaoke Wireless Bluetooth Amplifier - 4 Channel Stereo Audio Home Theater Speaker Sound Power Receiver with AUX IN, FM, RCA Subwoofer Speakers OUT, USB, Microphone IN with Echo - Pyle PTA44BT : Everything Else
Amazon.com: HiFi Bluetooth 5.0 Digital Power Amplifier Stereo 2/4 Channel Audio Amp 50W x 4 : Electronics
Amazon.com: BLAUPUNKT 1600W 4-Channel, Full-Range Amplifier AMP1604 : Electronics
Amazon.com: Sundown Audio SFB-500.4D 4 Channel AMP Component Speakers Tweeters Amplifier : Electronics
