12VDC - 4 CHANNEL OUTPUT 4 Amps

12V 4 Channel Relay Board Relay Boards

12VDC 4 channel output 4 Amps

Cantek CTWS-SA-4P 4 Channel Output 4A Adapter

JL Audio XD400/4v2 4-channel car amplifier — 75 watts RMS x 4 at Crutchfield

800 Watts 4-Channel Amplifier - POWER400X2 - Jensen Mobile

If you're tracking more than one musician at once, or if everyone in a group wants to listen to a playback, you need a monitor distribution system. The compact, flexible PHA40 can power up to four pairs of headphones and up to four independent volumes. Grab this super-compact amp during your sessions to power practically any headphones--four of them at the same time, to be exact.

Pyle - Pha40 - 4-Channel Stereo Headphone Amplifier

Banda BD400.4 Digital Amplifier Module Banda 4 Channels 400 Watts RMS

PolarisUSA 18-CH Output Central Power Supply, 20Amps, 12VDC

HeadAMP 4 – Eight Output Stereo Headphone Amp – ART Pro Audio

4 Channel MG Electronics

Good BNTai 4 Channel Relay Module 1 SPDT DIN Rail Mount 24V DC/AC Interface Relay Module (4Channel ACDC24V)

DS18 ZXI.4XL Elite Full-Range 4 Channel Class D Amplifier 250 Watts RMSX 4 @ 4-Ohm

PDF Datasheet Available: IACS 4 Channel 10 Amp Relay Board 4CH10A-V2EL, Switch rating of 10 Amperes at domestic voltage (240-250v AC) or 10A at 30V

IACS 4 Channel 10 Amp Relay Board 4CH10A-V2EL (Optical)

400 Watts Compact 4 Channel Amplifier - QS400.4 2Ω PRV Audio

Elove 12V 5A DC SMPS Power Supply Adapter 4 Channel for LED Strip Light