Check the listing for details. Deersync H4 4-Channel Professional Studio Headphone Amplifier. Color: Space Gray, Condition: New. Listed at 89.95 USD. Deersync H4 4-Channel Professional Studio Headphone Amplifier4-channel Headphone Distribution Amplifier with Balanced Inputs, Channel Volume Controls, Big Knob Master and Mute Control, and Aux Inputs Overview This multichannel headphone amp was just launched in 2022. It can be one of the most valuable studio tools. The highly utilitarian 4-channel headphone distribution amplifier offers features that most sound engineers look for in high-end studio models. Balanced inputs ensure low noise and distortion, while 1/8" stereo and RCA aux inputs let you connect different source devices flexibly. The extra-large knob of the master volume control makes the operation more convenient, while the aux/primary independent input volume control and master mute switch save your ears when you need to make connection changes on the channel you're monitoring. Deersync H4 4-channel headphone amplifier is perfect for any studio or desktop workstation. Its compact design is also great for your mobile devices of, laptop, or smartphone when recording on the go. Deersync H4 Headphone Distribution Amplifier FeaturesA highly utilitarian 4-channel headphone distribution amplifierThe unique design of the extra-large knob of the master volume controlPerfect for Pro/Home studio, live, podcasting, and radio applicationsBalanced 1/4" TRS inputs match the output of professional studio gearEach channel includes a 1/4" stereo output, volume control, and plenty of gainAux/Main independent input volume controlMaster mute switch lets you easily protect your ears when changing connections1/8" stereo and RCA aux inputs provide multiple connections. Tech SpecsType:Headphone AmpInput Channels:StereoOutput Channels:4 stereo channelsAnalog Inputs:2 x 1/4" (left, right), 2 x RCA (aux 1), 1 x 1/8" (aux 2)Input Volume ControlAux / Main Independent ControlHeadphones:4 x 1/4" TRSControls per Channel:VolumeForm Factor:DesktopPower Supply:15V DC power supply (included)Height:2.25"Width:4.75""Depth:4.5"Weight:12.3 ozManufacturer Part Number:7402