On-Stage HA4000 Four-Channel Headphone Amp

Allows up to up to four people to listen to a recorded take at the same time, Individually adjustable volume for each output

Also great for use during playing or recording, allowing listeners to hear the main mix, Features an input impedance of 1000 kiloohms (unbalanced) and an output impedance of 10 ohms minimum on each channel, Max Gain: 20dB per channel, Output Connector: 1/4" TRS Stereo, Power Supply: 12-18v DC adapter (included)