Behringer HA400, 4 Channel Headphone Amp, Also Boosts Sound to Portable Devices | eBay
Behringer | Product | HA400
Behringer MicroAMP HA400 4-channel Headphone Amplifier Bundle with Hosa CMP-159 Stereo Breakout Cable - 3.5mm TRS Male to Left and Right 1/4-inch TS Male - 10 foot | Reverb