Ultra compact Headphone monitoring box, with Stereo jack and Mini jack inputs feed two channels of stereo headphone outputs. Heavy duty all-steel chassis, individual Level controls plus DC power connector. Channels 1 and 2 are AutoLinked into Channels 3 and 4 unless other inputs are jacked into 3 and 4. A compact, flexible unit. DC power can be supplied from a 12 Volt wall mounted DC power supply, or from the ARX Audibox PSU 15V DC power supply unit for maximum headroom. Available in Double Header Dual Channel format only. Requires Phantom or DC power.