HM-400 Headphone Amplifier with Backpack

Set up shared headphone monitoring from one rack space with the HM-400 4-channel headphone amplifier, paired with an RPAK charcoal backpack included at no extra cost. Four channels provide three headphone outputs apiece, for 12 total listening connections across a studio, practice room, or house of worship. The main left and right stereo inputs and outputs connect the unit with other audio gear, while a level control and seven-segment LED meters on each channel and the main section keep levels visible. Each channel adds an auxiliary input with balance control, allowing the main and aux signals to be mixed for an individual monitor feed. Per-channel EQ, mute, and stereo or 2-channel mode switches give users practical control during rehearsals and recording sessions. The included backpack has a padded laptop pocket sized for models up to 15 inches, adjustable padded shoulder straps, two open side pockets, and a hidden zippered side compartment. Its main compartment measures 15 inches wide by 21.75 inches high when extended and 15 inches wide by 18 inches high when folded. Nylon fabric and a zippered main compartment complete this carry option.