The rb, Hd6 headphone distribution amplifier is a 1u rack, Mount which distributes stereo audio to a limit of 6 different sets or may, Of headphones be utilized as 6 independent each with, Headphone amplifiers their own input and volume control. A typical application might be to provide common headphone feeds for guests in a radio studio, With a separately perhaps including, Derived feed talk, Back, For the presenter. The main stereo input is on xlr, 3 connectors on the rear panel which are electronically balanced and may serve as wired unbalanced. A stereo/mono input select switch on the rear panel sums both sides outputs to deliver a mono feed to the headphones. The unit can receive an override audio signal via a jack socket for each output channel. Plugging in the jack plug will divert the headphone output from the master audio signal to the audio present on the jack plug. The override audio inputs has the potential to be individually configured as parallel outputs of the by setting, Front sockets internal jumpers. The master volume control adjusts overall standard of the 6 outputs and is not able to affect the level of channels using the override inputs. The master volume can be disabled by internal jumpers.