Distribution amplifier, switchable between microphone and line levels. Two balanced inputs, individually configurable for microphone or line levels, can be routed to eight outputs. The levels are adjustable for all outputs. For each channel a 20 DB pad expands the adjustable dynamic range, for a wide range of applications. A switch allows 1 source to be distributed to 4 stereo outputs, or 2 sources to be distributed to 8 mono outputs.