Gently used in smoke free studio. A famous machine with built-in speaker attenuator, equalizer & HUSH that Allan Holdsworth was involved in the development.
Also used at the recording site. The output from the head amp to 100W is input and converted to line level, and each can be branched up to 6 systems while keeping the distortion of the head amp as it is, and the spatial system and modulation system can be connected in parallel, so the sound image is clear without being disturbed. You can create a sound with contours.