Glensound GS-MM83 - Audio Monitor With Eight Mono Inputs & Three Stereo Inputs in 1U Lighting or all-pass filters using mute

or all-pass filters using mute and cutoff controls

and TONEX iOS for smart devices

On guitar it sounds as if you have a Shure SM57 in front of a Marshall half-stack

And stereo modules no longer need to be soldered to be paired

Glensound GS-MM83 - Audio Monitor With Eight Mono Inputs & Three Stereo Inputs in 1U Lighting or all-pass filters using muteDescription : The Glensound GS MM83 is an 8 mono and 3 stereo input audio monitor 1u subrack (sometimes referred to as a pre hear unit). The GS MM83 allows production personnel to control and listen to various programme and communication sources. Front Panel: From left to right, the first eight potentiometers are mono sources, which have indicators for signal presence and left right both signal routing switches. The last three potentiometers are