passive analog summing mixer "this is a very compact four channel passive analog mono mixer with mutes and volume controls for each channel along with a master volume control. it can be used to process either audio or control voltages and it can be used backwards as a splitter. being a passive design means that it does not impart any "color" or filtering of any kind and yes you can use this as an analog summing buss with your computer. it is the same design used in devices costing 10 times as much. being passive also means that it doesn't require a power source but because of that it may require a slight amplification after the main output to bring it back to up the desired level, measuring it during audio use showed a nearly 20db drop in volume, this new version [ v.b ] has less of a drop then the first, and no the mutes do not pop when used. there are different colored TSP stencils used. they are a little slapdash, orange, red and green. the remaining two are just black. cases are powder coated black
::: CONTROLS :::
channel attenuators: reading from left to right are the 4 input volume controls
mutes: diagonal up and to the right is each channel's mute switch
main attenuator: far right knob is the main output volume
i/o jacks: each jack is in line with it's knob "
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