I was hoping you could school me and let me know what this switch does in my Revision H, MS275. I have seen them in the MAC200 and MS250 and have wondered what this switch does. Thanks in advance.
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It is also in the yellow position in all that I have seen
The yellow position is for driving high voltage (normal loads), and the red for high current. In red, it works better on lower impedances, like 1 ohm stereo or 2 ohms bridged.