I built a powered AB switch with a relay, and LED indicator lights to select A or B amp for my speakers.
It has an on off switch and an A/B switch with two LED's. The relay does the actual switching. It works great. I use it to switch between my MC275 and MC352. It isn't real pretty, since I built it as a proof of concept type of thing, but it works great.
I built another one using a 4 pole double throw switch without any indicator lights as well.
I sold that one to a friend of mine.
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Chuck
McIntosh, PMC, Bryston, Olive, Rega, Ortofon 2M Black, JL Audio, PS Audio, Alan Maher, Aural Harmony, Black Mountain, Wireworld, Symposium, DIY amp switch box, P Millett DIY headphone amp.
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Last edited by MC352; 10-02-2011 at 03:49 PM.
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