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Old 6th September 2012, 01:17 AM   #1
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Default Relay audio switcher

I'm curious what people think of this method for switching audio with relays.

The goal is to switch with no DC bias to prevent popping.

Hence the 1 Meg shunt around the relay contact with a 10uF AC coupling capacitor. The high value resistor couples the DC level to the capacitor but the 1 Meg and 4.7K output resistor (R9/R10) shunt the channels to -93dB when the relay is open.

Any thoughts?
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Old 6th September 2012, 09:16 AM   #2
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Old 6th September 2012, 12:27 PM   #3
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I guess my PDF wasn't allowed. I'll add a PNG to this post.
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File Type: png switcher.png (46.7 KB, 109 views)
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