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I've never seen ferrite beads for audio list a value on a schematic before. I don't think the specific value matters much, other than the ability to withstand the amount of (miniscule) current going through them. Something like this would do just fine.TQ2-12V is a very common signal relay.I think +/- 16V is actually more common in audio. All 500-series equipment is +/- 16V, and I believe most equipment from API, Amek, Mackie, and many many others is the same. It's no problem to build a +/- 16V supply using LM317/337's.
I've never seen ferrite beads for audio list a value on a schematic before. I don't think the specific value matters much, other than the ability to withstand the amount of (miniscule) current going through them. Something like this would do just fine.
TQ2-12V is a very common signal relay.
I think +/- 16V is actually more common in audio. All 500-series equipment is +/- 16V, and I believe most equipment from API, Amek, Mackie, and many many others is the same. It's no problem to build a +/- 16V supply using LM317/337's.