I just rewired my batcave, and ever since I finished, I've noticed there is a low volume "pulse" that goes through the whole house audio speakers as well as the intercom speakers. They are on an entirely different system, and I'm struggling to think of what could be causing the exact same sound to be on both systems. I'm thinking it's likely to be some sort of wiring that's not shielded or grounded or whatever.
any ideas?
any ideas?
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