I’ve tried multiple power supplies and cases: Monorocket late-era 104, Intellijel 4U84 and 4U42, and a Blackhole SubSix with an Intellijel mini PSU. Noise in all of them. I’ve removed everything else from the signal flow. I even tried an external filtered bus board that my friend loaned me. Tried multiple sockets on each of these supplies. Listened to my mixer/monitor combo with other signals and the noise isn’t there.
I’m pretty confident after almost a week of troubleshooting that it’s one or both of the Plonks. I’ve been talking to Avery who has been helpful. Hoping to get these sent to you all to look over them and test them with fancier equipment than I probably have and way more electrical engineering knowledge than I certainly have.
I really hope these can get fixed (and quickly) because a handful of shows (including Vancouver!) this summer was theoretically going to include this mini-case with two Plonks as the starting sound source for everything. Now…who knows…I pondered a Plaits as a replacement, but just not confident it’ll be adequate for what I’m trying to do with the Plonk.
Thanks for the responses guys, I appreciate your help.