Hi there, I just finished my one-case 2ch beta 22 and have some annoying hum on the output. Also with the volume turned down completely there's some kind of hiss. I followed AMBs wiring scheme correctly I think... The RCA-jacks have no contact to the case and are isolated from each other. If I have only connected the inputs to the boards (no ps-connection) (RCA In/G -> Alps pot -> board) there's no connection between the boards ground and case-ground Here's all the wiring concerning the s22/power 2x V+/G/V- -> ß22 boards G (s22) -> Neutrik locking jack G (s22) -> GLB -> encloruse (bottom) AC ground -> enclosure (bottom) AC ground an GLB are not connected to the same point When I measure betwenn the s22 ground and AC ground I get 10 ohms, as is resistor value of the GLB is 10ohm. Same reading from the body of the neutrik jack to the sleeve contact. Where's the mistake?