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I have a ground loop hum that I have isolated to an active crossover used for my tapped horn subs. The hum is just loud enough to be annoying. I can attentuate by connecting a clip lead from the chassis ground of the active crossover to the chassis ground of the monoblock amps. I'm looking for assistance for what else I could do that would not require this separate wire. All of my powered equipment uses 3 prong plugs and are plugged into the same circuit. The ground loop appears to be traveling back through the ICs from the active crossover to the TVC to the amps. I know the noise is not filament hum.
A simple schematic of my system is attached.
TIA,
Jim
Follow Ups:
Do all your interconnects have continuous ground connections?
You might try floating the ground on the crossover - AC Mains connection.
Happy Listening
Not sure what you mean by "continuous ground" for ICs. The IC's in this system are a combination of Cardas and DH Labs. When I build them I connect the shield if available on the input side of the IC and leave disconnected at the output.
I lifted the signal ground in the crossover and that helped. Lifting the mains ground did not help so I left connected (also for safety). This is the first time I've not connected signal ground to the mains ground for unbalanced system.
Thanks,
Jim
Continuous ground - the shield is connected at BOTH ends of the cable-
the goal is to have one device - usually an amplifier - be the grounded unit (with respect to the mains) and then have all components ground to the amp through the ICs
In my experience - the difference between continuous ground and dis continuous - is the difference between an antenna and a connector-
Happy Listening
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