I'm having ground loop issues when connecting my active crossover to my amp. When my amp is hooked up to my speakers without any input (rca's unconnected), the speakers are completely silent. My amp's chassis and power supply ground is connected to earth ground.
However, after connecting my active crossover (pictured) to my amp, I get ground loop hum. If I leave the earth ground unconnected (the green wire in the first pic) the hum is gone. Just to summarize:
Amp (earthed) + Active Crossover (earthed) = hum
Amp (earthed) + Active Crossover (unearthed) = silent.
It doesn't matter which ground I connect the earth ground in my active crossover (power supply ground, speaker ground, etc), the hum happens when its connected.
I've attached pics of my setup and my layout for both the active crossover power supply and the main board. If you'd like anymore pics or tests for me to do let me know.
However, after connecting my active crossover (pictured) to my amp, I get ground loop hum. If I leave the earth ground unconnected (the green wire in the first pic) the hum is gone. Just to summarize:
Amp (earthed) + Active Crossover (earthed) = hum
Amp (earthed) + Active Crossover (unearthed) = silent.
It doesn't matter which ground I connect the earth ground in my active crossover (power supply ground, speaker ground, etc), the hum happens when its connected.
I've attached pics of my setup and my layout for both the active crossover power supply and the main board. If you'd like anymore pics or tests for me to do let me know.