Hi
When connecting panel mounted XLR connector to a balanced power amp (BTL), I usually leave the chassis ground connector unconnected. The pin 1 (signal ground) is connected to the amp's signal ground input.
Now, the amp module (125ASX2 for example), once mounted to the chassis, it connects the signal ground to the chassis, via the mounting screws. My question: Should I connect the XLR's 4th external pin - the chassis ground to pin 1 or directly to the chassis, or should I continue to leave it unconnected to anything?
I do not have any hum or noise, but I wonder if bridging chassis and signal grounds will be a better practice, provided that the amp module will always bridge the signal ground to the chassis. Searching for this issue returns contradicting results.
Thanks
When connecting panel mounted XLR connector to a balanced power amp (BTL), I usually leave the chassis ground connector unconnected. The pin 1 (signal ground) is connected to the amp's signal ground input.
Now, the amp module (125ASX2 for example), once mounted to the chassis, it connects the signal ground to the chassis, via the mounting screws. My question: Should I connect the XLR's 4th external pin - the chassis ground to pin 1 or directly to the chassis, or should I continue to leave it unconnected to anything?
I do not have any hum or noise, but I wonder if bridging chassis and signal grounds will be a better practice, provided that the amp module will always bridge the signal ground to the chassis. Searching for this issue returns contradicting results.
Thanks