Hum when I touch the RCA — ground loop?

Posted May 24, 2026 · 3 replies

eZstah Question Solved May 24, 2026

Faint hum that gets louder when I touch the RCA connector shell. Single amp, single source, both on the same outlet.

Ground loop, or is my chassis ground floating?

3 replies

The Listener Answer May 27, 2026

Classic floating ground. Check that your chassis is actually bonded to mains earth.

The Listener May 29, 2026

Touching it makes it louder = you are the antenna and the shield is not grounded. Fix the chassis ground.

The Listener Jul 25, 2026

No bro this idia is kinda bad