transformer hum in the subwoofer

[dini]

I bought an infiinity sound surround system a couple of years ago- HTS-20.
Good system, nice sound but I hear mild (you can hear it in a quiet room if you listen and happen to be sitting near it) transformer(?) hum.

Are there any remedies for this?

thanks

[avionic]

Can you tell if the hum is coming from the the sub driver or the plate amp.If it is coming from the amp it is probably either a loose transformer winding or mounting bolt or if it is a IE transformer a loose laminated plate.If the sound is coming from the speaker I would suspect a power supply filtering issue(leaky cap).
Verify all rca connectors are clean and securely plugged in.(ground loop)

Dave

[dini]

Dave,

I connected the subwoofer with unshielded cables because the (provided) Y-connection at the receiver output was not shielded. Would using a better shielded cable reduce the hum (which is almost inaudible on second inspection)? Is that what you meant by rca (ground)? I see no ground connection like with a turntable.

I worked on f4e phantoms WCS from 1974-78. Was stationed at Ft. Walton Beach at Eglin (should have bought a house then) and Clark in the PI. I see you're retired AF. Looks like an f15 eagle to me. Saw a new one at Eglin before I went overseas. Became a mailman and am now short.

At any rate.
Thanks for your help.
regards
bob

[avionic]

dini
Yes I was refering to the rca phono plugs/jacks red/white or red/black.
I was stationed at Eglin AFB for 14-15 years - 33rd fighter wing. Sunny Fort Walton Beach..

Dave