2. speakers
  3. 193323-96791

Help trouble shooting sub hum

I have my subs run off my speakers using a banana to rca cable off the bi wire posts on the speaker. Funny thing is that if I turn my amp off the subs hum and it gets increasingly louder until I turn them off. in a quest to better dial in the sub volume I added a passive preamp in between the speaker and sub so the sub’s volume can be set at 12 o’clock instead of 4 clicks above zero. Then I want to use the attenuator to fine dial the sub in.

it works as expected except that wnow with the sub coming up much higher there a constant hum barely audible from the listening position.  Since it existed before the passive went in it’s obviously something else. But what?

gochurchgo
1 response Add your response
immatthewj
2,411 posts
 

I have my subs run off my speakers using a banana to rca cable off the bi wire posts on the speaker.

I am not sure I am understanding how you are saying that you have your subs connected to the system. You are going from your amp to your speakers and then from your speakers to your subs? I connect my sub using RCAs out of my preamp, but typically isn’t the alternate way to go to use speaker wire FROM amp out TO the sub(s) and then speaker wire FROM sub(s) TO speakers? Anyway, that’s the way the diagram shows it in my own subwoofer manual, but maybe that varies by manufacturer?

Log in to respond
More to discover
80x80
Spatial Audio X3
80x80
Credo EV 350 Reference
80x80
Klipsch Khorn AK-6