I have a JBL Venue Sub12 subwoofer. Lately it's been making ODD sounds after it has been off for about 10 or 15 minutes. The sound is like a like a gurgling type sound with a brief rumble (not the good kind of rumble). Any idea what happening?
You may have a ground loop issue. Although historically the noise associated to that is pretty consistent, it might not be a bad idea to consider using an isolator on your cable line. Another thing you may want to try is an electrical adapter to remove the ground path on your subwoofer.
If you take yourself too seriously expect me to do the exact opposite