Re: Troubleshooting Harman Kardon TS-14 Subwoofer

Hi budm, the hum is there even if no connections to any input jacks.
I checked the filter capacitors using analog tester. Where, upon touching the test probes (multi-tester is set to x10Ohm) to both terminals of the capacitor, the pointer of the meter goes to the mid-section and slowly moves to right (or infinity).
With regards to ripple voltage, I cannot check them as I don't have an oscilloscope.
Thanks..

Re: Troubleshooting Harman Kardon TS-14 Subwoofer

Hi there, newbie here.
I have an HKTS11 sub, and recently I noticed a low humming sound even without audio signal introduced in to the sub-woofer.

Further, connecting some wires on the input, I noticed that the sub receives some FM radio station signal.

Anyway, that FM signal can be eliminated. I am more concern on the humming produced by the sub. Reading on the posts above, I am little bit skeptical if the output filter caps would cause the hum, also the said output filter caps do not show any...