It looks like Im a little late for the KLH10 subwoofwer party, but here I am., I just aquired this, the owner told me about the hum issue, I've run accross it before, repalced the diodes and
Seems like the board around the diodes, capacitors and the 6 wire pinout are burnt, but after a thourough cleaning I found that it may not be a burn, heat transfer seems right, but Im not sure. Also, I've been searching everywhere to see if I can install the bluetooth module from my vgn-ax570g into my vgn-ar520e. Thanx for your help.
Audio Players & Recorders - KLH - ASW10-120 Subwoofer