Originally Posted by
sweet212
I had a JBL authorized dealer re-foam the woofers and picked them up yesterday. Connected a signal generator before reinstalling them to test them. At low frequencies below 30 hz where the cone is moving a 1/4" or so there is slight, light scraping noise. Like paper touching somewhere in the voice coil. At higher frequencies the scraping turns into a slight buzz. Pushing the cone equally around the dust cap reveals no contact or sound. It may be just distortion in the signal generator.
Should I be concerned or just ignore it?