here's my strange tale:

recently, i blew my wimpy 120W 5-inch pioneer sub watching the police concert on bd. i had it up to near-concert levels and it made a horrendous farting noise. i turned it down, and at low volume, would work ok, but if stressed, it would begin flapping again.

yay! time to upgrade. i got a 450W 12 inch from bic america. i installed this one, and immediately heard a weird, bassy "tapping" that would accompany any sound, even something as innocuous as someone writing on a chalkboard. a little bass punch would quietly augment each strike of the chalk, or whatever other sound (things as unlikely as shrill voices, etc.)

i turned the gain way down, and it got a little better, but it's still intolerable. i tweaked all the sub settings, both on that sub and the receiver, hoping it would go away, and it did not.

finally, i contacted bic, and their guy said the amp was defective. send it to us, and we'll fix it, free of charge. they tell me how to pull it out.

well, the wires would not dislodge from the terminals, and i felt like i was going to break the circuit board. frustrated, i hooked my old sub back up to hold the line while i figure this nonsense out.

while watching something and working on the bic, it suddenly occurred to me that the bass tapping noise was now happening to my old sub.

???

so is it the bic, is it the cable, or is it the receiver? i certainly don't want to mail off my new amp when the same problem has been spread to the other speaker. i have no idea what's going on.


pioneer receiver D510
both subs were connected via LFE by a monster sub cable


(i'm putting this on the receiver boards, too, so ignore if seen elsewhere)