lsic center has no sound from 1 speaker

betternot

i switched the 2 speakers around, and verified that the speaker is good. I came to a conclusion that the electronic device that the input speaker wire goes into and dispurses sound thruout speaker is no good. where can i buy this? i bought this new from ebay, has serial number, appeared new. just need it to work properly. polk parts where?
sean

VR3

Are you sure theres no sound?

They arnt playing the same signal, one is playing the mids and midbass, while one is just playing the lower spectrum of the mids, therefore it wont be as audible to you

jcaut

Edit: I see Trey beat me to this, but I'm going to say basically the same thing.

That device you're referring to is the crossover, and it's available direct from Polk. Just contact Polk Customer Service at 800-377-7655. HOWEVER, I seriously doubt that your crossover is bad. That speaker uses a "2.5-way" crossover. Polk calls it a "cascaded tapered array" or something similar. The frequency response from one of the midwoofers is rolled off at a much lower frequency than the other one. This is done to help prevent the negative effects that two side-by-side drivers, operating over the same frequency range, would otherwise have on the acoustical radiation pattern. Both drivers produce the bass and mid-bass frequencies, but then one of them is rolled off while the other one continues to produce the frequencies up to where the tweeter takes over. The one that's filtered lower is going seem much "quieter" than the other one-- To the point that you'll think it's not doing anything-- But it is.

Switching the drivers proved that the drivers are good. Unhooking the one that you think is working, leaving just the other one, should prove that it is actuallly working too, just over a different frequency range.

Jason