Further adventures of the CS400

FTGV

headrott wrote: »

So wouldn't the tweeter sound "strange" then if it's being overpowered?

It may periodically sound harsh or stressed depending on a number of things like 1)the spectral content of the program material2)the listening level 3)the crossover point in relation to the tweeters natural resonant frequency.If it is within an octave or less then the tweeter will be forced to make long excursions with some material which could eventually cause failure.

Also one would expect the frequency response around the crossover point to change due to the phase relationship change created by the removal of the inductor.Most likely a dip will occur in the response.

headrott

Well, I was just watching an episode of Star Trek ("Operation: Annihilate") on blu-ray in DTS-HD. The sound is phenominal, except the audio from the center channel will cut out (That's all sound not just the tweeter). I am assuming this is due to the inductor not being hooked up. I have not yet tried to hook the inductor up again to see if it will work, but I would guess the tweeter will not. Again I ask, why does the tweeter work with the L1 (tweeter) inductor disconnected but does not work when the L1 inductor is connected. And even stranger is that when neither inductor is hooked up to the crossover board the tweeter will work and the drivers will not? I don't understand the reason for that? Anyone else understand and know what's going on?

Greg

FTGV

headrott wrote: »

Again I ask, why does the tweeter work with the L1 (tweeter) inductor disconnected but does not work when the L1 inductor is connected.

Thats a mystery.

And even stranger is that when neither inductor is hooked up to the crossover board the tweeter will work and the drivers will not?

Because the inductor in the low pass section for the woofers is in series with their voice coils so removing it creates an open circuit so no signal will reach them.
The inductor in the tweeter section is connected in parallel to it's voice coil so signal will still reach it (through the series capacitor)even when it is removed.

BeefJerky

It sounds like the L1 inductor is bad in such a way that it is passing all frequencies rather than just the lower frequencies not destined for the tweeter. I'm honestly not sure how that could happen to an inductor unless it had physical damage.

You risk damaging the tweeter by continuing to use it since it is receiving frequencies that it cannot handle. The fact that it is cutting out is a warning from either the speaker or amplifiers protection circuitry. As such, I would not recommend using the center channel until the inductor is replaced with a new one.

headrott

OK. I replaced the entire crossover with a new replacement from Polk ($32.00 shipped!!:D) It must have been the L1 inductor as the speaker works fine now. The inductor did not look physically messed up at all, but somewhere it must have had a problem on it. It sound a little on the bright side though, but it may be due to the new caps and tweeter. I have about 20 hours on it now and will wait and see if it's brightness drops and mellows out. Thanks for everyones' input and help.

Greg