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View Full Version : CAL26 titan tweeter shutting off - Phase Plug set, ideas??



Latina33
08-24-2007, 09:41 PM
So I get my Profi Vanadium Phase Plugs installed today, with their passive crossovers...they are amped with bridged power of 200w RMS a side. The gains for the bridged channels are adjusted down very conservatively, and the crossovers for the front and rear channels (for bridged mode) are both set at 80hz/12 oct/db slope.

When I turn up the volume to a normal louder listening level on my HU, my tweet in my passenger side door shuts off.....after I turn down the volume for a couple of minutes, the tweeter comes back on. Only the passenger side tweet goes off...the driver's side CAL26 stays on continuously.

I recently had a pair of CMX 265's installed, with all of my gain and crossover setting set EXACTLY the same way they are now with the Profi set, and I never had an issue at all with the CAL25 tweets shutting off on me.

Is there something I'm missing as far as adjustments/tweaking? I noticed when I take one of the crossover covers off, I see a small green housing with two tiny flathead screws that the overpowering bulb is attached to....is it possibly something to do with that?

This set works fine with the volume turned way down, but when I crank it how I used to crank the CMX's, I lose a tweet.

Any ideas on what I might want to check to fix this?

Latina33
08-25-2007, 02:05 AM
Come on fellas, 23 looks, and no imput? I know somebody has something useful to say! :fro:

bigmac16
08-25-2007, 12:14 PM
switch the tweeters and see if the other one cuts out on that side

filtor1
08-25-2007, 12:35 PM
I was one of the 28 lookers. I really wish I could help. The first thing I would do is inch down your gains. If that didn't work, I would try, as the above poster suggested, swapping out the tweeters. It is possible that it is an issue with that channel of the amp/the crossover/or the tweeter itself. I would bet that it is the amp and/or the gains though.

AwaySooner
08-25-2007, 01:58 PM
I doubt 200RMS is too much power for the profi. I have 550+RMS on tap for the profi 2 way, no problem with tweeter cutting off. Obviously I have not tried full blast for obvious reason, it gets pretty loud. My guess is the crossover. If the amp shut off, the midbass would've cut off too, not just the tweeter.

the727kid
08-25-2007, 02:07 PM
Tighten the light bulb. It may be coming loose, breaking the circuit to the tweeter.

Louisiana_CRX
08-25-2007, 02:16 PM
The crossovers have a protection circuit that looks sorta like a capacitor...when the signal starts to clip it puts the tweeter into protect so you won't damage it.....

filtor1
08-25-2007, 02:31 PM
I doubt 200RMS is too much power for the profi. I have 550+RMS on tap for the profi 2 way, no problem with tweeter cutting off. Obviously I have not tried full blast for obvious reason, it gets pretty loud. My guess is the crossover. If the amp shut off, the midbass would've cut off too, not just the tweeter.

I wasn't trying to say that 200 watts was too much power, I meant to say that some degree of clipping could be causing the issue. Sorry I didn't clarify. :)

filtor1
08-25-2007, 02:32 PM
The crossovers have a protection circuit that looks sorta like a capacitor...when the signal starts to clip it puts the tweeter into protect so you won't damage it.....

There ya go. That is what I was trying to get out and couldn't :)

Latina33
08-25-2007, 03:57 PM
Thanks for all the imput, guys. I'll check the crossover bulb screws to make sure they're tight, and also maybe swap crossovers to see if the problem happens on the other tweet after I swap.

It just drives me nuts that I had the exact same setup/power going to a set of CMX's (which costs less than HALF vs. a set of Profi Van phase plugs), and they worked flawlessly. :blackeye:

nismos14
08-25-2007, 04:08 PM
Try swapping the crossovers, if that doesn't do squat, swap the tweeters themselves. That will at least either eliminate the crossover or the left right channels. Are these being by amped? Could be a bad input on the amp.

Let us know.

Latina33
08-25-2007, 07:49 PM
Try swapping the crossovers, if that doesn't do squat, swap the tweeters themselves. That will at least either eliminate the crossover or the left right channels. Are these being by amped? Could be a bad input on the amp.

Let us know.

Thanks for the input, brother.

Well, I swapped crossovers, same result....actually on louder listening level, now that the crossovers have been swapped, BOTH tweets go out now, not just one. I turned the gains for my front channels all the way down to their minimum setting, then turned my HU up to normal listening volume, tweets still shut off.

Would it damage my tweeters if I unscrewed and took out the protection bulbs from the crossovers? I'm running 200-210 a side, and I know the specs for each woofer aand tweeter both for this set specify that their nominar power handling is 120w each.

I'm possibly considering going active, also. Suggestions?

nismos14
08-25-2007, 09:14 PM
Run'em active, if the tweets still shutoff and its not too too loud then there's probably something wrong with the tweets, or your amp......

Make sure your crossover point is selected with care.

mlstrass
08-25-2007, 09:50 PM
Are those speakers so inefficient that you need to push almost twice RMS to them? Just wondering....

I'd be careful if you bypass the protection circuit as tweeters don't need very much power to go poof.

He could be deaf LOL

nismos14
08-25-2007, 10:48 PM
It's not that their inefficient, they just take much more than they are rated for, the rating is conservative IMO.

I think he's deaf too, LOL jk.

filtor1
08-26-2007, 01:27 AM
Have you tried to contact the seller? The company you bought them from should be able to help you source this type of issue as well.

nismos14
08-26-2007, 02:11 AM
Have you tried to contact the seller? The company you bought them from should be able to help you source this type of issue as well.

Yep, that should be the FIRST place you contact about possibly product issue.

bchandler
08-26-2007, 11:08 PM
I once had water in my crossover that caused the same problem with a passive set (not Rainbow.) I'm sure you would have noticed water when you switched up the crossovers, but just throwing it out there.

DejaWiz
08-26-2007, 11:19 PM
Here's hoping you are able to get the problem resolved, brother..... any updates?

Latina33
08-27-2007, 02:06 PM
I once had water in my crossover that caused the same problem with a passive set (not Rainbow.) I'm sure you would have noticed water when you switched up the crossovers, but just throwing it out there.

Hey, I hadn't even though of that! It may just be that this might've happened. I took the crossover covers off, and looked closely for anything that might resemble water-type damage, and didn't see anything evident.

Is there a way to test crossovers individually to find out if this might be the issue?

Latina33
08-27-2007, 02:11 PM
UPDATE!!

I just un-bridged the Profi's, and rerouted the RCA's and wiring to the front two channel inputs on the amp. I also adjusted the crossovers on the amp to 85Hz, and adjusted the gain on the amp to its 'nominal' setting.

I turn the HU on, gradually increase the volume until I reach 25-26, then 27....the tweets both cut out again.

Will it harm my tweeters if I remote the overload protection bulbs in the crossovers? Or will that not make a difference, and I should just consider going active?

Latina33
08-27-2007, 02:18 PM
Oh, and my HU is an Alpine 7998, with the crossover settings turned off....I'm only using the crossover settings on my amp (Alpine MRD F752).

CrazedCat
08-27-2007, 02:23 PM
If we can rule out that you're overdriving the speakers then it has to be that you're either clipping your amp or it's a faulty xover.

I wouldn't remove the tweeters protection circuit in the xovers.

Latina33
08-27-2007, 02:49 PM
If we can rule out that you're overdriving the speakers then it has to be that you're either clipping your amp or it's a faulty xover.

I wouldn't remove the tweeters protection circuit in the xovers.

Cool, got it. I won't remove the tweeter protection bulbs. I wasn't determined to do that, but I also wasn't sure if it was an option or not.

So I'm definitely not overdriving the speakers now that they're not bridged anymore. They are getting right around 110w rms a side now.

As far as my amp clipping...I never had that issue when the CMX's were installed a couple of weeks ago, and when I un-bridged the Profi's earlier today, I set the gain to the amp's nomal setting (not even half way up as far as the adjustment range goes).

Again, thanks for the input, everyone. I really do appreciate it. This is frustrating, as you can probably imagine, but you guys chiming in to try and help make more sense of this is really good to have. :fro:

nismos14
08-27-2007, 02:59 PM
Have you contacted the person that you bought the set from, it doesn't seem like you're doing anything wrong, don't keep going crazy, call the person you purchased it from and get support from them and have them warranty it if need be.