Strange problem with Coaxials. Blown even with reading proper impedence on DMM??

[funkyab 10+ year member]

So,

im having this strange problem with my soundstream picassos on my tower.

Last season, at one point essentiall my higs/trebble cut out. A short time later, they all came back on. The problem presisted in that manor until finally there was no highs.

One person on this forum originally suggested ot could be that my internal crossover on my amp went bad. I thought a reasonable possibility.

today as i was beginning my new install, i took one of the speakers to my home receiver and again, still had little if any of the mid and highs of the 3 way.

However, tested it with my dmm and it read normal, at around 3.8 ohm. If it was blown, wouldnt i have a different reading? I tested some of my blown speakers as a comparison and that was indeed the case.

What in the world could be the problem. Im SOMEWHAT certain they couldnt be blown. I was feeding them below their rms with my gains set properly.

If they were blown, i would most likely hear a crackling/popping sound out of at least one of them. From my experience it is almost impossible that they would all go out like that at the same time if they were blown..

Any comments or suggestions would be GREATLY apperciated!

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[XanderMoser 10+ year member]

What do you mean "on my tower"? Are these in your car or not?

Are you running active or passive? What amp?

If passive, do those speakers have an outboard crossover, or just a cap on the tweeter?

Your woofer still works, so if your tweeter voice coil fried and is open (not shorted), then the DMM would just read the resistance on the woofer (assuming no outboard crossover). If the voice coil was fried and open then you won't hear a thing from it, it just won't work.

Did the highs go out on all of your speakers at the same time?

 

[funkyab 10+ year member]

"on my tower" means on my tower on my boat (see pic in my sig above).

Just a cap on the sweeter. they are Soundstream MS.653 (piccaso marine coaxial)

yes, the higs on all 4 speakers went out at the same time.

Like i mentioned. On a few occasions, all 4 speakes higs went out, and then came back on a few seconds later. This happened a few times, back and forth until they all did not come back on.

Strange.

 

[funkyab 10+ year member]

^^^^ Anymore suggestions? I keep coming back to the question of why they would all go out at the same time. What tests can I do?

 

[AAckley1 10+ year member]

wiring problem?

 

[funkyab 10+ year member]

Nope. I wish.

As i mentioned above, I have connected them to my home receiver to test them outside of the installation. No highs. But also, no popping or cracking on any of them that would indicate they were blown.

 

[wesl56 10+ year member]

If it was blown, wouldnt i have a different reading?

not necessarily... i would take them apart if its not too much trouble and test each driver individually

 

[fwb_1234 10+ year member]

not necessarily... i would take them apart if its not too much trouble and test each driver individually

I agree.

If there is someway to take off the plastic/metal coverings and test the individual leads, that might yield some diff results.