Run a impedance test on the speakers. you should see between 4-8 ohms. This does change with frequency however.
Otherwise, someone else might have a better idea.
Otherwise, someone else might have a better idea.
Quote:
Originally Posted by Kraddy /forum/post/18156576
Upon more investigation, I found that the tweeters on my towers no longer work.
Is there any way to confirm if they are blown, or is there any way to confirm that it may be the crossover hardware that is fried?
Quote:
Originally Posted by Tim916 /forum/post/18156619
Sounds like someone likes to rock out! Do you play your system loud? The tweeters could definitely have fried at high volume.
Quote:
Originally Posted by Kraddy /forum/post/18172461
I dont think I push it too loud, and I certainly dont get a chance to push it very often either.
I dont think the tweeters are fried, they show resistance readings of around 8 on multimeter.
Quote:
Originally Posted by rdgrimes /forum/post/18172635
DCR readings on the tweeters don't mean they are not damaged. Damage can be heat related, where the voice coil is intact but has been damaged by heat and is now jammed/rubbing in the magnet assembly. Take the tweets out and connect them to an audio source one at a time, do they work and sound normal? Careful with full-range sources. HF sweep tones are best.
Also be aware that a defective amp can quickly fry tweeters, and even a normal amp driven into clipping will do the same. Given your issue with the amp shutting down, I think that until proven otherwise, the finger is pointing at the amp.
Quote:
Originally Posted by Kraddy /forum/post/18177171
Still would like to know if damaged tweeters would cause an avr to trip off, once volume is turned up.
Quote:
Originally Posted by rdgrimes /forum/post/18177203
Remove them and see if it still shuts off.
Quote:
Originally Posted by DonH50 /forum/post/18180838
If the tweeters were overdriven the voice coil can warp and ultimately "fuse" into place, ceasing all sound output. it is possible the crossover fried and a capacitor within them shorted, but it sounds to me like fried tweeters.
Underpowering is the cause of most destroyed tweeters; the amp clips, which generates lots of very high (suprasonic) frequency energy, and instead of moving that fast (they can't) all the energy in the tweeters is converted into heat. BTW, few if any Denon receivers are rated to drive four ohms.
Quote:
Originally Posted by JeffInDFW /forum/post/18180349
Kraddy....Since I am about to buy a set of Focal 836v speakers, I'm really digging into your issue.
**DISCLAIMER** I am about to completely botch explaining what I read! I am going from memory, and trying to explain what someone else thought on another forum...
On another forum, back in 2007, a guy claimed that the drivers Focal uses do not stand up to loud playback for an extended period well. He claimed that the driver will heat up, causing something (the voice coil???) to heat up and distort in shape, which will then cause it to ground out??? I tried to find it to link it for you, but I can not find it now....
As a test, can you disconnect, one at a time, each of the drivers and see if you can find one that causes your AVR to shut off???