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Speaker problem

Hi guys, i need a little help here
I have a center channel speaker that is probably defective
It is turning off the amp channel.
I was first using a yamaha receiver to play with an amplifier
The amplifier channel was going off when i increased the volume up
I tried changing the speaker cables - did  not work
Tried changing the channel - using the center speaker as a front channel - the amplifier was always turning off regardless the change following the center speaker channel
I am curious as what it may be.
A crossover? A drive unit? How do I check what the problem is since I don't get support where I live
afmartucci

Showing 8 responses by rodman99999

rodman99999
6,206 posts
 
Remove all wires from the HTM2(jumpers and from the amp), and check from red to black, one binding post pair at a time, multimeter set on, "Ohms". If one pair shows a short, or- very low impedance, you’ve found your issue and can stop. See what you get there, before trying the woofer and tweeter, connected individually to the amp(one at a time). REMEMBER: volume all the way down, and barely/slowly bring it up, especially when trying the tweeter.
rodman99999
6,206 posts
 
Do any of your speaker wires run under a carpet? I’ve seen many cables shorted(their insulation crushed), after being stepped on repeatedly.
rodman99999
6,206 posts
 
" They told me by phone that it could be the Yamaha ( I don’t know how)" How? Their cash drawer probably told them. There is the possibility that the HTM’s problem is intermittent. Again: You mentioned the amp shutting down, when you increase volume. Does the HTM speaker make any sound before you increase volume?
rodman99999
6,206 posts
 
With the tweeter and woofer each having separate inputs, you should be able to check each’s network, by(with volume all the way down/jumpers removed) connecting your speaker cable to one pair of binding posts(red/black) at a time and barely/very slowly bringing the volume up. See if either driver has any sound. I’m guessing, you don’t own an ohmmeter.
rodman99999
6,206 posts
 
The HTM2's have bi-wiring provision.   Did you happen to change anything, regarding the wiring(jumpers or connections), before the problem arose?  
rodman99999
6,206 posts
 
The center speaker has to be the problem, from your testing. It’s obviously damaged, one way or the other. Again, though- Did the Yamaha & HTM center speaker combination work, at one time(is this problem a recent development)?  You mention the amp shutting down, when you increase volume.  Does the HTM speaker make any sound before you increase volume?
rodman99999
6,206 posts
 
Did the Yamaha/center speaker combination work, at one time? If so- refer to my first post. If not, is the NAD/center speaker combo working?    Clarity, please.
rodman99999
6,206 posts
 
If your amp continues to function, with the center channel speaker disconnected, there's an obvious problem with that component.  There are a number of things(within a speaker system), that could result in a short.  ie: a burnt voice coil, if the coil wire doesn't burn through(open up), will have lost it's insulation between windings, drastically reducing the driver's impedance.   That could be triggering your protection circuit.   If you have a multimeter, check that unit's impedance, or- try another speaker, in that position, eliminating the suspect component.
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