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I have a kenwwod AX-7 home theatre systems. the right side top speaker (tweeter) on one side does not work. i'm thinking there is a fualt with the amplifier on the right side.

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If the only problem is the tweeter, and the woofer is still working, you do not have a problem in the amplifier. The problem is the speaker. The tweeter is blown or you have a problem in the cross over network in the speaker.

You can always switch the speakers and connect them to the opposite channel. You can do this very easy at the back of the receiver where the speaker wires are at. Put the left speaker wires on the right speaker and the right speaker wires on the left speaker. If the same speaker still has no tweeter you know that the speaker is the problem.

The only way this could be a problem in the amplifier is if you have two different sets of inputs for each speaker, one being the low end for the woofer and the other being the high end for the mid range and tweeter. That would mean you have two sets of speaker wires going to each speaker. Each set of speaker wires would have a positive wire and a negative wire for a total of 4 wires going to each speaker. I don't remember this system being set up that way, but I could be wrong.

I hope this was helpful, you should be able to get the speaker fixed at an authorized Kenwood repair center in your area for a reasonable price. As a guide, my shop only charges $25 for the labor plus the cost of the tweeter to replace a tweeter. Any other shop should be similar. Kenwood does sell replacement drivers for almost all of their speakers.


Posted on Jun 21, 2008

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What happened is that the tweeter is blown. or a fuse in the speaker that goes to the tweeter has blown. Hopefully that is it.
There are several causes. Here is the theory so you understand how to match an amplifier to a speaker system.
Tweeters have a much lower capacity for amplifier power then woofers do. All professional speakers as well as home speakers reflect this.
You may ask exactly what blew the tweeter?
Usually what destroys the tweeter is not amplifier power but distortion. If someone is overloading the microphone, or the microphone is not trimmed to the mixer. You get distortion. This distortion is what caused the tweeter to blow. The signal must be clean. If you put too much power in, it may survive OK but if you put distortion in, it will more likely blow.
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Also when doing sound work, the ears of an engineer naturally lower the perception of loudness. Engineers often keep turning up the equipment up more and more during a performance because they have lost the perception of loudness that was there when they started. That is also the reason that many professional studio musicians and drummers loose much of their hearing at an early age.
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Bare with me, and we will figure this out. It is a very diificult job trying to troubleshoot something that is not in front of you.

After this post, it will be about an hour or so before you will hear from me again, I will be on my way home from work.

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The 7.1 has all those same speaker outputs plus it has a surround back with right and left channel.

I will get back to you in about an hour or so.

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