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Center speaker shorts out receiver

839 Views 13 Replies 6 Participants Last post by  caes4, 
C
My pioneer vsx-9040thx keeps automatically shutting down a few times throughout every movie and the phase control starts blinking. I have kef htc 5001.2 speakers (L,R,C,SL,SR, SW) which has a range of 100-30k hz.

The receiver shuts off at the same points in the movie if I have it at a certain volume level. It’s at -12.5 dB so I don’t think it’s that loud. I have troubleshooted it to the center channel speaker because unplugging the center channel speaker causes the receiver to not shut off.
I have also found that the problem is eliminated if I turn the volume down OR if I go into the manual eq settings and decrease the 4K/8k/16k settings under 1.0 db for the center channel.
I feel like these speakers should be capable of handling higher levels and I am frustrated as I can not utilize the higher frequencies for the center channel (auto eq has optimized the 4K/8k/16k settings you above 3db.

Can someone please explain to me what’s going on?

Thanks
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J
Check the speaker wire connection at each end to ensure there are no loose strands possibly touching another speaker post, otherwise, possibly a defective speaker.
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C
I have banana plugs so there are no loose wires.
I doubt it is a defective speaker, but I will attempt to switch the center speaker with one of the other speakers and see if the same problem occurs
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M Code
Level too high to the Center speaker, AVR going into shutdown...
Options are:
  • Turn it down
  • Get a higher power AVR
  • Get a more efficient center channel speaker

Juts my $0.02... ;)
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L
Center channel speaker cable could have a defect or damage which can short at a certain amount of power. Connecting another left or right speaker to the center connection will let you know if its the reciever or center/cable. If its not the reciever then check if its the speaker or the cable.


Sent from my iPad using Tapatalk
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C
Hey guys.
So did some further testing.
I swapped the cables for the center speaker and still have the same problem.
I tried switching one of the other speakers with the center speaker and the receiver does not short out so I have troubleshooted it to the center speaker as the issue.
The other 4 speakers are hts 5001.2 whereas the center speaker is htc 5001.2 but I think the speakers are identical in all respects except there is no screw hole on the center speaker to attach the stand /forum/images/smilies/frown.gif

So I can not even swap one of the other speakers with the center one. Maybe I can purchase the same center channel but I am wondering if it will cause the same problems

Super bummed /forum/images/smilies/frown.gif
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K
A speaker repair shouldn't be that involved. Definitely much less than a new speaker unless you just want a new matching center.
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C
The center speaker seems fine though. It’s only when I turn up the volume loud (not abnormally loud) and it’s a higher pitch 8k and above frequency in the movie that causes the receiver to short out.

Is there actually something wrong with the speaker?
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C
So conclusion, the center speaker crossover is blown.
Getting it repaired as we speak
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altpensacola
caes4 said:
So conclusion, the center speaker crossover is blown.
Getting it repaired as we speak
Click to expand...
This issue was very interesting so thanks for the follow up post. I can relate to your frustration.
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L
caes4 said:
So conclusion, the center speaker crossover is blown.
Getting it repaired as we speak
Click to expand...


Its great you post the conclusion, and hopefully everything will be good once its fixed :)


Sent from my iPad using Tapatalk
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C
So the local repair shop has changed their tune and they said the tweeter is blown and it’s discontinued 😞 but they said they fixed the shutting amp down problem and that it was some faulty soldering.
I think they were the ones that blew the tweeter trying to resolder wires because the speaker definitely didn’t sound as bad as it is now.
Well this sucks, I need to buy a new center speaker.
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K
The speaker appears to be UniQ with a coaxially mounted tweeter. I saw very few available in search listings. The center appears to be the same as the other speakers in the system, except possibly different stand mounting. I saw one available on HIFIShark (no association) for 65 euro.
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C
Thanks for the research.
Yea I saw some of them selling on uk sites like hifishark. Unfortunately it costs like $125 to ship to Canada and there will be duties and tax. Might as well buy a new center.
Will try to buy brands that are more widespread locally from now on.
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