Question about Denon AVR-2307 Receiver

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Denon AVR-2307 Protection Circuit Activated permenantly

I have a Denon AVR-2307 surround receiver with Mirage Omnisat V2 Series floorstanding front speakers and the Omnisat V2 Centre speaker plus Niles HD6 in wall surround speakers.

Now for the second time the receiver has gone into protection circuit mode. The first time the resistors and diodes were replaced in front left and centre output stages under warranty.

Now that this has happened a second time I have been investigating and wonder whether I have an impedance mismatch issue with the receiver and the speakers.

The receiver is rated front A,B at 100w + 100w (8 ohms, 20hz -20 khz), centre 100w (8 homs, 20hz - 20khz), surround is the same.
According to the manual, the impedance on all the speakers is 6 - 16 ohms.

The Mirage front speakers are rated at 175 watts and their impedance is 8-ohm nominal and 4 ohm min. The centre speaker is the same. The Niles surround speakers are rated at 10 to 125 watts per channel and their Nominal Impedance is 6 ohms.

Both times when this has occurred it has been whilst playing music DVD's at high volume, but not extreme. So, I am wondering if the amp has had to be pushing too much power over the period and it has clipped and damaged the circuitry? Can you advise if this is possibly the case.

The system was sold to me by an authorised Denon dealer in Adelaide South Australia and if there is a mismatch I am wondering if I have any comeback on them?

Thanks,

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The speakers are 4 ohm speakers, a guy on another chat site sent me a link to the impedance curves http://www.audioholics.com/reviews/s...t-v2-fs/page-4

He agreed to that there was a mismatch as the unit has plenty of fresh air around it, plus all the speaker cables have been tested and installed correctly.

So, off to the store where I got it from tomorrow.


Posted on Jan 04, 2009

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