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Harman Kardon HK 610 only playing out of one speaker

Hi! Anyone know anything about this amplifier.  Mine has decided to only play out of one speaker on all channels except the CD channel and I've swapped the speakers over already, it's definately not them.  Could it be dust inside?  Will I kill it dead if I even attempt to open it up and have a look?  I don't really want to throw it away and places that I've rung to fix it just tell me to get a new one. I'd appreciate your thoughts. Kelly

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Then only use the cd input for your output you may have to swap input wires from different sources as your tv audio output or tape output or tuner otput then just leave on cd and enjoy.
GOOD LUCK
BIGRED

Posted on Jun 21, 2008

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I have a Harman Kardon HK990 which throws an error #005 if I switch it on with a digital input connected. If digital input is not connected, it turns on without any error and all buttons work as expected -...


1.Is the fault caused by an optical or coaxial input or both?

2. Have you tried a Firmware Reset? (press "Level Settings" button & "Speaker 1" together.

3.Do you have a Service Manual (I have pdf!)

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Jun 09, 2012 | Harman Kardon Harman HK 990 Amplifier

1 Answer

How are you? For HK990,How to do bi-wiring connection of the speakers? thanks


Sabve your money - it's BUY-wiring.

http://www.harmankardon.com/EN-US/Products/Pages/ProductDetails.aspx?PID=HK+990

http://www.harmankardon.com/resources/Brands/harmankardon/Products/ProductRelatedDocuments/en-US/OwnersManual/HK%20990_OM.pdf

Bi-wiring does nothing but make you use twice as much speaker wire for the same electrical effect. Bi-amping assumes there are deficiencies in your electronics that must be worked around, again by using more speaker wire and separate amps.

Do some reading on the web about "bi-wiring".

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1 Answer

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Possibly lack of ventilation or excessive volume through difficult speaker loads.

http://media.onecall.com/Image_Products/Harman%20Kardon/harman-kardon-hk990.pdf

See page 6.

IMPORTANT: When connecting two pairs of speakers, determine the impedance of each pair

by looking on the back of the speakers, in your owner's manual, or by contacting your dealer or manufacturer.

You can listen to two pairs of speakers at the same time ONLY if the impedance of EACH speaker is NOT LESS THAN 8 Ohms.

WARNING: Do not play sets of speakers simultaneously except as recommended above.
Amplifier may overheat.

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1 Answer

I own my harman kardon 620 amplifier for about 8 years. Now the sound from the speakers comes on and off intermittently. I have connected and disconnected all the cables to the speakers but it still has...


The problem is in the audio circuitry, there are bad solder joints on the board that need to be addressed, from your description it is a intermittent issue with the sound. Since this a high end unit I recommend a top audio technician to work on your amplifier, and I suggest not using the system until it is repaired because the risk to the audio output parts getting damaged is high and they are pricey.

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