Treble died on the HK980- adjusting the treble up/down does nothing, sound is muffled. The amp treble died and killed my KEF Q50 tweeters (or maybe the treble crossovers). Tested HK with headphones- but no treble in phones. Tested KEFs on another amplifier- tweeters definately killed by the HK980...Can the HK be repaired?
Probably it can be repaired. I'll caution you that HK customer service is terrible. If I were you I'd replace the KEF tweeters and look for a Marantz amp or receiver and if it needs repair do so. I worked on a friend's HK amp (converted it from 220 to 115 v AC) and wasn't impressed with the sound in the least. There is nothing so sweet and the warm Marantz sound.
You can always call HK at (800) 422-8027. They will tell you their authorized repair locations.
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SOURCE: treble and bass function
In looking through the service manual for this model, I see a Tone Switch that allows you to bypass the tone circuits, and it may be the one all the way to the left of your front panel. If that's not it, I would get out the owners manual and see what they suggest. I doubt that you actually have an electronic malfunction with your unit.
SOURCE: harman kardon
Orastie
Wow, general problem here, but the most near your problem could be, power failure, or the Power adapter is bad, or a energy failure at home, time to buy a new adapter.
Carl
SOURCE: I have a Harman Kardon
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SOURCE: Harman Kardon Soundsticks I - back of tweeter has come off
I took a screwdriver and pried mine open (at one of the ends, not the center), snapped my tweeter back in place, took model airplane glue and a Q-tip, covered the ridge side (not the grooved side) of the case with just a little line of glue and stuck them back together. Worked perfect.
cheerio.
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