Question about Harman Kardon AVR 300 Receiver

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Harmon Kardon AVR300 center speaker channel has distortion. Have replaced the center channel speaker and cables. Still have distortion. No other distortion in the remaining speakers or s/w.

This condition started about a year ago. I thought the center channel speaker was damaged due to it being dropped. I replaced with a new Infinity PC250 and the distortion still exists. I connected the old Klipsch center speaker to another receiver and there is no distortion. The problem appears to be with the HK AVR300.

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Posted on Jan 02, 2017

SOURCE: cannot get dts from my Harmon Kardon AVR 300 via my Blue Ray

I'm not sure if this solution is still necessary however:

I own a H/K AVR300 and have a PS3 hooked up via HDMI to the TV and Optical TOSLink to the receiver. I have no troubles selecting between DD 5.1 and DTS 5.1. I can even select trueHD whatever format but I can't detect an audible difference, I think that mode might be downgraded back to regular DD5.1...

Hope this helps...

Posted on Jun 10, 2008

  • 1 Answer

SOURCE: Audio problems using a Playstation 3

First try ensuring that "OPT 1, 2, or 3" function is selected depending which one you are using on the H/K 146 (see manual for selection instructions). Next please ensure that the PS3 audio out set to "optical" (Settings/sound settings/audio output settings/digital out+DD 5.1). That should help.

Posted on Dec 24, 2008

Tekmekanik
  • 34 Answers

SOURCE: static and popping from Harmon Kardon AVR 340

Hi,

You seem have a problem with a component in that channel, the bad news is that it is hard to fix that type of problem (you would be better off if the channel died). All of the components in the final output section are part of the same audio loop (per channel), which makes it hard to find the faulty part.

Sounds to me like a bypass or coupling capacitor is faulty or need to be re-soldered, either way to fix this problem you should take it in to a repair shop.

I hope that helps and sorry for the bad news.

Posted on Jan 29, 2009

  • 4234 Answers

SOURCE: Harmon Kardon AVR300.**protect** blinks when

The protect message means that the outputs are shorted. This is a fairly common problem that can easily be fixed by any shop that handles audio gear. Expect a parts cost in the $20-$40 range.

Dan

Posted on Mar 17, 2009

lock123
  • 6831 Answers

SOURCE: I have an AVR 335 less than 3 years old no sound

Hello

Yes, there is something you can try, to know where to look for the problem if this happens again. If the receiver is still under warranty, just send it back, otherwise, open up the amp and trace the path back from the speaker channel to the capacitors on each channel, this is usually the problem(you should be able to see if it is blown, cheap to repair).

If all the channels went out at the same time, there is something wrong with the central unit, to repair that, if it is not the above problem, cost expensive.

Hope this can help you.

Kind regards
Andrea

Posted on Nov 09, 2009

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The protect message means that the outputs are shorted. This is a fairly common problem that can easily be fixed by any shop that handles audio gear. Expect a parts cost in the $20-$40 range.

Dan

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I'm not sure if this solution is still necessary however:

I own a H/K AVR300 and have a PS3 hooked up via HDMI to the TV and Optical TOSLink to the receiver. I have no troubles selecting between DD 5.1 and DTS 5.1. I can even select trueHD whatever format but I can't detect an audible difference, I think that mode might be downgraded back to regular DD5.1...

Hope this helps...

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1 Answer

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If the optical cable was bad, the sound would be distorted period. The optical cable (whether coax or fiber) just simply carries the coded audio to the receiver which in turn decodes it. I have never heard of a signal just screwing up the center channel, and I've been at this better than 30 years. Not to say it's impossible, but very unlikely.

Did you try swapping speakers? Move the left one to the center and the center to the left. Does the center remain "distorted"? Does the left become "distorted"? If the center remains distorted, the receiver's center channel has something wrong with it. If the left is distorted, the speaker has a problem.

For the future. it is un-neceaasy to purchase expensive cables. In fact it could make things worse. The claim to fame of most expensive cable manufacturers is the gold plating on the connectors. Unless the bioth sides have gold plating (receiver, cable box) this actually creates a capacitive reactance between the different metal types. FYI-capacitive and inductive capacitances are the basis for designeing cross-overs, filters, etc. So basically, an undesired filtering effect is created. This applies to speaker cables, audio, video, etc....

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Hello there

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4) RMS your Spks, for replace. or warranty.
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