I just purchased an HK AVR 645. The voice coming from my center speaker just doesn't sound crisp when watching TV shows, especially Lost. I am using a monster optical cable going from my cable box to my receiver. have tried tweaking every area I can think of to try and fix this problem. Does anyone have any suggestions on what i can do for this problem? The speakers are high end Focal's that i just recently purchased so I do not think it is the speaker. Any help would be great. Thanks
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Re: Center Speaker sound just not right
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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Your HK DVD probably has outputs for left and right audio and video (possibly color coded red, white, and yellow). These should connect to the corresponding DVD (or VCR) inputs on the rear of your AVR. When you play a DVD with your AVR set for DVD/VCR input, you should hear all of the stereo audio (there are no "missing tracks"). Next, review your speaker connections. They should be connected + terminal to the corresponding + terminal on the AVR, etc. One or more speakers may be connected backwards. If your AVR has speaker system A B provisions, be sure that speaker (system) A only has been selected.
Assuming that you mean Dolby digital 5.1, confirm that you have a center channel properly connected and perform the following;
Using the remote, enter the menu on the receiver and navigate to the selection labeled "LEVEL." Toggle through the selections until you reach the "CENTER CHANNEL". You will be able to use the remote to increase the volume of that channel in .5dB increments.
If you are passing video thru the monitor out to the TV, this will go much easier. First Press the GUI Menu button on the remote. If connected to TV, on screen menu will appear. Go to Manual Setup then (right arrow on the 4 way with the ok in middle) Speaker Settings then Speaker Select then go to Center Channel arrow right again and make sure it's "On" If it is, then go back to the main speaker settings and toggle to Speaker Level. Then select center channel and arrow right turns volume up. If you still have no audio, post a comment and I can help you troubleshoot further. Hope this helps
When watching TV or VHS the sound should be stereo and therefor come out of the the 2 front speakers. I suspect you now have sound out of the left front and the center speaker which indicates you connected the center speaker to the right front speakerterminal and the right front to the center terminal.
Just check if all speakers are connected to the correspondent speakerterminal.
If this is correct and the problem persists, try to connect another speaker to the right front terminal to see of the terminal or speaker is not working properly. If another speaker does work on the same connection, your right speaker might be damaged which might not be heard when listening to 5.1 because of the surround sound.
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 have the same issue if I connect my digial audio cable from the Yamaha receiver directly to the HDTV. But, I get all 6 speakers working when I connect the Yamaha receiver directly to the Comcast HD box (instead of TV).
My guess is You have dried out electrolytic capacitors causing failure. These receivers when they get over 6 years old start drying out fluid in capacitors especially on regulator p.c.b. causing noisy supply lines. I work for Authorized service center in Michigan If you need repair and Shipping to Michigan is economical let me know email@example.com