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Searching for the new Sherlock Holmes! My 2 Year Dilema.Someone Please Help!

post #1 of 4
Thread Starter 
To basically sum it up I've had the same recurring problem, exact problem actually, with my fourth receiver now! One Pioneer vsxd412, one Onkyo 303. and now my second beloved Onkyo 504.My Pioneer lasted about a year before showing horrible symptoms.
This problem which would soon repeat itself with other receivers is Overvoluming? and Overbassing actually terribly so. The increase in volume I would get was about 20% and the bass or LFE astronomical . It felt like there was an earthquake in my room.The sound Quality alone would hurt my ears for days. So lets say I would play something at volume level 40 Before the problem,after the problem occured I would have to turn down my receiver volume to 35 to get it to sound the same decibel level.The quality of the sound did not sound quite right though and would hurt my ears.For my bass problem i turned down the tone but my walls would still shake.
My Onkyo 303 went on to last 6 months before the same problem happened. 3 months on the first Onkyo 504 and now 3 months on my second.SAME EXACT THING!! I've asked alot of people about this problem and no one has heard of anything like it.
To prevent this problem from recurring I've tried almost everything.I had an electrician check my wiring, bought a power conditioner, new speaker wiring and before my latest issue new fronts and rears.A new optical cable and dvd player has not stopped this problem either.So whether my dvd or cable tv coaxially hooked up to my receiver is used the same crap sound occurs.
My setup is 5.0 or hybrid 5.2. My fronts are my subs. Ive used klh tower and currently next generation classic cerwin vegas both with 12" woofers. My center is still cs2 polk and my rears used to be pioneers while now i use klipsch. I use 12 gauge wire for the fronts and center and monster for the rears. All speakers are 8 ohm.My crossover was 100 now I use 80.Ive tried and experimented with both small and large settings for my rears and center. The same problem still occured.
My setup while it works sounds great. I do not want to add a sub to my mix even if it woud take a load off my receiver. i usually get plenty of good bass from my cerwin vegas.
When i first sent my receiver to get serviced the technician told me he could not find anything wrong with it. I hooked it back up and of course it had the same problems.I remember now the serviceman telling me with pride how he did a power on test, reset the factory settings and checked the voltage levels coming through all channels. Case closed nothing wrong after all that good as new right? The good folks at circuit city at least have gotten me new receivers these last 2 times but I hate having the label of "the return guy"
ANYONE with an answer please help even if you only make a guess would be greatly appreciated.
post #2 of 4
Same speakers? I think I'd go a head and give different speakers a try?

I have been doing audio for nearly 30 years and have not encountered the same issue you are experiencing.
post #3 of 4
I know of no way for a receiver or set of speakers to fail and produce the symptoms you are reporting.

The most likely cause, given what you are reporting -- and in particular given that it happened with different receivers -- is that someone in your household is deliberately or accidentally changing the speaker configuration/volume settings in your receiver.

Bass response can also vary dramatically due to what would seem minor changes in your listening room such as whether doors or windows are open or closed.

I suggest you get a Sound Pressure Level (SPL) meter -- the one from Radio Shack is the one everyone uses and it is quite inexpensive -- and a calibration DVD such as Avia or Digital Video Essentials (DVE). Use the SPL meter, along with the test tones in your receiver and the audio tests found on the calibration DVD to re-check the speaker configuration and level settings in your receiver.

For bass, be aware that depending upon how the bass couples with your room, bass response can vary significantly at different listening positions. So move around a bit while measuring bass and see if you have dramatic resonance peaks or cancellation dips. If so, moving your bass speakers small amounts may help, or you may need some "bass treatment" on the walls.

Also be aware that some receivers have "temporary" audio adjustment controls accessible from the remote that do things like bass/treble adjustment or even do temporary volume changes for some speakers. LFE boost/cut may also be found. It is easy to hit such adjustments by accident on some remotes. Reread your owner's manual and make sure ALL such adjustments are still at the flat position (no boost and no cut). If you are using a programmable remote, recheck to make sure it is not triggering such changes unexpectedly.

Some of these adjustments may be found as adjustments specific to one or more audio listening modes -- such as PLIIx. So dig deep in the owners manual and double check that ALL of them are still in the default settings.
--Bob
post #4 of 4
Thread Starter 
Thanks for the replies so far. To answer some questions I had already replaced my speakers while having my problems. As far as settings go like I said before the sound would be perfect before the problem happened. I can get a new onkyo 504 right now dial in the same settings as my one with issues and the overbass and other issue would be gone. SOMETHING IN THE RECEIVER IS WRONG.
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