Too much treble - Help! I'm over my head

[DannyA]

Problem solved! After working with Yamaha and DT tech support we identified the problem. The
mid-range speakers in my BP7006s are blown. They still produce sound but the coils are shot. They
are sending free replacements. That caused both problems. The treble and shutting down. Now here
is WHY it happened.
The RX-V3800 specs indicate 140w per channel however the actual "true" output is considerably
less (maybe 60 - 80) when running across all speakers. This means I have to turn the volume up
higher to get the loudness I desire. When I turned up the volume to get the loudness I was
actually producing much higher distortion as well. The distortion is what damaged the speakers.
It was my fault. I didn't understand how the volume adjustment works and the limits of my
receiver. The receiver's lowest volume starts at -75.0db and is near the saturation point at
0.0db. In the old days I could turn the volume to full or almost full on most stereos (yeah. stereo. I'm that old). I just didn't understand I could not do that on the system. I also realized I probably could have chosen a better receiver match for my speakers.

I have more questions now but I'll save those for a new post.

Thank you all very much for your help!

 

[mtrycrafts]

...The
mid-range speakers in my BP7006s are blown. ..

Good that you discovered the problem. I was going to suggest this but decided not to.
That was the only reason for what happened.

 

[j_garcia]

He stated that they would fizzle out at -14dB, which on that model is not extremely loud by any stretch. While not quiet, it's no where close to the -8dB I drive my KEF LS50's (Amplifier requirements: 25 - 100 W) on my RX-V2700, the previous similar series model, also rated at 140WPC, on a daily basis.

Other factors - may have a larger room, system is uncalibrated, etc... Can be plenty of other things that contributed to this, but insufficient power is one that tends to be the most common for driver failure like this.