On Apr 18, 5:48 pm, "DC" <chudley_d...@[EMAIL PROTECTED]
> wrote:
> "Codifus" <codi...@[EMAIL PROTECTED]
> wrote in message
>
> news:fu6c7602ivq@[EMAIL PROTECTED]
>
> <snip>> I do miss that Onkyo, though. It was less powerful, but cleaner.
At full
> > steam the Yamaha sounds a bit more harsh than the Onkyo ever did.
>
> <snip>
>
> You may have described the audible signs of "clipping" Perhaps your full
> steam is a few two many pounds over pressure for the boiler!
> Essentially clipping produces square waves, initially only on the
highest
> "peaks", but as the overload increases in severity, the impact of the
> clipping becomes clearly audible. During the "is it or isn't it" stage -
the
> amp is still producing an increased spectrum of high frequencies, which
> MIGHT be a worry to a marginally rated tweeter / crossover, but severe
> clipping probably "takes out" the crossover / tweeter as well as
> significantly increasing the power dissipated in the woofer. In addition
> the effectiveness of it's voice coil cooling will be compromised -
spending
> time stopped at both extremities.
>
> My guess would be you killed them Judging the onset of clipping is an
art
> depending on the music source material.
>
> Good luck
>
> Dave
The music source, in my scenario, is key. I love dynamic, powerful
music. Strong bass content in the 40 Hz and lower range just adds to
my enjoyment. From the study that Rene referenced, I can see that I
must have been clipping my system frequently, more due to the low
frequencies topping out my Yamaha, and the high frequencies which are
"riding the wave" and clipping at peak levels.
The Xovers over-heated and that was that. Last time this happened,
both my xovers died and I had no mid-range or tweeter, but all the
speakers themselves were fine.
Now, just one xover died and it took out only the tweeter. Again, the
tweeter is fine as I tested it outside of the system.
A bigger amplifier in my scenario would reduce the clipping, but high
average power levels (which I am bound to explore:)) will probably
cook the xovers again, as the xovers seem to be the weakest link of my
tower II speakers.
Also, I found another source of distortion: my music server. Basically
a software upgrade of itunes led to a hardware limitation in my music
server system.
I'll expand on that in another thread.
Thanks.
CD
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