"Form@C" wrote in message
news
On Sat, 03 Jan 2004 22:11:11 +0000, Roy wrote:
..

During the "average" situation maybe. Lets say a symphony orchestra
burbling away steadily. Then comes the climax. One or two huge peak
demands. Maybe several hundred watts. It is the 5W valve amp's inability
to cope with peak requirements without distortion which is it's
weakness.


But in this case the OP wants a more neighbour-friendly system... :-) We
arn't allowed to aim at full concert-hall volume here! In any case, how
close would you be sitting to the orchestra to reach the dB level for
"several hundred watts" *at your seat*? Remember to take the sqrt of the
power each time you double the distance back. You tend to sit far closer
to speakers than you do to the orchestra in a concert hall. Try it. Use a
*good* low power amp and sensitive speakers. It's no use turning down a
100-200W monster amp because you arn't running them at their best. They
will be set up, probably anyway, to sound best at about 25-50% of full
output.

No that's nonsense. Most power amps are running at a fraction of their RMS
max (let alone peak max) most of the time. Let me quote you an example.

I listened to a pair of ATC SCM10s driven by an AVI 250W/ch amp with a power
meter attached. Listenening at realistic (not thunderous) levels to Sibelius
Violin Concerto, the quiet introduction drew barely a watt per channel with
a few moments of maybe 5w. The orchestral tutti (2 very loud chords) drew an
instantaneous 400W per channel.

Roy.




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