How much power is to much power?


When is an amp overkill for a speaker? More specifically, I have 91db speakers and I'm considering two SS amps, one 140 watts and the other 200 watts. Are they both too much? Is it too much simply because you're paying for extra power but don't need it, or because it's a detriment to the overall system sound?

Thanks.
128x128jtnicolosi
You probably like a little bloom in your bass, which is not uncommon. I listen to lots of music with tons of bass and I play in orchestras and bands with "real bass" so I don't like any added bloom.

DF is a technical term that doesn't adequately explain the ability of an amp to control the woofers. If your SET amp had a damping factor of 1000 it still couldn't control many woofers.

Dave
I think ‘power’ is overrated in most situations. It is not necessary to have “1000 watt monoblocks” to achieve good [or great] sound. The Lavardin IT, rated at a modest 50 watts per channel in integrated form has sounded more organized and composed than some 500-watt (very expensive) monoblocks in side-by-side comparisons. It is true that some speaker designs require more power, and there are some esoteric brands that build speakers with these requirements. In your case this is not the case (sorry). But power is not the whole picture. Personally I would never buy a speaker with such requirements.
Baroque_lover probably doesn't need much power because, given his nom de plume, he only listens to baroque music. The demands are totally different from Mahler or even a Beethoven piano sonata.

He's right, he and I wouldn't buy the same systems because we have different priorities. IF you listen to very dynamic music, then power can be very important, particularly if you speakers can use the power.

Dave
Yes, some bloom in the bass is nice. I've found live music has "bloom" too. The question is not if you need added bloom. Rather, if your amp had some bloom, would that sound more like live music to your ears?

The Lavardin amp can indeed sound like 500W monoblocks if the speakers are *very* sensitive and have a flat impedance curve.

My NP100 Platinum feels a bit lack of power when I play Beethoven Symphony No. 9, especially towards the ending. This is a time that I wish I had more power......
A SET amp may not control a woofer at higher SPLs but that has little or nothing to do with damping, which is a function of an amps low output impedence.
TEST:: take a bare driver...woofer prefered. Thump it with your finger. Rings nicely, right?
Now, take a short piece of wire and short out the connections. Thump it again with your finger. Little or no sound, right?
The woofer basically damps itself when its 'load'...the output of the amp, has low enough impedence. The rest goes up as heat.
As for control, doesn't audible distortion play into this? If you had a dual trace scope connected and could compare the input signal and the actual speaker motions, you could visualize it. the traces match?=good 'control'.
Traces don't match? Bad control.