I'm a tube guy. I run a tubed CD player (Musical Fidelity A5) or tubed phono stage (BAT VK-P5) through a tubed pre-amp (BAT VK-3i) into an 80-wpc power amp (Sonic Frontiers SFS-80). I'm driving Thiel 2.2 speakers which really need and can handle a lot more power but I'm not complaining about the sound. If I step up to a more powerful solid state amp (perhaps a BAT VK-220 at 125 wpc) but keep the rest of the tubed chain intact will I lose the tubed sound that I love? Or more generally, how much of that tubed sound is a function of the power amp?

I'm am unclear how to match a power amp to a particular speaker to get the most power without endangering the speaker. I know it's much better to use a high powered amp than an under powered amp, but how do you know when you have exceeded safe reserves? Say your speaker is rated at 250 watts RMS power handling, they could take much more peaks, so would you be safe with say 450 watts to make sure you don't clip the peaks? Is there a formula to figure this all out?

I've noticed a strange thing but before i continue,my cd player,dvd player and loudspeakers are in perfect condition.
Some cd,especially older ones,sound a bit strange whenever i play them.They sound as if the cones of the loudspeakers are teared.It is a strange sound,like ummm "flutter" and one
has to listen carefully to listen to it. This happens only to 1-2% of my cd collection and the weird thing is,it happens sometimes constantly and sometimes at random.

This post is not supposed to debate the sacd vs dvd audio sound quality.I only want to know if anyone else noticed this sound quality problems of dvd audio. I own quite a few sacd and dvd audios.All the sacd i own sound ok.Quite a few dvd audio are even worse than the same cds.Why is that ?
Is the recording process of dvd audio problematic or just the audio engineers of dcd audio not carefull enough ?