Non-feedback amplification topology and frequency


Is it true that non-feedback topology amplification is prone to frequency limitations if not matched with the absolute perfect speaker system?
I'm trying grasp how to get a flat sound from my very much loved new PL5. I have resorted to EQ, that never mentioned term on these forum, to bring back the ultra-highs of cymbals and bells etc. I've also rolled the pre-tubes and switched out my ICs. Still very much a frown freq graph.
I'm willing to get new speakers to help this amp deliver on its promises. Focal seem nicely high in sensitivity.
jmacinnis
Ralph,

That was a VERY cool video of the Fisher Z-Matic. I'm constantly amazed of what was done...back-in-the-day!

Regards,
Sam
Dracule I see this feedback issue hit a nerve as you started a whole new thread about essentially the same thing as this one. I'm quite ok now with Atmasphere's description of the facts and history of this topic. It is up to debate only whether or not you subjectively like the sound of what comes from feeback or not, and isn't that just taste in the end? I prefer vinyl because of the way my ear reacts...it sure isn't the highest quality choice in terms of specs. My original question was just, Do you need to be more carefull when selecting speakers with non feedback amps. Answered.
Today I am the happy owner of a beautiful pair of Cantons that are fully engaging and blow my old system away. It would be fun to play with the feedback knob on your amp though :)
"Ultimately you have to be more careful of your speaker choice; this is doubly important because a speaker that requires the amp to have feedback will never be able to sound like real music- it will at best sound like a good hifi."

Absolute statements like this are bound to hit some nerves. That's what helps create discussion, which is usually where a more complete story might become apparent.
Mapman, they do, but even in high end audio we have to deal with facts occasionally :)

The reason I made that comment is that an amplifier that violates one of the most fundamental rules of human hearing will never sound like real music. Its not so much the failing of the speaker as it is the amp.