can a new amp amp tame my speakers?


Just spent some time listening to what I've been planning to upgrade to for main speakers. PSB Synchronys. The Imagine T2's are close, but slightly veiled in comparison. My current, but old, Infinity Kappa 7's really don't give much away to the PSB's. My amp is an old Yamaha MX2, 125wpc, and I've heard them described as bright or harsh, and that's the only complaint I really have with the sound now. Can a well-chosen amp tame the highs on the Kappa'a, which use a ribbon-style tweeter? Or is the 'taming' I seek only going to happen with a speaker upgrade. I honestly don't mind upgrading the speakers, and fully expected to, but after today's auditioning, I'm wondering if I'm going to get that much benefit from that level of investment. $3500+ is a healthy chunk of coin for benefits of slimmer profile and tamed highs. In terms of imaging, weight, and bass, the Kappa's are equal, imo. The system is also the theater, but the avr can power the surrounds, so an amp upgrade could be 2 channel. A power boost is a must too, as the current 125wpc isn't enough for when wifey's not home and the volume gets wound up ;)
english210
Well it seems in 2 channel, my speakers are still full range, so perhaps that's not factoring in, however I found last night one of the Polydome mids is blown, so first order of business is to replace those.
I found some reviews of Odyssey amps, and talked to Klaus from there, and he swears his amp will make my speakers sing like never before...even with less wpc than I currently have...this ain't getting easier. Time to fix the mids, and pull the trigger on something...the only thing I know for sure is that there's no right answer..
A used Butler 2250 would sound good with the Infinity's, I would think. Lots of power and smooth top end.
Found some reviews on that, and it does seem like a nice match. A little pricier than I was planning on, but not totally out of the question used, there's a couple here used for $1750/1800. The Odyssey is still leading the way though...we'll see...
Thanks again
Just a thought:
http://app.audiogon.com/listings/solid-state-conrad-johnson-evolution-2000-2013-02-12-amplifiers-19464
Oh Boy, more choices :) - at least that is a loal pickup in PA, so no real temptation there. I know nothing about tube amps, or the maintainance involved, whereas the Butler supposedly gets around the maintenance issue by not driving the tubes to the max...

It seems tubes would smooth out the highs, though, is that the consensus? I'm wondering how much of the objectionable highs I have is from the amp running out of juice. Does that make the speakers sound that bad, and therefore, a 'real' amp with 'real' current would eliminate the problem? Or is it a speaker issue that just comes on at high volumes, and needs an amp that's softer in the highs to reign in a problem inherent to the speaker. As I've said, I have no objections to the sound at low-mid volumes, just when I'm cranking it up. Perhaps the ribbons in the Emit tweeter are heating up due to the amp running out of power, and that's why they sound bad, or will they do that at high volumes even with more (enough?) power?

My thinking is, if the speakers are inherently flawed in that area, and even a 'good' amp doesn't fix the issue, then the speakers needed replacing anyway, and anything I get would need a better amp than I have now. So a good amp now (first) isn't a waste. If getting an amp does fix the problem, then I've saved a significant outlay on new speakers. Klaus at Odyssey swears up and down I'll be blown away by what my speakers sound like with his amp, even though the wpc rating is about what I have now...

I suppose I'm not really looking for a amp that's 'softer' in the highs to counteract the speakers, but rather hoping that the objectionable highs I have now are because of the amp I have now, and therefore a better amp will eliminate the problem. I don't want to correct a speaker problem with an amp, but correct an amp problem with an amp.