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
I'll call Parasound, thanks. Sounds like your issues were similar, and solved the way I'm hoping to solve mine...the measure of a man's intelligence is the degree to which he agrees with you? ;)

The AVA Synergy looks good to - listed to be laid back and 'easy on the highs'. Looks like my budget will be $1500-2000.
Oh, another question, brought on by looking at the amp options - Should I get a stereo w/225-250wpc, or for example 2 Halo A23's and bridge them to mono? W4S also has the mono options, so any opinions on that? I can't bi-amp the speakers, but I can use one amp per speaker.
I would suggest the new W4S MAMPS. Talk about taming! They make my Paradigm V1 S8's just sing. So smooth and refined. These speakers have never sounded so good. They eliminate all aspects of the forward and brightness of this speaker that the V1 tweeters are known for. The Spatial Quantum cables are the perfect match for these amps. Even listening to internet radio is enjoyable.
Ok, thanks.

So it's the ST500 vs Mamps from W4S.

The AVA Synergy 450,

or the Parasound 2250 vs HCA2200II (I'm reading that the HCA is 'better' than the New Classic Line).

I emailed Parasound last night, and the President emailed back with his advice within a couple of hours. Good sign for how they treat customers! Can anyone comment on either the comparisons within brands, or comparisons between the brands?
Correction, my amp is a Synergy 450 there is no 550.
In any event, doing a marvelous job right now in hearing all the instruments in Brahm's 3rd, not just the big clump my Oddesy Statos gave me, sweet as it was.