2. amps-preamps
  3. 1361045276

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
english210 OP
121 posts
 
Possibly, but it's a Yamaha AVR, hardly audiophile quality, but since the issue is only an issue at higher volumes, it seems to be a power amp issue - a new pre isn't in the cards for now, the room is also the family/tv/movie room.
runnin
397 posts
 
I'm not familiar with Peachtree, but that amp is Class D. In reading some of the previous posts, room treatments are good, but I think that high frequencies are less affected by room. That's why tweeters are usually recommended to be at ear level, they are not as robust as other frequencies. But other frequencies can certainly be an issue.

And sibilance, or a distortion like sound coming from the tweeters, is probably not room gain related. Is there a possibility that your Yamaha receiver is straining at higher levels?
english210 OP
121 posts
 
My thought is the amp is straining, hence the thread. The receiver is running an outboard MX2 amp, 125wpc (although somewhere I read it was 150). Perhaps there's a gain issue between the avr and amp, but as both are Yamaha, I didn't really consider that. All I can say is that movies/tv are usually around -15 to -20db on the volume display. When I'm really cranking it, 2 channel, home alone, etc, I'll crank it up to 0db or possibly higher. the 'max' is +16.5. Does that mean anything to anyone in absolute terms? I understood it better when volume controls were a simple 1-10...
Anyway, since the problem is only a problem for me at 'I have the house to myself, time to let the neighbors know I'm home' volumes, I'm reasonably sure it's the amp running out of power.
bondmanp
1,465 posts
 
English - In absolute terms, no, it doesn't mean much. Coupled with your speakers' efficiency rating and room size, it can mean a lot. IIRC, Yamaha AVRs used to be widely criticized for not having enough output. Especially when tested by mags like Home Theater, the power output would usually fall to well below the advertised output when more than two channels were driven.

I think the best way for you to procede is to either borrow a more powerful amp from a friend or dealer to try out, or purchase an amp from a direct seller or dealer with a good return policy (watch out for "restocking" fees). Then you will see quickly if a beefier amp gets you the results you seek.

If not, report back, and we'll take it from there.
english210 OP
121 posts
 
Bondmanp, ok, so I'll fill in the blanks: The problem I'm having is in 2-channel mode, so the avr's only sending signal through the preouts, the surround speakers it is also powering aren't in the equation. The speakers are notoriously tricky, Infiniity Kappa 7's (but they're far easier to drive than the 8's or 9's big brothers) with a guestimate of efficiency @ 87ish. The room is 12X19X8. I had thought of just trying an Emo amp, but then I read they can be bright anyway, and that's the last thing I want. From the feedback here, I'm 'aiming' for a Parasound, Classe (read elsewhere they are laid back), or Wyred. Emo has the best return policy if it didn't do the job I need, but if they're bright-ish anyway, what would it tell me?
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