How to evaluate amps that are not broken in?


I'm expecting to demo Belles and JoLida amps next week at home, and both units are new. Can I assume that if I like the sound of an amp now, I will like it just as much after it's broken in? How does one account for this variable when trying to decide if a new piece of gear will be synergistic with one's system? Thanks!
stuartk
If a component breaks in when no one is listening , does anyone know it ?

Hmmm .

;-)
This is what dealers are for; good ones have burned-in examples of the things that they sell.

Lacking that, perhaps you live in West Texas, then it is correct to assume that components will only get better with burn-in; however, some really outstanding components can sound ugly on first hearing.

You're auditioning a couple of good brands, so you'll likely be ok. Particularly listen to music with lots of low bass. Can the amps control your woofers? Some will not and can be eliminated. As for the mids and highs, it's a crap shoot until the amps burn-in, IMHO.

Dave
Dcstep, I've been told that Alan Yun, Silverline audio speaker designer, particularly recommended Belles ... at least until he began building his own amps! My dealer is just now starting to carry Belles (I will be his first Belles buyer) and was unable to get hold of a burned-in demo unit. I will keep what you suggest re: low bass in mind.
How can you keep a burn-in anything from customers like me.
Nice guy from Audio Connections N.J almost lost it when I ask him to sell his demo that was breaking in for few days ( my friend that was there with me bought one. This is just when Rega Apollo started to ship). After going back and forward for good ten minutes he gave up. He didn't have to but he did. Nice guy. Nice place. Good people. I got my new Rega playing that night.
So, as you can see, with bloody bastards like myself it's not easy.
I bought the Maggies for my 2nd system from him - he was most accomodating, I agree!