Hello, I'm a newbie here. I'm considering getting a new pair of bookshelf speakers for my bedroom, I'll probably get Athena As-B1 since it's cheap and it has good reviews. However, I don't own an amp, so I found a working Sony TA-A571 in the attic left by my former roommate, is it OK in terms of sound quality?
I guess my real question is: will it compromise the sound quality a lot if I were to power a pair of decent low end bookshelf speakers such as the AS-B1 with any amp?

I'm willing to buy a cheap and decent amp to match the AS-B1 if I needed to, but only if it makes quite a difference in sound... So any suggestion is also appreciated. thanks!