I recently sold one of my GFA-545's on ebay, but before I did, I wanted to test it out to make sure it still worked. At first I was going to throw it in a secondary system with some Monitor 5B's, where it would be perfectly comfortable, but then I thought, what the frick, let's see what she can do in the main system.
So there she is, this little, dependable amp, powering my giant Magnepan 3.7's. These speakers are NOT easy to drive. 4ohms nominal with a sensitivity of only 86db.
When I first started playing music I was VERY cautious with the volume knob... gradually bringing it up to the audible spectrum. It sounded good. Little more volume. It sounded better. Little more volume... wow, this sounds really good! Next thing I know, I'm running at full-on personal reference volume, and it sounds great!
My first thought was "I can't believe how good this little $125 amp sounds!"... which was followed by "Why did I spend so much money on my BAT when a $100 amp sounds this good?!"
Well I put the BAT back in and immediately remembered why I dropped the coin on it... but needless to say, the GFA-545 was very impressive.
I will definitely be keeping at least one in the back pocket. This amp must represent the ultimate bang for the buck on the used 2-channel amp market.