I sold my Cary 572s Series 1 (which I loved except for the short life of the power tubes) and bought Cary 2A3SEs. I have Proac Response 2.5s which I also love. However, I found that this sytem simply does not have the dynamic freedom, both high, mid, and low level, that I need to enjoy the jazz and classical music I primarily listen to. Also, the high frequencies are somewhat closed in and lack the right amount of air and extension neccessary. However! I bought a wonderful OTL 25 watt amp(Transcendent Sound, I don't even know the model name) and at $1,900.00 direct from the manufacturer, it is an amazing bargin. I do not use a preamp (I use a Creek Audio OBH12) and I discovered a slight peakiness in the highs. About a week ago, just for fun, I bi-amped my Proacs (Transcendent on the woofer and the Carys on the tweeter) and the sound is almost wonderful. Does anyone know how to, when bi-amping, increase the tweeter output by maybe 2dbs? Or maybe I should check out the Silverlines and keep my Carys. Anyway...