Hello! I found this place when I asked a friend about choosing a preamp and he raved about his C1 with BillD mods. I hadn't seriously renewed my sound system for decades until I visited a friend's house when he was about to move and heard his system. I was amazed by the sound, and wound up buying his power amp (Perreaux PMF 2150B), speakers (Westlake Audio BBSM10), and subwoofer (Hsu Research VTF-3). While the speakers were too big to pass interior design muster, the other components are keepers. The subwoofer and my Dahlquist M-905s sound great together. I look forward to having really clean amplification for them.