Selling this sweet amp due to a change in audio direction. Used in bi-amp duty for Emerald Physics 2.3s and it worked superbly. Best digital amplification I have heard. Meticulously constructed by a DIY-pro audio buddy of mine. Cardas copper binding posts, RCAs, a pure copper IEC from Mojo Audio, etc. Cost of parts alone was $600, and thus asking $600 obo. As a fYI, I am liquidating my entire system (Emerald Physics speakers with Sistrum Audio points, amp, Signal wiring) and financial incentives are in place for a sweet, full system deal.