I have found myself in the position of having to sell my Bryston 4B NRB amp. As I noted in my post above (slowhand) I use this amp with a Audible Illusions M3A and it sounds great. I have Thiel 1.5 speakers, which are not the easiest speakers to drive and the Bryston not only has plenty of power, but mates very well with the M3A preamp. This amp looks as if it is brand new and sounds like it to. Add the balance of a 20 year warranty and you can't loose. Let me know if you are interested.