Ouch! The gain controls are the problem. Very few high end amps have them. As Yoda says, "There is another". May I suggest an Adcom 555 or 555MKII or 565 mono blocks with a pair of EVS attenuators plugged into the back of the amps. The 555/555MKII goes for $300-450, the 565s for $600-750 and the EVS stuff for ~$200. Good luck
