1) is this a good idea/feasible? I have a pair of b&w cdm1's and a velodyne sub I want to hook up to a power amp only. 2) If I can do this are there any power amps with optical Inputs? The chrome cast audio has optical out i would like to utilize. 3) Are there any power amps out there with sub out/ monitor out? That way i don't have to run the speakers through the sub. regards,