i have a 5.1 system with a pioneer sacd/dvda hooked to an onkyo tx-595ds receiver running 3 pairs of speakers-2 sets of main/front speakers utilizing an ORIGINAL set combridge sound works ensemble speakers with paired passive subs and pair cambridge model 11 3way bookshelfs/the rear-satellite speakers are pair very old unidirectional homemade 30+ yearolds and a center channel/can the icbm be used with passive subs in this setup and will it be worthwhile