That was my thoughts too. The only remote Radio Shack A/B switch is for cable and not RCA.

The subs are a pair I built, 10", about 2.5 cubic feet, ported & tuned to 28 hz if I remember right. I used to power them with a 25 year old 63 wpc Technics (my 1st, I bought new) receiver before Outlaw when I also had a 120 wpc Sony receiver. 100 watts each is plenty even compared to the 300 watts each to the 4ohm Maggies which are known power hungry & still rather inefficient. (but I love 'em) I still actually have to cut the subs 5db to get 'em flat with the Maggies, but none with the superzeros.

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Thanks, Rick