Hi JCkeeys:
I have been using the ZX1-90s for over a year, I have 2 pairs, GREAT speakers !!, I did recommended them to a colleague of mine and he also got them, he got the passive subs that also have the pole for the 90's.
I use the Roland KCW1 powered sub, that gives me independent control on volume and also how much "Cut", this combination works for me VERY well.
I did replaced my Yamaha's Sm12 V, one of this weights more that 2 of my ZX1-90s. I did compare them side to side, to ME, is amazing how an 8' woofer gives so much sound ALMOST like the 12's in the Yamaha's, anyway, that's why I also had the Roland active subwoofer.
I will check the SB2a, 350w vs the KXW1 200w, I need to hear that. THank you for the update ! ;o)
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mdorantes
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mdorantes