I just had a "d'oh !!" moment... adding wireless to subs is a brilliant move because most of the expense of wireless speakers (the built-in amp) is already there, and you're really just adding connectivity rather than a bunch of expensive stuff.

Very nice.

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8