ralphnoonan, Sure, you can use two subs. One choice might be a pair of Yamaha powered subs. Another choice might be getting a pair of ERA subs, and this is the choice I'd make. The ERAs are marvelous, tight sounding 10 inch woofer beauties for $1000 a piece. The Yamaha subs would be less money, especially if used, and also sound good.
Have fun.
waltcertain
Have fun.
waltcertain