Yamaha DTXpress/DTXplorer/DTXtreme

Ok, what I meant by base amp above are the bass amps with the piezo 
tweeter built in. That's the kind of base amp I'm asking about. Seems 
like it would go to about the same highs as a keyboard amp would, but 
lower lows, if you know what I mean. Is this true and can this type 
of Bass amp (12"/15" woofer, 1" tweeter) work and be up to the 
challenge of an e-drum kit? In a sense of playing along at home or 
playing at a small gig, i.e. coffee shops, country clubs, small 
rooms, etc.

-Zack-

P.S. Sorry for the 3 in a row posts, maybe I should think about 
eberything I need to say the first time around lol. =P