it's got 4 in fact, enough for kick and toms.
but yes, I tried them once (jack ones) into an alesis module and they had a mega output level with no chance to dynamics, wish I had more time to check them out.
It has line level inputs
no, that's the 003R that has the 4 line level inputs, not the 003R+
Also, i plugged it into the line inputs on my API A2D, and it still clips like a bastard.
I wish i wasn't too lazy to pack this guy off and return it to sweetwater for a refund.