I picked my bass 750 for $300 used. Great head I think( I do however have a vt bass pedal always on

). I heard that the 750x sounded a little more underpowered then the bass 750 but I never tried one out. With the right speakers this head gets loud. I haven't had a problem playing with loud drummers and 2 guitarists with Marshall 4x12s without me using a single peavey 410txf. I turn the aural enhancer almost all the way down and have no problem with being heard, or felt.