Yep, Murder One is enjoy a temporary "retirement". Lemmy uses two of these amps on stage with the same cab and effects setup on both amps, all though the 4x12 cab has a grille cover over the speakers where as the 4x15 doesnt. the retail 4x12/15 (in the above pic) are both exposed speakers at front. and they are loud, clear sounding (like the RAR 04 sound), and the 4x15 really gets your teeth rattling