i've own this amp a long time, i use i for both, bass and guitar.
for bass i use a 4x10 ampeg cabinet and for guitar a old 4x12 bass cabinet.
it is defenitely NOT nessesary to mod this amp in any form.
i never had such a kick-ass metal amplification before.
i use only a distortion-pedal as preamp and it is deep and angry like hell,
better than every guitar amp i tested before and i had before.
but i wonder that this babys are worth so much money.
1500-2500$ is this real???
i mean my amp is in very good condition, but SO much money.
ugh! im rich!!! i buy the world!