I just started playing some HEAVY music with some awesome, awesome dudes. Very happy to be finally playing the stuff I’ve heard in my head for the past decade (give or take). The rig WAS a P-Bass w/ Basslines > Darkglass B3K / Alpha Omega > Sunn 1200s (Fender-reissue 1200W hybrid head) > Barefaced Six10 cabinet. Loads of gain, big chords in Drop-C including some power chords, add-2, etc. The Sunn needed a new power button (wouldn’t turn off) so I took it in. I fired up the KXB500 in its stead and we were all blown away by the improvement in tone. More clarity, more low end, just all around better tone. Pretty funny considering I have about $800 into the Sunn and got the Kustom on a whim for $100 at a used store as a backup. Such a good amp... The Sunn is now up for sale. I’m sold on the Kustom head.