Finally I can demo the COMPLETE classic Black Sabbath Rig! Today I'm playing a 1969 Laney Supergroup through a 1972 Laney/Dan Armstrong 4x12 with the T1976 G12H30 75Hz Greenback. This is the most evil sounding Greenback, which sound like a mix of Greenback and Goodman. I'm using a 2013 Gibson SG Standard Custom Shop and a BSM DM-T treble booster to push the rig.