Clean amp CH1, OD CH2, then CH1+CH2 by shawnsommer published on 2013-01-04T23:57:49Z Splitting bass signal to run into both preamps of 1969 ampeg b15, with an overdrive inserted on one of the sides(Carl Martin AC-tone). 1st phrase CH 1 only, clean 2nd, CH 2 only, OD 3rd, both CH 1 and CH 2