I opened the base to fine tune it. I see 2 tuning posts. Is the one near the top towards the power input and db9 port the one to use? I know how to do it by holding down the horn button on a cab1 and leave it in the middle of the 2 extremes. I have done this before but see 2 tuning/volume pots. Not sure what these are technically called.
Thank you for your help.