Been thinking about this for a long time and would like a professional opinion. I have three bass guitars - - all Ibanez -- and a 15W Acoustic amp. 2 of the basses I own have their own 3-band EQ (Bass, mid and treble). Obviously, the amp has same (low, mid and high). What is the "proper" procedure - do I turn all the knobs on my amp down and adjust EQ on my bass first, then adjusting on the amp for tweaks? Or, the other way around? Would like to hear a professional opinion.