Originally posted by SkyRock
Place a SM-47 in front of your amp and turn your volume to the setting that gives you the best sound when it's just you and the amp. Then let the PA guy control your overall out front.
This is what I use when recording and a similar set-up is used when performing live. I use the house microphones set up in the same fashion... depending on the mics being used.
Shure SM 57 microphone pointed at the centre of one of the speakers on an angle (not directly at it).
My amp rig is a Laney VH 100R tube amp through a Marshall cab (which, basically, is loud enough to not mic at all in smaller venues). I run my guitars through a BOSS ME-50 effects pedal.
Basically, most people only ever plug
bass into the PA. This is called 'DI'. You run a mic lead out of the DI jack in the back of your bass amp.
My band has used this to great success in the past, as the guitars are quite harsh and abrasive... DI'ing the bass maintains the clairty of the signal from the amp.
For your situation the microphone is the way to do, definitely not DI.
You'll get away with playing your amp at it's 'sweet spot' as far as volume goes (provided that is not overly quiet) and the PA will provide the volume.
