My recommendation would be to find a mixing board and play with the settings on the B3 to optimize it for that application. The Allen & Heath will have a great EQ built into it but it still can only do so much with the incoming signal if the two aren't playing together well.It's probably me just being rubbish at programming it to be honest.
If it helps, I go straight into the B3 from my Mexican Precision and straight from the B3 to the mixing desk (so no backline, which often makes me wonder if that's the problem, but no-one in our band uses any amps, we're all straight to the desk). The pedal is also in passive mode at the back, since it's a passive bass after all.
Due to the above, is it best to leave the EQ on the desk flat? I argue this point almost every gig with my mate who does the sound, he says the desk has better EQ (it's an Allen & Heath, so, more than likely) but my point is if I use different effects with different EQs then it's just going to be bastardised by the desk is it not?
Would appreciate hearing other opinions on it, I don't think there will be too many people that don't use a backline though.
Cheers,
Martin
While going ampless is becoming standard practice for a lot of professional touring acts it's much harder for smaller bands to go that route IMO. Remember the big boys are using thousands of dollars of rack gear and an extremely powerful PA and spend at least a week on production rehearsals to get the sound right.