Ive got a few gigs coming up and will need to have some kind of amplification. The guitarist has an all in one PA system a maui 5 (like the Bose system but cheaper). We had a practice session at the weekend with drums and bass and i used this PA with just one mic a sennheiser e845. Everything was working but i was getting hardly anything from the vibes through the system (The mic was above the vibes and fairly close). So what mics would be best to use and should i still use the Maui or go through a different amp?