Ok. If your heard audience the second time, then the system gain was higher, and/or the
audience was louder than before.
Also there will be different distances from the mics
to the newer speaker positions.
As for mics, it won't make a huge
difference, though I would expect to get a noticeably better result with my CAD 175s,
rather than my C1000s, in that kind of situation ... See if you can borrow a couple of
large-diameter cardioid condenser mics.
Below are some ideas with a diagramme
of the room and band as I understand it.
Grey boxes: speakers on the walls behind the beam, pointing
inwards and down toward the lower-rear of room.
Even better, do the Green
arrangement with the box on the back of the beam, pointing towards the lower-rear of the
room. Either way, the idea is to reduce comb-filtering reflections off the walls and
ceiling. Try both ways; see which is most even.
Remember you are re-enforcing
the acoustic sound from the band; often a centre-position can sound better than L-R
arrangement, and also any delay you may add (see below, the arrows will make sense!) will
be accurate for more listening positions in the room: You can imagine the arc from the
centre-speaker is more representative to all the musos and the PA with the green arrow.
Now compare the lengths of the black & grey arrows by contrast. You can see they are
very different in lenghth ... but you can only choose one delay!
you can, delay the PA by the distance shown by the black (or green) arrows in feet;
let’s say it’s 8 feet – that makes it roughly 8 milliseconds to align the speakers
acoustically with the band. This means that (hopefully) the PA will ‘disappear’ and
the band will be heard throughout the room much more clearly. You’ll get the best
results by listening and adjusting the delay to around about (or a bit more) than the
'ballpark' figure given by the distance from the PA to the band. A second-hand speaker
management/crossover box would be good for this, and you can also EQ out (just a few)
problem feedback frequencies you will get with these rather useful devices. Hope that
makes some sort of sense!
-------------------- My way of being a masochist