Here's my report from the performance on Saturday (April 23, 2006).

I set up the mics, mixing board, reverb
and compressor and finally the PAS. I tested
the sound level going to the back of the
room with a CD of similar music. The CD
sounded fantastic with clear uniform
volume levels at least 80-100 feet into
the room.

I then tested the vocal mic, by having a
friend sit in the back and I sang into it
(at the same spot the artist would).

At this time, the PAS was behind my right
shoulder about 4 feet back. I noticed a lot
of echo with the reverb unit turned off.
I then moved the unit behind where the
drummer would be sitting, (just as ST
suggested, but slightly more forward
and angled so that the PAS tower
would point towards the center of the room;
I thought this would also provide greater
monitoring for the performers themselves.
The echo reduced by about 50 %. I guess
this is because I now needed less volume
to cover the audience area. At this
point all chairs were assembled but
only one person (my friend) was in the
audience.

The results during concert were:

1. perfect sound for both vocalist and violin.
2. some trouble with increasing the mridangam
(drum) mics gain (the mic closest to the audience).
mild feedback occurred twice in 3 hours, still a
very positive experience.
3. I personally thought the volume for people
sitting in the first few rows was too loud
(about 30 minutes into the performance,
I walked around the perimeter of the hall to
check volume.) However, the audience and
the performers did not complain (which was
never the case in the past).
4. The echo problem became practically
unnoticeable during the concert. I guess one
can attribute this to audience members now
acting as sound absorbers.

Conclusions:
My main concern was that the violinist played
very softly and I had his mic gain almost at
85%. In the traditional PA, I would have been
fighting squealing feedback constantly. In
this performance I only noticed a mild feedback
at one point, and I am not even sure if it was
feedback or an error in his playing. I will have
to work on how to deal with the drummers
right side mic for future concerts.
SUGGESTIONS WELCOME.

Due to heavy rain, only about 60% of the
room was occupied, with the majority of
audience in the first 50 feet from the stage.

At the end of the concert, the vocalist announced
how great the sound was in his final remarks, and
the violinist came up to me and shook hands during
the post concert activities.

Funny thing was that several audience members
were walking around trying to figure out where
the sound was coming from, I had kept the towers
just touching the edge of the curtain, so no one
could even see it. They couldn’t figure out why
it seemed that no sound was coming out of the
traditional PA, but they weren’t even sure it wasn’t !

Once again, a resounding success in my book,
Thank you Bose and all the folks in this forum !!!

- full thread here