sancho wrote:

In my band we have 2 ways speakers, we play andean music, panflutes, classic
guitar, drum, just accoustic sound.
I wonder if we buy 3 ways speaker is going to make any difference.
The way that I understand is the we are not getting the mid freq it all, the
speakers we use has the horn and the huge speaker about 18" diameter.
Few years ago we used to perform with my 15" home stereo speaker(ja ja) but
the sound was great, we don't play very loud, we play in private parties and
festivals. The speaker that we use now(2 ways) are JBL, I know that are very
good speakers but maybe with should get other speakers.
Anybody has any advice?

The way to get 'better' sound for a band's system
is usually to avoid having a crossover point in the
important voice midrange. But since efficiency is
also very important due to volume level requirements
this means a 3 way system. 10" or 12" speakers are
almost always better sounding than a horn or 15-18"
cones especially off axis.
300-3000cps is a good range to keep intact but this
can be fiddled with a bit for a large (meaning band)
system.
This allows a smaller tweeter with better high end
extention and larger cones for better lows.

In your case I think a 3 way setup will be a noticable
improvement. It does not need to be an active tri-amp
arrangment either... passive between mid and high
with a separate low end amp works well.

good luck
rd