Donnie, if you're looking for high volume and low weight, this might be interesting for you.
We use these in the band as PA speakers,
(we use the ZX-4 model) and so far nothing beats these on high volume.
We use a dynacord powermate as mixer/amp
(2 X 700 watt)
Fred
http://www.electrovoice.com/productfamilies/59.html
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Keyboards/Sound Units: Kurzweil 2600S, Roland VR-760, Acces Virus C, Roland G-800, Akai AX60, Minimoog, Machine Drum, Roland R8-M, mediastation x-76