genetica said:
About a 10 X 20 Room maybe to perform as a band.
Not too helpful, as you don't give the units? - feet?, yards?, metres?, chains?.
Ooo and to use within a jam room.
And it is full range speakers.
No problem on that, they are cheap basic PA speakers, but what are you wanting to put through them?, and what do you already have?.
Personally I would suggest something like the Behringer PHM880S, a light and compact 8 channel mixer with 400W + 400W power amplifier (it will provide 200W + 200W into your 8 ohm speakers).
It's what I use for my daugthers band, it does the job well, at relatively little cost, and all in one unit - including two digital effect channels, and capability for seperate FOH and monitors if required.
If you already have a mixing desk?, consider the Behringer power amplifiers, they are high powered, small, cheap, and well respected. Building your own is going to be considerably more expensive than buying one!.