On Tue, 16 Dec 2008 01:49:02 -0800 (PST), Mario
wrote:

I think I need what is called 8 way speaker switch

I need to connect a stereo source to 8 pairs of speakers selectable

So you can't use a hi-fi amplifier and 8 ohm speakers - the load will
vary too much between having one pair of speakers and eight. You'll
need a 70v line system. Read about them he
http://www.epanorama.net/documents/audio/70volt.html

The place that sells you a 70v output amplifier and the speakers will
also have switching boxes.