4641 Views 1 Reply Latest reply: Dec 13, 2009 2:19 PM by Kenichi Watanabe
I'm not familiar with those speakers. The speakers need to be self-powered. They connect to the audio-output port ("headphones" mini-jack).
Standard external powered speakers just use this port for analog output. You typically get two speakers and sometimes a subwoofer.
The output port can also be used as an optical digital output port, using an Toslink adapter.
[Toslink To Optical Mini Adapter|http://www.amazon.com/Toslink-To-Optical-Mini-Adapter/dp/B0002MQGRM/ref =sr11?ie=UTF8&s=electronics&qid=1260742215&sr=8-1]
Optical digital output will allow 5.1 surround sound if the sound system has optical digital input and those additional speakers. I don't think "8.1" is possible, unless the speaker system (not the Mac) is doing special processing add those additional surround sound speakers.