You could link up two 3.5mm to dual 3.5mm headphone adapters into the port and you'd have sound in all speakers. It won't be surround but atleast you'll have sound from them.
http://www.rackxpress.com/product_in...roducts_id=416 here's what I mean.
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2006 Suzuki GSXR-600 | Blue/White | SET Valve delete, -1 + 2 gearing.
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