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samsc
29-03-2005, 06:36 PM
In shows, audio video and lighting power often come from different supplies or even different phases.
You have to be very careful when doing show control - you get hum when you connect things together.

Audio isolation transformers are quite useful.

ARTcessories makes an isolation transformer ( the ART DTI ):

http://www.8thstreet.com/product.asp?ProductCode=30120&Category=Audio_Processors

The manufacturers website is :
http://www.artproaudio.com/