thanks for all the answer! Sennheiser sent me a replacement cable and it works! They did not charge me for this and that's a sign of a good company that stand behind their products. As far as I know you may need to hold the power button for about a second to turn it on. I wish I could be of...

Thanks Joe. I did contact the seller and we're working on something right now. They will try to contact Sennheiser to send me the cable. Hopefully Sennheiser won't give them too much trouble. How do you like your dsp pro? Dave

I bought one of these from ebay and can't figure out how to power it on. The plug that looks like a svideo plug has 8 pins. Is this correct? I'm asking because the dsp unit has 6 holes for pins and one big hole. I don't see how these two will fit together? Any help would be appreciated to get...