What are the specs of / or where can I buy a suitable replacement power supply for the firefly 302 plus firewire audio interface? I bought one second hand and the power adapter looks like it might be wrong. I found one That I had but was wondering what the amp spec was, I don't want to mess up the firefly with it. I know I can find a pcmcia 6 pin firewire card for my laptop, but I'd rather not, I'm happy with the 4 pin. Please help!