Ok, so keep regular ac/wall adaptor. Then I can just pick up another ac/wall wart adaptor to hack, right? It'll obviously have to be the same size for the input in to the hosa, but does the wall wart adaptor I buy to hack need to be the same voltage and such as the one I currently have?
Thanks
Don't buy another walwart - you don't need to hack anything.
If you want small size, find the plug I posted the picture of, a C tip adaptaplug and a couple of rechargable 9V batteries. If you want power for festivals, buy something like the 9V 5400 aH Walmart DVD battery on Ebay (search for "memorex dvd battery"), a female-female adaptaplug cable, a C tip and an M tip. I think I have the part numbers right, but bring battery and hosa into radioshack to make sure things connect ok.
The 9V battery solution would be about $8 for the cable/tip plus whatever price batteries & charger go for.
The 9V DVD battery would be about $5 for the battery, $15 for the cable and tips.
I would have copy/pasted some of this stuff, but my copy/paste abilities now seem to be malfunctioning again.