Or If you wanna take a SBD patch .
Usually you will need to run
RCA>Mini>Jb3
or
XLR>Mini >Jb3
I modded just One My Jb3's and left the other two alone , I run One optical out from the Jb3 , But I had some problems with one of my recordings One night due to the Rt angle connector for the Optical cable ( I Think ). SO I decided I would start running the "back up" Jb3 I got Coax>Converter box>optical>Jb3 ..
But once in awhile Im able to get SBD patch's from local bands and Little Feat and other National bands that are very taper friendly.. So its nice to be able to run a Jb3 for just the SBD and mix in the post if ya want.. And in order for my RCA> Mini plug or XLR>Mini adapter cable to work I had to mod the Jb3..
YMMV ....
I just originally thought this may be his (theRodge) problem ..
Nick