You may use any balanced interconnect without modification! You might want to correct the phase inversion by switching your amp speaker wires, so that (+) from your amp is connected to the (-) speaker terminal. This will return the signal at the speakers to the correct absolute phase. BE CAREFUL IF YOU ARE BI-WIRING SPEAKERS! You don't want to short out the amp, if you forget to reverse one of the sets of terminals at the speaker end...that is why I recommend making the switch at the amp terminals.
So, what are you using, their digital eq DG-28?
So, what are you using, their digital eq DG-28?