I've been lusting after a nice tube amp for a while, and finally settled on a Sonic Frontiers Power 2. I assumed that it was common ground, since it's Anthem cousin The Amp 1 is. Unfortunately, I didn't ask the question until after I paid the deposit. Turns out that the SFP2 is not common ground, according to none other than Chris Johnson himself.
I currently have a pair of SDA SRS2s from 1986, which are blade-blade and thus not able to use the AI-1 cable. So, here are my questions:
1) can I "strap" the negative terminals (and does that mean that I still run speaker wire from the negative terminals, but also jumper them)?
2) is there a way to modify the cross-overs for AI-1?
3) should I bail on the SFP2 (at the risk of losing my modest deposit)?
4) should I sell the Polks and move on (don't want to do this one)?