I happened to pick up one of these puppies for a good price and I want to know if this is ok to use with the SDA 1C's. I don't think that it is a common ground amp. It uses 5 separate power amp modules that I think use 5 separate grounds. From what I can gather, it is basically 5 mono blocks in a single chassis. I like this amp and got a killer deal on it, right now doing duty bi-amping my MB Quart Vera's with the 5th channel powering the center channel.
Though I would like to try and use it with the polk's but I think that I need to use the other style SDA interconnect to do this properly.