I just got a GS 115 and tried that with one GS 112 instead of the 2- GS 112s I was running. I was happily surprised at the improvement as far as getting more bottom end. That was what I was hoping for and the sound sure got bigger. It raises the head up a lot higher which is nice too. The GS 115 has been discontinued but I was lucky to get a new one from a music store in Chicago. Thanks guys for always being there with advice.