I have a MX-1, fed by a NAD 1600 preamp. It's powering a pair of SDA SRS speakers, and the setup sounds spectacular. HOWEVER, it would be cool to have the ability to trigger the power amp with the preamp and have a matching Yamaha pair. Can the MX-1 take any 12v trigger or is the CX-1 CX-2 trigger signal what it needs? Is there a big difference between the CX-1 and CX-2 such that I should look for the CX-1? I've read they reduced stereo separation for the CX-2, and the CX-1 would give me an optical input for my xbox one. If it's not really an upgrade I won't bother, namely because I'd be loosing the excellent FM tuner in the NAD 1600. (Replacing it with a Yamaha TX-480 or using the NAD as a tuner until I feel like shelling out for better) I posted in dollars and sense about the value of a CX-2, forgive me if that's a bad choice. I wanted to ask about the functionality here and it felt best to ask yamaha gurus here.