YeH. 9.2=5.1.4. Just add the first and last. I use a Marantz 6012, but I also added an external amp for 7.x.4. It has processing for 11 speakers but only 9 internal amps. So you have to pay attention to that when comparing specs. For example, as long as the AVR includes Atmos(or dtsx) then you can usually know what it can do. 7.1 can do a regular 7.1, or 5.1.2, or 9.1 can do 5.1.4, or 7.1.2 etc. The .1 in the center is just the LFE channel. Many AVR’s can adjust two subs independently, but some have a simple internal splitter and are still labeled as .2 subs. Have to pay attention there too, but the 6014 you’re interested in will set the levels and distances for two separate subs. It will EQ them as one which is common practice.