That’s exactly what it is Daniel. I also have the BA210 version which is an identical size cab, but 2x10 speakers and higher power output AND an external speaker output jack on the rear. I was told that the 210 version runs at 280 W but when you connect the external cabinet at eight ohms, it puts out 450 W. Also, somebody told me you can connect two amplifiers such as those two together by connecting the FX send with a cable to the FX return on the other amp, which is considered the slave amp. Have you ever heard of doing such a thing?