As Andy points out, that depends on the output level of the DI out. Another potential problem is if the DI out is not 'post fader' -- the output level is constant and not affected by the output level control of the amp -- then you won't have any control over how loud the extension cab amp is going to be. The input gain of this powered cab won't 'follow' the level changes you make at your amp. You might be able to use the effects/tuner out instead, but without an input level control, this powered cab is very much intended to be part of an integrated system and to be controlled by a separate, external preamp. I'd contact EA and try to find out what the expected input level is. It might work, but it isn't a sure thing.