It would be the same sub, all the speakers are def tech minus the sub which is klipsch. I don't think the sub matters as much as the rest as far as matching. That being said I will not mix brands or sizes of subs due to wanting the best sound I can afford with easiest setup. I believe that having matched fronts, center, surrounds and height if you have them are the most important thing as well as the center being highest of quality. Let's face it most of the time you can't hear the dialog because the center channel is skimped on by so many people, the center channel is the most important piece of the home theater in my opinion.