The BA115v2 does not have an output jack for an extension cab. The BA210v2 does. I have had a 210v2 for several years used with an additional external Ampeg cab and I am extremely pleased with it. 3 weeks ago, I purchased a 115v2 to use at our practice location in order to avoid lugging my 210 setup back and forth. And my thinking was also that with a similar combo I should be able to duplicate my amp settings and approximate the same sound at the practice venue. They may look virtually the same but the 210 (450W vs 150W for the 115) is really a whole level up and in my opinion, vastly superior to any of the other BA combo models. I am finding that in fact, quite apart from the speaker size difference, the amplifier component itself also has different tone characteristics. Not necessarily negative differences, just not the same. I vastly prefer the 210 but a big part of the reason is due to the fact that (in my opinion) the tone of the 210 with external cabinet is considerably better than the tone without the external cabinet. Again, this is not an option with the 115. When we play live, I am now starting to use the 115 as a 3rd cab/monitor by using the line out from the 210 patched to the line in of the 115. The 115 is a good practice amp but I would highly recommend anyone considering the 115 to save a little longer and fork out the extra $ for a 210. In my opinion, the advantage of 450W with ability to add the external cab is a really big deal. That's my two cents worth. Happy New Year!
