Any improvement in imaging (which there may have been, though subtle) was overshadowed by the severe loss of bass. This was much more extreme than the reduction in woofer size alone can account for, and was probably caused by the disconnected rear mid/bass driver acting as an out-of-phase passive radiator. The result sounded exactly like a decent but small tower with response to around 50-60hz (eg. the Polk M20.)
I have re-connected the rear drivers, and appreciate the awesome sound more now for having tried the experiment
I thought I already responded to this, but I don't see the post...
I think you said you're using BP8s. I think those guys share a chamber between the front and rear sections, in which case you are right -- you now have a passive radiator, and I'm not sure what that's going to do for you! You're also moving way less air in the chamber and through the ports to generate bass, which is the effect you witnessed.
Now, with the BP2002TL, I'm not sure if the front and rear arrays share a chamber or not. I think the sub may be responsible for all bass and resides in its own chamber. If so, I may be able to remove the rears and still maintain bass. We'll see if I get there... So much to do!
Thanks for the experiment, though, PULLIAMM -- it's an interesting result. I really like the DTs, but, like we've said, they're suboptimal for 2-ch (which, FWIW, seems to be less and less of a big deal to me -- I just like to tweak for free). I would like to see DTs offer a robust on/off control for the rears, as well as a tweeter attenuation (and perhaps passive EQ?). I find them just a bit bright or forward sometimes. But beautiful speakers -- both in looks and sound! Just so much there to play with.
Have a great day all!!!