That's a great question Tommy since I too would like to add a front center sub. The answer that you recieve will also help me to make my decision solid toward another sub.I now have my 18" sub at the rear (due to room constraints) and I am looking to go to 2 15" subs front center and rear I would imagine that these subs being stereo would have an advantage over mono.Sombody help us out.

861v8, 808v6, 800v3 w/LPSU, HD621, MD600, DSP8000.2USE, DSP7200.2HCUSE, DSP7000 (rear)w/2 Revivers, DSP3300 (sides elevated), Seaton Submersive HP Subwoofer, Sim2 3000e, Oppo BDP-103, Stewart Film Screen JK Gray Hawk Grand Cinema R/S 115"Diag w/masking.