Angelo (Cam8neel):A 15" woofer will obviously produce a MORE bass, but for ballads and acoustic type (pop, jazz, big band, and country) stuff, the SxA100's (with 12" woofers) provide a very smooth freq response with natural sounding full bass. Angelo, it's also IMPORTANT to know what size of room and the number of people you plan to play for. I chose the EV SxA100s because I think they provide the best sound quality relative to its size/weight (easy portability).