Whenever I calibrate our 600 with the rest of the system using the SPL meter it seems a little too weak for me so I run the sub about 3-5 db's hotter than the other speakers, and then sometimes will bump it up or down a little depending on the material being played.

Even after exacting calibration with the SPL meter you may still want to tweak the system for your ears, after all that's what really matters.

Rick
Our Room

smile