Do you adjust your subwoofer

http://www.graniteaudio.com/phono/page4.html

model- cd102 

Movie sound tracks have a 4db increase for the LFE channel. So if you are not running a home theater processor adding 4db would be about right.  

Aerial sw12, I bump in up for my some of my boom boom visitors, other than that not much.

About 9 months ago, I added in an SVS Micro3000 subwoofer to my system. I have Charney Audio MaestroX speakers which are single-driver speakers and opted for the expensive AER-BD3 drivers. The MaestroX’s with those drivers are very revealing and cover the frequency range from ~ 60hz through 20Khz very well. My in-room measurements and confirmed by listening showed me that I really needed some good, taut reinforcement of those frequencies below 70hz. I really missed the lower bass frequencies as the MaestroX’s roll-off rather quickly with their horn-loaded bass. After some research, I decided to get the SVS sub. I found placing it directly in front of my amp-rack for my listening was the best physical position for it. The SVS sub has a great software program that on the fly, you can change volume, frequency roll-off, and speed of the roll-off among other parameters. After playing with it for about a month or so, I settled on the best parameters for my normal listening and it has added seamlessly to the bass response. I just let my set parameters stay no matter what music I’m listening to. The only time I change the volume parameter on the sub is when I switch my stereo amplifier with a different one. When going from an amp that has different power levels and different input volume to max output for the main speakers, that can obviously change how the sub sounds with relation to the main speakers output. So when I switch amplifiers, I just boost or attenuate the sub output level to match my favorite listening level. That’s really the only time that I change the sub parameters, once I got it dialed-in and balanced with the main speakers.

@liquidsound 

You are on the right path. Might I suggest a second subwoofer and a complete two way crossover so you can put a high pass filter on your main speakers. This will lower distortion and increase headroom dramatically. This is just, if not more important than the added bass a subs brings to the table. This is especially true with full range drivers. The second subwoofer will smooth the bass response throughout the room a little better. Subs perform best up against the wall and in corners, but in order to time align them with the main speakers you need digital bass management.