"So this means, I leave the Gain control on my SVS Sub to midway and adjust the db level on my receiver till it achieve 75 or 85 db? right?"


Seanandredj, here is how I set my SVS 25/31 pci:

The receiver volume is set to 00.
The receiver sub-level was set to -6.
Started with the sub gain mid-point (12 O’clock)

Run the test tones (use the receivers or one of the set up disks). Adjust the sub-gain to the desired reading. Mine ended up just shy of the 2 o'clock position at 85 db. I used the Sound and Vision set up disk.

This works for my sub. It's never distorted or bottomed out.
It will literaly shake the house when watching a movie such as LOTR and for music sometimes you don't know it's playing unless you turn it off.

Hope this helps.