After reading posts extolling the virtues of parametric equalization to improve subwoofer performance, I purchased the Stryke Bass Zone CD and used a Radio Shack analog meter to measure the spl from 20 hz to 160 hz. You can see the results below. The third column is the spl with the meter correction values added in.

Can one of you bass experts help me analyze this data? To my eye, it looks pretty bad. A huge spike at 40 hz and then it drops off fast below 36 hz. The sub is a Paradigm PS-1000 which I thought should be giving loud sound down into the mid 20's.

The sub is located on the front wall between the TV and the right front speaker. I tried moving it next the right wall, and the results were worse.
Do I have this setup wrong, or do these stats look normal for an un-equalized sub. Would the parametric equalizer help?

FREQ RAW SPL SPL (comp)
20 50 57.5
22 56 62.5
25 58 63.0
28 61 65.0
32 69 72.0
36 76 78.5
40 85 87.5
45 80 82.0
50 77 78.5
56 80 81.5
63 72 73.5
71 70 71.5
80 74 75.5
89 75 76.5
100 74 76.0
111 65 66.0
125 67 67.5
142.5 64 64.5
160 70 69.5