*Update*
Ok, I was kinda happy with my stealthbox and jl amp. But I wasn't convinced it was all worth it.
I changed my high-pass settings to about 90 and the low-pass settings to about 95. That's better.
Then I remembered I hadn't setup my lc7i bass control and accubass settings. In fact, they were turned all the way down!
So I setup the lc7i bass settings.
I also added the remote control knob for the jl amp ( a must have IMHO ).
Then I re-configured the output signal on the jl sub amp to 31.6 volts.
Bingo! Bass is awesome! My system sounds gorgeous!
I love the remote knob so I can adjust the sub output on the fly, it's great!
The Stealthbox and jx500/1d rocks!