Thanks everyone for the help! I contacted soundstage and I talked to tech support but they were not much help since they don't make powered towers anymore so they needed a few days to look them up. So I went to visions and talked to a sales guy who owns a pair. he said don't use the LFE in. Now I have them set to small and crossover at 80Hz and they work great! The gain control now works on each tower so I have four eight inch subs in my mains. Next question is sub placement can I ask here or start a thread in the sub section?
Assuming your room doesn't have any open areas, using rew's room simulator can give you a starting place. Just winging it, I like to use music with familiar bass, rock seems to work best because a bloated bass guitar sounds wrong but a boomy electronic beat might sound good. Start with a corner on the front wall, this will theoretically result in a 6dB gain on the sub and should excite all room modes equally, increasing extension and minimizing nulls. If that doesn't sound good to you, try moving it 3ft to the left/right of the corner along the front wall. Just make sure to change the distance each time in the setup and disable room correction. If that still sounds bad anywhere on the front wall, try the rear wall, sometimes if the main listening position is closer to the back wall than the front wall, you'll get a doubling of standing waves causing huge one note booms. Lastly you could try the side wall, but this usually results in bloated upper bass in my experience since width dimensions are shorter.
Once you find a decent enough spot that is also practical, you can either run room correction or manually eq it yourself. No need to buy an expensive mic to measure low frequencies with rew, as long as you disable driver enhancements a laptop mic works for low end. You could also use the sub crawl method, where you put the sub in the chair you sit in and crawl around looking for the best sound, but I personally have never gotten this to work.
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