If anyone has time, I'd love to know the settings ya'll use on your amps. I'm using the 900 with a Goliath Sr, and the 400 with a Triad. (All pre Fender stuff)
I always boosted the mids around 800 and 500 when I had an SM-500. Used a 900 a few times and did the same. Also I would turn off the tweeters when using the Goliath 410's.
Here's a short lived thread I had posted settings and samples in. http://www.talkbass.com/forum/f15/swr-sm-400-settings-thread-947667/