Well, I went and bought a Sony home theater sub. A big one about 100 watts. Got it at a pawn shop for $35 US.
I use powered monitors. So for a quick and dirty solution I took a "Y" off one of the control room outs on my board and ran the sub off that.
I use Alesis M1 powered monitors that have almost no low end anyway, but I still intend to get a stereo crossover to do this right... If I have bass coming form the sub I want to kill those frequencies from the nearfields to avoid any possible masking... (Correct me if I am on the wrong track with this)
Anyway. I am happy to report that the even this Mickey Mouse low tech setup has made a big improvement in my small control room that I have been trying to deal with low end issues. (Yes, lots of rockwool)
Also' I have been in the middle of trying to nail down a mix on a record I'm working on with "drop C" tuning, where the bass gtr is almost off the bottom of the page spectrum wise. The sub made a big difference in that I can actually hear the bass fundamentals. I had been pushing too much bass in general, and the sub allowed me to tighten up the bottom end nicely....
So there you have it.... A Sub with almost no budget... a story worth relating on this "Bugjet" forum... (Love this forum Terry.. great idea!)