recommended sub-woofers for tekton double impacts?

Rythmik. HSU is great too, but it doesn’t have as many room/system integration options (such as only a polarity switch instead of a knob).

Reach out to @sbayne

@chrono318  I paired my DI's with a pair of sealed Hsu's--see my systems page.
I'm very happy with the result.  Gives me that solid foundation to just below 20hz that I was after.  The controls are quite helpful with system integration and I find that Hsu was a very nice company to deal with.  the value is very high on this product--just like the DI's.  I bet the Rythmics are great as well. Their gloss finish would complement DI's with an upgraded automotive finish.

I’m using JL Fathom F113. Awesome sub! When I turn it off I honestly don’t notice too much difference for music but it does integrate well. I run the DIs full range and crossover the sub at 45hz.