my first and only comp was with isobaric 250ls ported and superman 5.25s and I took 1st rookie.
Best sounding enclosure ever. I only used two amps the zapco pre-studio z100s so I was in the 200 watt class. Still such a great system in a vw corrado. passive, no dsp, low power but just great.
I still put the 250ls up there. Just so butter smooth and play low and do great in my home theater in 1.7 @ 26hz wit 250 watts.
if youre building a HT sub, these work VERY well and theres been an audiomobile evo, newer version oz matrix, and dayton HF in the same enclosure and the oz 250l is my favorite by a considerable margin. I just like the smoothness
If anyone has a set of the cotton blend tweets Im always looking so pm me.