I finally got to listen to Zilch's mini-4425's today, (mine are still in the construction phase), and have to admit - they sound pretty good! While bass is somewhat rolled off at the very low end, they're surprisingly smooth sounding speakers. Hopefully, mine will be together soon, and we can see how ported 115H-1's sound compared to Zilch's sealed 8 inchers... The high end is definitely really nice and smooth.
John