I want to commend Soniphase for providing a wonderful enclosure for the K 33s. It's called the SL-6, and for buying their tractrix horns (for the mid/high range driver) I was able to purchase plans for the enclosure for 200.00 and build them. Kevin Bartlett of Soniphase was most helpful with building tips and the results are brilliant, as they say across the pond. I have previously built a Jamboree and K-horn but the K33s shine far better in the SL-6 enclosures. For a real treat, I highly recommend providing a home for your K33s either by buying the enclosure or the plans for building them. I'm glad I made the investment and had the time to build them. I am also told they work well with the EVX 155, but these are hard to find.