What do you instead for program material? I'm looking into taking advantage of the Shiva sale, which puts the driver only $15-20 more than the Titanic. I think it has greater xmax, which may be better for HT. If you're sealed, you can go small. I'm looking at building a music-only ported sonosub, which will only add ~$10 to the build cost for the port (also on sale with DIY cable). If you're going for HT use and go ported, it needs a larger tube than I'm getting (4ft^3 gross, 14"x48"), but hey-the price is right $9 and I only need it for music. I'd like to see your project, and as Mike P would say- take plenty of pics!:bigsmile: