Wayne, its interesting that you mention using a bandpass box design. I wonder how 2 LAB 12s in clamshell would do in a Decware 12 inch Deathbox. I've actually had the HL 10C on my mind lately in either a 10 inch deathbox I have in my attic or in a 1ft3 vented box tuned to 30hz for a car application. But what you say really makes me wonder about the LAB 12 Deathbox in a home setting. -Matt