Very nice work on the speakers and the documentation. Thanks for sharing. I like your use of the double baffle for the driver and will copy that idea for myself.

Considering the cost of drivers and simplicity of the speaker design, it's an amazing set of speaker, aren't they? I'm glad to hear you're getting deep bass from your set. My pair of Needles have a full and balanced sound, but nothing that can be described a deep-bass. But then again, I'm used to hearing a pair of JBL 2235, each in their own 5 ft^3 cabinets.

Gar.