Speakerbuilding:

A few pictures and pdfs of a pair of speakers I am building based on a design by Jon Marsh, described here at htguide.com. The crossover design is based on the March 20 version. This speaker is an MTM design using 2 Dayton RS-180 7" mid-woofers and a Seas 27TBFC/G tweeter.

Here is my "separated" labeling of it, and some sketches to try and understand it:

and here are pictures of the first (one!) crossover (split into three boards)

Here is the Bill of Materials:

My box is a standing/tower design, of 1.7 cu/ft (50 cu/l), with a bottom firing 3" dia. port, tuned to 34-35 hz (6-7" long port). Here is the box design, 2 speakers come out of 1 sheet of MDF (if you are very careful):

and a few (not great photography) in progress pictures:

the front baffel has a 1" radius roundover, the back 3/4 inch.

and the finished speakers:

They are finished with a coat of sanding sealer, a coat of ben moore alkyd primer, and then a color coat of ben moore satin impervo alkyd enamel, with a smooth roller

Everybody that has heard them thinks they sound great :)