F,
Last time I checked, JBL could not find the drawings for the C44 enclosure.
There are approximately a 100 documents in the design/build package.
Expect to spend about $200-$300 for a set of copies.
Note that the design details of the elliptical midrange horns are not included.
If you get serious, can provide a spreadsheet for arriving at a suitable design.
Both JBL and TAD drivers will work well in this enclosure.
Here are some drawing sources:
Mike Calistrat
[email protected]
Audio Classics
Paragon-Plans
http://www.audioclassics.com/detail.php3?detail=PARAGON-PLANS&nav=cat
Regards,
WHG