Mounting Depth: 6 7/16 in
Magnet Height: 3 1/16 in
Magnet Diameter: ~ 6 in
Mounting Diameter: 10 3/4 in
Overall Diameter: 12 1/2 in
These measurements are my own that I took not from RD directly.
http://www.rdaudio.net/classic/classic.htm
-Features
500 watts RMS power
Dual four ohm
Long excursion motor structure
NBR surround
Poly/mica cone
Water proof
Extended cone and neck joints
Dual stacked 60oz magnets
Spider is bolted to the basket
Flat braided tinsel leads that are formed to the spider
Classic 12" Enclosure
1.0 ft3 sealed 1.5 ft3 sealed
2.0 ft3 with a 4" round or 12.5" slot port by 12" deep tuned at 35hz
2.5 ft3 with a 20 square inch port by 16.33" deep tuned at 35hz *a lot less port noise
2.0 ft3 with a 20 square inch port by 12" deep tuned at 44hz * high output