Here is another one using R25 fluffy fiberglass stuffed into a frame, instead of 703.....

http://webpages.charter.net/jdgeisen/BassTraps/BassTrap1.htm

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85