I was feeling a little Sunn-y about having a 300 Pro, an 18" JBL, and a 3 wheeled cab that needed tuned. With the current tuning (~55-60 Hz) I think I could hear and see it unload when I don't high pass my signal. I definitely get port chuff from the holes. It's a moderate sized box and will give me -6 dB at 45 Hz and -10 dB at 30 Hz with a 40 Hz box tuning. Rolloff is smooth and if I tune it any lower I push my -6 dB point up to 60 Hz with no significant gains.
-Add two 3" flared ports
-Install speaker grill clamps
-Install Eminence Alpha 6CBMRA on the face
-Two inputs: LF (mono jack), Full range (stereo jack - second sleeve terminal grounds mid)
-Install proper casters
Here's the only pic I have. More build pics on the way.