Greatest output for space

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Heres the data. 2.84V SPL taken at a lower level and adjusted to avoid equipment overload. Used ECM8000 mic with generic .cal file and radio shack SPL meter again with generic cal. Just in back yard as shown in earlier pic.
Response curve looks nice, what post # is shown in earlier pic?
How close to walls or fences?
Two years is a long update, but looks like a good cabinet.
 
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Ah just the pic of the sub on the floor. Pretty rough cab but I have limited tools and it was hacked together from the previous failed iteration, quite strong and well braced and air tight though.

boundries are: 2.5m(wall 1 story), 3.5m (wall 2 story), 2.5m (fence) and 18m (fence) for the measurement which was taken at 1m with the sub positioned as shown. So response should be I think 2pi with some reflections/gain from the boundaries.
 
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