Here's the original 412a response ( from 1955 ).
oOOps ( the software won't let me link the pic in > big-bro keeps removing it ).
One ( can't see now ) that it was designed as a full-ranger ( the dotted line represents the response when used in a 606 cabinet and placed in a corner ) .
There's also a Japanese response graph to see ( dug up by Katalyst over at AK, and posted within this thread about using a 412 in his M15 project )
Katalysts phone-app measurements also show the 412's true full-range capabilities.
FWIW, I'd be building all of them in separate boxes to be used as a possible MTM stack ( or quasi MTM in a 2.5 sort of configuration ).
- all placed close to room corners to enhance the low-end .
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