Prototyped a wall mockup of the connector box. Rather do it now than find out 34 boxes later that there was a glitch in the plan. There is actually a lot of stuff which could be screw'ed up ... so I need to verify that

- at least 6 inches of wire fits in the box (to install the connectors easily)
- that the wire is strain relieved (don't what to break any acoustical seals).
- it protrudes no more then 0.25" so it would fit behind an on-wall speaker
- everything fits with-in the 1.25" space of a double layer of 5/8 wall board.
- it's acoustically sealed from the wall cavity
- the connector plate sits flush when with connectors installed & using 10 AWG wire
- connector plate needs to sit tight against the wall board

Note pic below is without the acoustic sealant
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Took 2 prototypes to get it right.
Next step ... Mass production (at least for me) ...
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Each run of 7 boxes takes 21.5 hours. The pict above is the third run. The upside is that I only need to keep an eye on it for the first 30 minutes as once the first layer is down it's usually good to go.

While that's going I'm in the process of cutting into the MLV and moving most the in-wall speaker wires ... I stupidly used the measurements from an older plan which had the MLP at 12.5' from the screen. It's supposed to be 11.5 frown

Luckily MLV is very easy to patch with a bit of vinyl cement.