It looks like the mixing bowl rear enclosure is going to make things painful for assembly. Back to the drawing board for that part.
It looks extremely good in the stone pot, can you not damp the stone pot and use it as the enclosure ?
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I will be doing so but that's where the second part of the plan comes in. There will be an active cardioid driver in there as well so it has to be sealed off separately.
Not such a big challenge but I'm trying to assemble the whole thing without visible fastners, makes things more challenging.
Not such a big challenge but I'm trying to assemble the whole thing without visible fastners, makes things more challenging.
Hats off to you! I'm a bit obsessed with alternative construction methods and this is one of the coolest things I've seen. Awesome work! Did you first prototype the MEH arrangement to verify good port placement/ size/ etc? Or maybe that is all down to a science now. My MEH experience is nil.
Thanks cspieker, I simmed a heck of a lot and in the end it seems that the closer I could get the mid ports to the throat the better.
Once the size of the port was established there is an interesting side effect, it didn't really matter what driver I picked it gave a very similar top end response with only the bottom end roll-off changing.
Once the size of the port was established there is an interesting side effect, it didn't really matter what driver I picked it gave a very similar top end response with only the bottom end roll-off changing.
One step forward, two steps back...
So I had to make some modifications to the previous plan.
The mixing bowl was just too tall to allow the cardioid part of the speaker to proceed so a bit of choppy choppy was in order.
Now a second 12" waveguide is glued to the bowl to provide the clearance I need.
Clear as mud I know but it will make sense soon, I think.
So I had to make some modifications to the previous plan.
The mixing bowl was just too tall to allow the cardioid part of the speaker to proceed so a bit of choppy choppy was in order.
Now a second 12" waveguide is glued to the bowl to provide the clearance I need.
Clear as mud I know but it will make sense soon, I think.
Time to mark out and cut the cardioid vents in the enclosures.
Final rough assembly to make sure it all fits. Tolerances are tight with the clearance between the rear cardioid woofer and the mid enclosure being only a few mm. I will need to refine the clearances a little and then damp the rest of the enclosure with more tile glue and sika.
