NWCgrad Messages: 143 Registered: March 2010 Location: Frederick, United States ...
Master
I will be gluing the front baffle on this weekend. Since I have doubled the thickness of the baffle from 0.75" to 1.5" I made the port exactly 0.75" shorter - thus the overall length from the front of the baffle to the end of the port is 10" (as in the original plan).
Is this correct or are there other factors at play that I failed to take into account?
Wayne Parham Messages: 18791 Registered: January 2001
Illuminati (33rd Degree)
That's right. You want the duct to be 10" long from entrance to exit. It's the airpath length we're concerned with, and the fact that the baffle makes up part of it is fine, as long as the total path length is right.
NWCgrad Messages: 143 Registered: March 2010 Location: Frederick, United States ...
Master
Was able to get the inner front baffle glued/screwed before I had to return to Newport for the week (left nice warm Maryland for cold, drizzly Rhode Island ).
- I use a paint brush to apply an even coating of Titebond III glue (2x on the MDF edges as it soaks in during the time required to apply all the glue).
The final picture shows my 18-year old Paradigm 9se MkIII speakers these will replace, my 24" sealed sub (Exodus Audio, Maelstrom-X 18" driver), a bit of my Paradigm PDR 12 sub, and my projection screen. Only the two 4 Pi speakers and the PDR 12 sub will be making the move to Cambodia, the remainder will be going into long-term storage.
NWCgrad Messages: 143 Registered: March 2010 Location: Frederick, United States ...
Master
Thanks...they are coming along and I cannot wait to get my shipment so I can give them a listen!
Next weekend I will add the bracing. I am thinking of using one .75" x 2.5" [a] oak piece side to side w/ three 0.75" x 1.5" [b] oak pieces as shown:
As I already have the wood as leftover from a different project I figured three front-to-back is better than one, it does add an extra 0.025 ft^3 of volume but I think this is probably negligible.
Could this bracing modification do more harm than good?
Attachment:4 Pi bracing.png (Size: 4.76KB, Downloaded 9853 times)
Wayne Parham Messages: 18791 Registered: January 2001
Illuminati (33rd Degree)
I think that's fine. Don't know if it's better or worse than a cross-brace but I do know it makes a better "rest" for the R11 that should be placed there.
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