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Old 19th June 2013, 02:24 PM   #1
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Location: Taos, NM
Question Baffled about baffle

I am gearing up to build a pair of Zaph SR 71 speakers. I have ordered the drivers and accessory parts kits from Madisound, along with the upgraded crossovers. I have a sheet of 3/4" Baltic birch plywood for the construction of the boxes. Last night while preparing a cut sheet, I noticed that the dimensions call for the baffle to be 1" thick. My plan is to use the 3/4 Baltic birch for the entire box including the baffle.
I have three questions:
1) Is 3/4" Baltic birch too thin for the baffle?
2) Will the slightly larger depth make any difference?
3)I have some 5/4 walnut lumber on hand (1" thick) - is this suitable for the baffle?

This is my first set of boxes to be built from scratch. I put together a pair of BK 12's from a kit last year. Thanks for any and all answers and thoughts.
Ralph
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Old 19th June 2013, 05:14 PM   #2
jReave is offline jReave  Canada
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1) No, you probably wouldn't notice any difference but 1" is a little bit better. You could glue on an extra 1/4" layer of wood.

2) You gain .427L extra in volume. Intended volume before driver, port, xo, etc. subtraction is 14.95L. So that's about an additional .029%. In other words, no difference.

3) That walnut would probably look beautiful. Note however that some people have had problems with natural wood splitting over time and humidity changes while others haven't. Fastening the baffle to the speaker with a method other than glue will probably help to mitigate that problem.
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