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Old 3rd June 2020
Lives for gear
voodoo4u's Avatar

Originally Posted by avare View Post
you are welcome. Please note that I referenced using the equations. By lower frequencies, as we are discussing, it maybe more economical to drill holes in plywood, etc. Even with the relatively low amount of holes it is still tedious. Layer the panels to reduce the number of operations of drilling.
Yes, that's my finding. A nice finished maple plywood is about a third of the cost of perforated metal and I can control the hole size and spacing whereas with metal, I'm limited to what I can find locally and it seems my choices are few.