Ok, Well I broke my jasper jig and was sick of making one out of wood every time I needed to cut a circle. So here is my cheap solution. The best of all, if you can measure properly this thing cuts great and is adjustable to any length you need.
To find sealed resonance
resolve Vas/28.32 =
result of that divided by Vb( box volume)
result of that +1
square root that result
result of that multiplied by FS
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