I have a self-powered 8 inch bazooka tube thumping away under my port dash, and I noticed that it gets much louder and sounds much better when I lift the observer's seat up. Does anyone have experience cutting a vent hole, say through the walkway area or something, to let the sound out in a situation like this? I'm thinking I could use a hole saw and then cover it up with a speaker grill. I'm just wondering how big a hole I'd need to make it worthwhile.
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