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Way back in 1979 I was building a set of speakers that everyone seemed to like. They were made with Phillips Deforest drivers (no longer available) with a 12″ woofer, 2 x 4″ mids and 2 x 1″ tweets. I won’t say the sound is bragable by today’s standards but they did well enough.
But in that design I did something a little different. I used a multi-layer cabinet design consisting of a layer of 3/4″ MDF board sandwiched with 1/2″ plywood (on the outside) and isolated by a thin layer of silicone calking compound. The result was a virtually dead cabinet. No physical vibration at all.
More recently I came across this video … https://youtu.be/EEh01PX-q9I … that revisits the idea. (jump to 24:30 for the cabinet discussion)
Now I’m wondering if others have experimented with similar construction techniques and what the results were.
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This is a great topic. I can’t wait to hear what others have done. I have done this with Hardwood. If it is especially large or resonant, I will use an MDF backing to help deaden the sound. I know there are quite a few people who swear that if you do these multi layers that you should use green glue for it’s noise suppression traits.
I personally have not used green glue. I’ll be interested to see if anyone else has.
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The idea was to have a box in a box with a vibration damping layer between. The video I linked to explains it perfectly and probably in more detail than I could.
Sometimes I really miss those speakers… they could rattle the dishes in the kitchen any old time 🤨 but I lost them in a house fire in 1983… such is life.
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