Sub box that is light?

[Accurate_db]

Back in the day there was super light mdf, but people blasted it with spl and was no good for subs. How about today? I heard in automotive unibody construction they use sandwiched foam for strength and rigidity while saving weight. Anyone sandwiched foam with fiberglass? Cause weight is important. Although heavier in car audio means more quality.

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[Jimi77 5,000+ posts]

Fiberglass and/or plywood is as light as you can get without breaking the bank.

 

[metalheadjoe 10+ year member]

Big subs have heavy cones. Heavy cones plus high power requires solid anchoring and solid enclosures. Most people don't anchor their boxes to the vehicle, which is why general advice is to use heavy wood (mdf) to counteract the movement of heavy cones.

Maybe that's where the myth of "box rise" started.