MDF is used because it is cheap, is easy to bend and machine, requires minimal CAPEX and no specialized knowledge to manipulate.
If you want to compete in the high volume game, MDF or other wood material are inexpensive and the only way to compete.
For instance, in an MDF cabinet, I can produce a Stand mount speaker that will be pretty good for $2k if I sell consumer direct as a small manufacturer. It cost me more to paint a composite or carbon fiber cabinet than it costs me to produce a whole speaker in MDF.
Material costs on advanced materials (fiberglass, carbon fiber) are very high or machine costs or mold costs for aluminum, casts for phenolic resin, etc... are all extremely expensive and then the cost to paint is dramatically higher.
If you want to compete in the high volume game, MDF or other wood material are inexpensive and the only way to compete.
For instance, in an MDF cabinet, I can produce a Stand mount speaker that will be pretty good for $2k if I sell consumer direct as a small manufacturer. It cost me more to paint a composite or carbon fiber cabinet than it costs me to produce a whole speaker in MDF.
Material costs on advanced materials (fiberglass, carbon fiber) are very high or machine costs or mold costs for aluminum, casts for phenolic resin, etc... are all extremely expensive and then the cost to paint is dramatically higher.