"Particle bd' or MDF (Off Topic)

by GC, Friday, January 20, 2006, 06:29 (6669 days ago) @ Bert

Yep, that is the stuff but then without the plastic laminate. The dense
outside and the relative loose inside of these panels absorb energy which
is good. The speed of sound in these panels is also different keeping
"noise" inside the enclosure and less audible for the "outside" world.
These panels have a low Q.

I'm also a great fan of the PB. The knock test shows a nice pattern of dampening qualities and what is left sounds very musical.
The choise of materials for all parts involved in a speaker system is critical. That goes from the cabinet to both the diaphragmes, voice coil forms, voice coil conductors, spiders, surrounds etc. etc.
All swinging parts contributes to the overall sound in a positive or negative way.

But not only PB is excellent for cabinets. Also plywood of different wood sorts. Birch as one of my favourits. A compromise between the hardwood sandwich board and the soft wood sandwich board.
Also newer materials as very light weighted composit boards, such as the materials choosen for the ORIS SWING, exels extremely good musicalities. It keeps unwanted sound trapped and what is left sings like Marial Callas.:ok:

MDF, high undampened Q, is my least favourite material in terms of sound,
you can always hear that an enclosure is built from that material giving
an artificial sound. Perfect for finishing, cutting and painting though
which is probably the reason why most loudspeaker manufacturers use it.
It's cheap and less labour intensive giving it's wrongly accepted
popularity in the common world.

No wonder this material never were the choise of any instrument builders.

BR
GC

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