If it's a pressed hemp pulp cone I wouldn't expect much difference from a regular pressed pulp cone.. if it's a composite cone using hemp cloth, it would be somewhat akin to using kevlar which is a strong, durable fabric...

On the otherhand for a speaker cone, carbon fiber or fiberglass is going to give a harder cone that is less prone to breakup for a given weight....



Hemp accoustics has some interesting products...

The TSUZUREKO 25 looks insain !

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SIC Audio