HECO Kraft Paper Cones
The material they came up with for the midrange and woofer drivers is equally unique. In today’s world, we see all kinds of exotic materials being used for midrange and bass drivers. HECO went back to the Golden Age of stereo and rounded up some classic drivers from Goodmans, Pioneer, Jensen, Klagfilm and more. These drivers were sold to many other speaker manufacturers and wound up in many of the classic speakers of the day that were loved by music lovers. The one common trait they shared was they were all made from super high quality paper for the cone material.
HECO measured these drivers and found the damping and magnetic field force was more symmetrical than many current day exotic drivers. This led them to wonder how you could take this classic design and apply modern tech to it.
The whole process they came up with is pretty neat. You may know that paper is made from wood pulp. HECO sources their wood pulp from renewable North European and Canadian pine trees. They have come up with a specification so the resulting material will be lightweight yet super strong. HECO takes German made wool fibers that are about ¼” to ½” long and adds these to the pulp mixture to improve the damping characteristics of the cone.
After the wool fibers are added, water and specially developed chemical substances are added and the whole blend gets run through an old school machine they call “The Dutchman” which twists the fibers perfectly to produce a light-weight, rigid and well damped paper cone.
This whole process makes their paper cones cost over 10 times more than a conventional paper cone, but the result is a driver material that performs incredibly well! A great cone does you no good if the rest of the structure is not up to snuff. This is where HECO applies science to create midrange and bass drivers that both measure and perform as well if not better than anything out there.