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Panzerholz: high-tech acoustical damping
The Firewalls panzerholz is much more than an aesthetically spellbinding enclosure; it was chosen primarily for its phenomenal acoustical damping properties.
Panzerholz is made of layers of beechwood, fused together under extreme amounts of heat and pressure (250 tons per square inch). This causes the original cellulose wood compounds to form new chemical bonds amongst neighboring layers. Thus, a new type of wood is born: panzerholz. It finds application in different high-tech fields. For one, Formula 1 race cars use Panzerholz for its excellent vibration damping properties (instead of aluminum or steel, which exhibit ringing). Also, some of the worlds top turntables and highest performance loudspeakers use panzerholz, and it also finds application in the high-tech field of neutron research with highly sensitive equipment. As we pointed out above, even in a power filter, microvibrations are undesirable. Since panzerholz exhibits among the very best vibration damping characteristics, it makes an excellent casing material for the Firewall.
Panzerholz (German for tankwood) is a high-tech natural wood product manufactured in Germany. It is known for its extremely high density (it sinks in water; approximately 87 lbs per cubit foot.), its high strength (similar to the strength of aluminum), and that only a relatively thin layer of it is required to stop a bullet in its tracks. This unique elasto-mechanical performance is related to its acoustical damping characteristics, which are among the very best of any material in existence. (See test on next page). These characteristics make it the best choice available for a high performance product such as the Firewall.
I myself am using panzerholz for a set of audio stands I'm having built (in the finishing stage now). Their primary objective is to eliminate loudspeaker and component-born vibration in the best way possible.
Panzerholz is being used only for the platforms (40mm thick). The biggest platform weighs just under 100lbs. Including the sand, the boxes and all the platforms weigh in at about 1200lbs, or 550Kgs (plus components). *The idea for the stands came from stands I encountered from the audio show in Munich, built and designed by the German acoustics and loudspeaker company, Kaiser.
If you want to check this panzerholz material out, here's the most interesting and informative information I've come across: Panzerholz vs. Aluminum: High End Audio.