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OK, this metamaterials thing got me goin'. 
Was the dual-density particle board used by Altec for, e.g., the Model Fourteen loudspeaker cabinet, a metamaterial?
https://www.audiophilenirvana.com/audiophile-equipment-reviews/altec-lansing-model-14/
Maybe they got the technology from space aliens, eh?
source: http://www.lansingheritage.org/html/altec/specs/home-speakers/model-14.htm
OK, I'll stop now -- just grumpy today.

Was the dual-density particle board used by Altec for, e.g., the Model Fourteen loudspeaker cabinet, a metamaterial?
https://www.audiophilenirvana.com/audiophile-equipment-reviews/altec-lansing-model-14/
Maybe they got the technology from space aliens, eh?



source: http://www.lansingheritage.org/html/altec/specs/home-speakers/model-14.htm
OK, I'll stop now -- just grumpy today.
