PLATIS 54 and PLATIS 65 are passive isolation platforms to minimase any vibrations reaching any audio components. Base frame is made from solid aluminium supported by adjustable feet. Top supporting plate is hard laminated plate reinforced with solid aluminium plate. You can also just purchase top plate( hard laminated plate only).
Upper plate and lower frame are separated by multi layer silicone & aluminium dampers which filter vibration in audible range. See DEWESOFT graph phpoto measured with DEWESOFT system:
DEWESOFT X DSA vibration system- modal hammer test
YELLOW GRAPH- vibration on audio component
RED GRAPH- vibration on audio component isolated by PLATIS 54