VAU1254 CD-PRO2LF  latest version 

The new grommets are manufactured by

E-A-R Specialty Composites from

Indianapolis USA The material is of a new generation not availble in 1982 when the original grommets were designed. 

At the link below the design guide for the grommets can be found.

 

http://www.earshockandvibe.com/pdfs/engineering/

literature/IsolatorsAndMoldedParts/highresguide.pdf

 

 

The suspension system of the CD module is build up with a spring and damping system. The spring is progressive and the damping is done via a grommet at the foot of the spring.  The free play of the metal chassis should be about 2 mm in all directions.  The retention ring locks the mechanism for abnormal bumps in the Y direction.  A mounting plate should be fixed firm and should not hang in a suspension it self as a double spring/mass system may come into oscillation.

The grommet and spring provide the correct damping.

Suspension used or not,  that is up to your own ideas. If not used a minimum dead mass of 7 Kg is recommended. If suspension is used only use one “spring mass system” and not a double suspension as this may lead to unwanted resonance frequencies. 

Phone :+31 475 468060

Fax     :+31 475 468061

Email  : info@diy-high-end.com