It turns out that these "Isoblocks" are commercially made and not designed or tuned by Mapleshade and are available for 29 cents each. See link below ....
The REAL isoblocks
Dedicated to the restoration and preservation of all original Dynaco tube audio equipment - Customer support for Tubes4hifi VTA tube amp and preamp kits and all Dynakitparts.com products
$300k turntables, or two-bit shock-absorbers?Eskimo wrote:Did you know that our friend, Kevin at Dynakits sells the same thing