Hello,

Newer member and owner here but want to start adding to topics when possible.

What is our goal here in regards to dampening/isolation besides better sound?  More specifically, are we trying to dampen vibrations induced onto the nos1a chassis?  Are we hoping to isolate the device from structural occurrences from a rack or supporting device?

These are two different problems but I might offer up some possible solutions with solid physics behind them.

1) To dampen chassis vibration best would be done with the usage of constrained layer dampening techniques.  The ideal would be to use the same material type and thickness as to which the chassis is constructed from.  Keeping the material stiffness properties the same is the ideal.  Using this matterial one would apply a mastic or non-hardening adhesive between the layers.  Only a fraction of the surface area needs to be covered to be effective.  This technique is commonly used in luxury automobiles to reduce cabin noise across a wide frequency range.

2) There has been a technique which I heard about for isolating a device from structures that might be able to be implemented here.  Suspending a device with the use of woven nylon rope.  What? Nylon rope is made from many, many individual fibers.  These fibers actually rub against each other thereby disipatting energy transfer. 

My thoughts would be to take smaller pieces of the same gauge steel and attach them to the nos1a chassis using Liquid Nails subfloor adhesive.  This will provide CLD for the chassis.  Using the same wooden cutting board that's others seem to like here I would build a small structure to span over the nos1a.  Braided nylon rope would the be used to attach the cutting board to the overhead structure.  The dac would then sit on the cutting board held off the ground by the rope.  If one would want to take it another step then you could take two cutting boards and make a CLD sandwich from them.

Just my initial thoughts here from a guy who tends to hate tweaks.

Regards,
Joel