Geoff mentions: "" But RFI has many ways of getting into the system inckuding via the air and from RF produced by microchips. ""
I would add that packing DAC and other HF producers, (if they do not get very hot anyway) Packing DAC with antistatic foam reduces the RFI re-entering the DAC chips etc and actually does reduce the noise in the audio signal.
On my current Mrantz I see no need, but my previous DAC an Adcom Da700 (which was just as good as a Bryston highly praised DAC compared in my own system) Took a LOT of money to beat the Adcom WITH the antistatic foam mod.
The black antistatic foam, not the blue. And since thefoam is electrically conductive, Imperative to protect the circuits from it touching them. And grounding the foam to the chassis.
In the Adcom the chassis never got very warm, even with being packed with the foam. IF the unit does get very warm I would not do this mod to it.
If I were rich and bored. I would make a flexible very thin non-conductive tray to fit various brand DAC units perfectly, and fill the tray with the foam and sell them. A vacuum table, borrowed unit to build a sample shape, and some wholesale 36"by 24" 1/8 and /4 inch foams and a ground..
I would add that packing DAC and other HF producers, (if they do not get very hot anyway) Packing DAC with antistatic foam reduces the RFI re-entering the DAC chips etc and actually does reduce the noise in the audio signal.
On my current Mrantz I see no need, but my previous DAC an Adcom Da700 (which was just as good as a Bryston highly praised DAC compared in my own system) Took a LOT of money to beat the Adcom WITH the antistatic foam mod.
The black antistatic foam, not the blue. And since thefoam is electrically conductive, Imperative to protect the circuits from it touching them. And grounding the foam to the chassis.
In the Adcom the chassis never got very warm, even with being packed with the foam. IF the unit does get very warm I would not do this mod to it.
If I were rich and bored. I would make a flexible very thin non-conductive tray to fit various brand DAC units perfectly, and fill the tray with the foam and sell them. A vacuum table, borrowed unit to build a sample shape, and some wholesale 36"by 24" 1/8 and /4 inch foams and a ground..