Absorption of digital hash

Berkeley uses material to absorb stray digital noise. Anyone know what they use?


@erik_squires . Like to improve my Oppo 205 without any upgrades. Just read about Berkeley as I'm considering dac upgrade ( or Spectral spinner). Still love disc movies on my Sony 4k. Mu metal for transformer 'may' be interesting. I'm just getting back to listening. Been busy w project. Relaxation coming up-again :)  Time to ponder hi-fi improvements. Your comments always interesting/informative/ mannerly :)

Just be aware that proper EMI/RFI interference shielding requires significant engineering knowledge and it is best done by professionals and requires very expensive specialist equipment. I see little point in trying ad-hoc solutions, it is very difficult to achieve a good shield at home. Do you really have a EMI/RFI radiation issue and how does it manifest itself?

@greg_f . In a review of Alpha Reference mention of "material" added to absord radiated digital noise, nothing complicated.