Esoteric RFI/EMI repellants are beginning to appear in various guises in audiophile
applications. There’s Stillpoint’s now declassified but formerly military-secret ERS cloth
and the Japanese GC-303 material used by Furutech and Zanden Audio. There’s Z-Cable’s
ERS-derivative Z-Sleeve technology [left] and whatever hi-tech composition is used in
HMS’ newest Silenzio noise blockers presently taking Europe by storm [right]. There’s an
unnamed material inside Jerry Ramsey’s top-line Audio Magic Eclipse conditioner and
the patented FE-Si granules of Shunyata Research’s Caelin Gabriel. There’s the fact that
the chief ingredient of ERS is carbon fiber which makes one suspicious whether,
perchance, Carbon fiber shelving properly engineered didn’t bestow secondary
inter-component shielding benefits besides effective resonance control. Regardless,
protection from radio-frequency and electromagnetic interference, as a sign of the times,
has become mandatory for high-performance audio. Just think computers, cell and
wireless phones, radar detectors. Their operative bandwidths keep going up in frequency
as transmitter bands formerly occupied by the m