Synergistic Research Black Box Carbon 211 tubes Additionally the coil housing is

Additionally the coil housing is manufactured from a cobalt iron alloy (Permadur) that has special magnetic characteristics

David Abramson of The StereoTimes wrote (August 2023):

they're sold out

two-channel acoustic field generator

Synergistic Research Black Box Carbon 211 tubes Additionally the coil housing isOver a decade ago, Synergistic Research introduced a transformative broad spectrum low frequency resonator array called the Black Box that eliminates bass nodes and room modes while expanding your rooms ability to accurately portray low frequency information and spatial content. Working from the principle that all frequencies in the audible bandwidth are linked through harmonics, the original Black Box balances low frequencies, mid range, and high