This review page is supported in part by the sponsors whose ad banners are displayed below As there is no online English information about the Air Cables, I asked the company for first-hand information. Here’s the business owner’s reply: "Why did Okutsu Denko as an electrical installation company become an audio cable manufacturer? It started in 2000 when power cables were being recognized as an important sound improvement audio accessory. I had a chance to try several electrical cables used for electrical installations in my private recording studio which I run as my hobby. There I came across an interesting fact. I found a remarkable difference in sound with different electrical cables (VVF and EM-EEF) and discovered that it was due to different insulating materials. "The structure of VVF and EM-EEF cables is basically the same. The only difference is the dielectric directly covering the conductor. The dielectric constant of the insulation had some influence on the sound quality. What dielectric material has the lowest dielectric constant ? Air*. Unfortunately there were no power cords with air insulation excepting a special heavy duty cable for high voltage equipments and a power line between naked conductors. I thus decided to produce an air dielectric power cable of my own design. _______________________________________________________________________ * Serguei Timachev at Stealth Audio Cables would find helium even superior to air. Ed "To finalize it, I installed Digidesign ProTools HD and performed several tests with professional recording engineers. The first beta samples were tested by Japanese musicians and recording engineers and their very positive feedback had me decide to proceed with the formal production of the Air Cable. As soon as it obtained PSE—the Japanese electrical safety standard—I applied for a patent of the cable’s inner structure. I also designed a special connection method between power plug and air cable (patent pending) because a normal power plug is unable to tightly connect to the cable’s air tubes. Five years after starting development, this epoch-making air cable was finally released to market." Sound. A selection of recording used during the auditions. Blade Runner, soundtrack, Vangelis, Universal, UICY-1401/3, Special Edition 3 x CD (1982/1991/2007); Paganini for two, Gil Shaham, Göran Söllscher, Deutsche Grammophon/JVC, 480 246-5, XRCD24 (1993/2009); Chet Baker, It could happen to you, Riverside/ZYX-Music, OJC20 303-2, 20-bit Super Bit Mapping CD (1958/1987); Chopin, 4 Scherzi, Ivo Pogorelich, Deutsche Grammophon, 439 947-2, CD (1998); Diorama, The art of creating confusing Spirits, Accession Records, EFA 23450-2, CD (2004); e.s.t. Esbjörn Svenson Trio, 301, ACT Music + Vision, ACT 9029-2, CD (2012); Ella Fitzgerald & Louis Armstrong, Ella and Louis, Verve/Lasting Impression Music, LIM UHD 045, UltraHD CD (2010); Glen Gould, Bach: The Art Of The Fugue, Sony Music/Sony Classical, SMK 52 595, The Glen Gould Edition, SBM CD (1997)... ... Händel, Arias for Cuzzoni, Simone Kermes, Lautten Compagney Berlin, Wolfgang Katschner, Berlin Classic, 0016422BC, CD (2009); Jean Michel Jarré, Magnetic Fields, Epic/Sony Music, 488138 2, CD (1981/1997); Lisa Gerrard, The Silver Tree, 4AD/Sonic Records, SON212, CD (2006); Manaam, Się ściemnia…, Kamiling Co./Pomaton, 957952, CD (1991/2011); Nosowska, 8, Supersam Music, SM 01, CD (2011); Novika, Tricks of life, Kayax 013, CD (2006); Paul McCartney, Kisses On The Bottom, Universal International [Japan], UCCO-3038, SHM-CD (2012); Sara K., Don’t I Know You From Somewhere?, Stockfisch, SFR 357.6055.2, CD; The Modern Jazz Quartet, The Sheriff, Atlantic/Warner Music Japan, WPCR-25129, CD (1964/2006).