美国《士姆》公司研制成一种供盒式录音机用的新型磁带。这种磁带称为斯科契-曼达弗伊。它的性能明显越过目前常用的磁带(包括以二氧化铬为基体的磁带在内)。当最佳偏置电流及录音电平约为20分贝时,新磁带的最小谐波系数比以二氧化铬为基体的普通磁带要小,约为0.3％。而新磁带的最大录音电平比普通磁带要高出7～9分贝。斯科契-曼达弗伊的高性能是 The United States “Shimu” company developed into a cassette tape for the new tape. This tape is called Scotch-Mandafoy. Its performance significantly over the current commonly used tape (including chromium-based tape, including tape). When the best bias current and recording level of about 20 decibels, the minimum harmonic coefficient of the new tape is smaller than the ordinary tape based on chromium dioxide, about 0.3%. The new tape’s maximum recording level than ordinary tape to be higher than 7 to 9 dB. The high performance of Skoc-Mndafoy is