đĩa KAB SpeedStrobe Turntable Speed Tester Strobe Disc & Test Light

Works on both 50 Hz and 60 Hz Powered Turntables! Speed accuracy, without it, you might as well turn the record by hand. Speed accuracy effects so many different and exceedingly important aspects of LP playback, that having a means of testing it is paramount. The KAB SpeedStrobe is the only optical disc measuring system. Any strobe disc can set speed, only the KAB SpeedStrobe can measure it! The KAB SpeedStrobe light is quartz crystal controlled for unsurpassed accuracy, sixteen times greater than your Utility Co.! Battery operated (9V included), the KAB SpeedStrobe works anywhere in the world with no need for 50Hz & 60Hz models. A speed change of approximately 6% will alter pitch a full sharp or flat! Broadcast accuracy is 0.3% or better and the KAB SpeedStrobe can measure accuracy better than 0.03%! The digital strobe light is much more effective than other systems that only use the incandescent light from the environment. Buy it, use it, sleep well at night... Stereophile Recommended Component! "It's just fantastic. It looks cool and it's a snap to perfectly set the speed!" Jonathan Scull, Stereophile. Specifications: Speeds: 16,33,45,70 -90 RPM, Accuracy: 99.99% Display Frozen, Disc Size: 10", 15 Mil thick PVC, Light: 3000 Mcd red illumination, Frequency: 60 Cycles per second.