The optimum use of a disc record of constant rotational speed occurs when the innermost recorded diameter is half of the outermost recorded diameter. But why worry yourself with the details. The Crosley Portable Suitcase Style Turntable plays all three speeds, 33 1/3, 45 and 75 RPM records. By the late fifties, stereo records reached a pe
ไม่มีความคิดเห็น:
แสดงความคิดเห็น