64 X

About the 64 X

The Tandberg 64 X is a high-fidelity reel-to-reel tape recorder produced by Tandberg Radio in Oslo, Norway, from 1966 to 1968. It supports four-track stereo and monaural recording and playback with three selectable tape speeds: 7.5, 3.75, and 1.875 inches per second. The frequency response ranges from 30 Hz to 20 kHz at the highest speed, with channel separation better than 60 dB. The unit uses a synchronous motor and features four separate tape heads: erase, record, playback, and a unique cross field bias head that feeds a bias signal from behind the tape across to the opposite channel record head, reducing distortion during recording. The 64 X is a hybrid design incorporating 10 vacuum tubes, 8 transistors, and 2 selenium rectifiers. It has a wooden cabinet with silver and black finish and weighs approximately 30 lbs. Dimensions are about 16 x 12 x 6 inches (394 x 298.5 x 171.5 mm). The U.S. version operates on 115V 60 Hz AC with an interlock system for mains input. It was originally The transport mechanism is noted for reliability, though some units may require audio refurbishing due to age. This model is regarded as a classic vintage tape recorder with excellent sound quality for its era.