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Roberts 770X Reel to Reel

Roberts 770X Reel to Reel

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This unit is being sold on consignment AS IS, given that it is older reel to reel it is recommended that in addition to the sticker price it receive some attention from a tech - Marrs Audio can provide this service.

The Roberts 770X features include two separate amplifier units resulting in easy identification of channel controls, built in monitor speakers with on/off switch, the recording light is driven from the erase circuits, very positive lock-out to prevent accidental recording, sound on sound facility; dubbing from left to right, pause button which may be locked in either run or pause mode, and a tape tension idler with built in cleaning pad.

In addition, the end of tape can be set to either automatically stop the mechanism or turn off the entire machine.


Track system: 4-track, 2-channel, stereo/monaural system

Heads: 1 x playback/record, 1 x erase, 1 x bias

Motor: 2 speed hysteresis synchronous

Equalization: NARTB

Tape speeds: 1 78  3 34  7 12 ips

Wow and flutter: 0.15% (7 12 ips)

Frequency response: 40Hz to 20kHz (7 12 ips)

Signal to Noise Ratio: 45dB

Total harmonic distortion: 3%

Output power: 6 watts

Valve complement: 2 x EF86, 1 x 12AD7, 2 x 12AX7, 2 x 6X4, 1 x 6AR5

Dimensions: 20 x 14 x 9 inches

Weight: 48lbs

Note: optional 15 ips conversion kit