Four Track Stereo Tape Recorder
The Roberts 997 has all of the features of the 990 including four/two track stereo and monaural playback.
In addition it provides sound on sound recording, a stereo output speaker control panel with six stereo output jacks.
Track system: 4-track, 2-channel, stereo/monaural system
Heads: 1 x playback/record, 1 x erase
Reel size: 3, 5 or 7 inch reel
Tape speeds: 3 3⁄4 7 1⁄2 15 ips
Wow and flutter: 0.12% (7 1⁄2 ips)
Frequency response: 40Hz to 15kHz (7 1⁄2 ips)
Signal to Noise Ratio: 50dB
Valve complement: 6AR5, 6BQ5, 6X4, 12AD7, 6267
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