OTARI MX7000series
Price unknown (around 1972)
Commentary
A tape deck developed for professionals.
3-motor 4-head configuration is adopted.
The head assembly can be replaced by a plug-in, and you can select your favorite recording format from 1 channel to 4 channels (synchronous playback is possible).
The capstan motor uses a specially designed 3-speed hysteresis synchronous motor.
Aluminum alloy is used for the base part of the mechanism to improve durability.
All transistors are used for the internal circuit.
There are six variations of the MX7000 depending on the recording method and head configuration, and four of them (MX7000-F, MX7000-H, MX7000-3X, MX7000-QX) were made to order.
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Model Rating
| Series Type | Recording system | Head configuration | Number of amplifiers |
| E R P P | |||
| MX7000-F | Full Track, Mono | F F F - | 1 |
| -H | Half-track, monaural | H H H - | |
| MX7000-2S | 2 tracks, stereo | 2 2 2 4 | 2 |
| -4S | 4-track 2-channel stereo | 4 4 4 2 | |
| MX7000-3X | 3 tracks, stereo | 3 3 3 - | 3 |
| -QX | 4-track quad stereo | F 4 4 - | 4 |
| Type | Tape deck |
| Tape Width | 1/4 inch |
| Reel | 10 1/2 "max. |
| Tape speed | 9.5cm/s, 19cm/s, 38cm/s |
| Heads | 4-head system (see head configuration) |
| Tape velocity deviation | + / - 0.2% or less |
| Wow and flutter | 9.5cm/s : not more than 0.08% 19cm/s : not more than 0.06% 38cm/s : not more than 0.04% |
| Capstan | 1 Capstan drive system Use of 3-speed hysteresis synchronous motor |
| Reel motor | Uses 2 high-performance torque motors |
| Input signal (0 dB = 0.775 V) | Line input : -20dB / unbalanced 50k Ω (Balanced at 600 Ω with optional transformer) Microphone input : -55dB / unbalanced 10k Ω (Balanced at 600 Ω with optional transformer) * Canon connector used for both. |
| Output signal | Line output : + 4 dB (0 VU) / balanced 600 Ω Monitor output : -3dB / unbalanced 10k Ω * Canon connector used for both. |
| Amplifier section | All-transistor configuration (12 diodes, 4 zener diodes, 27 transistors, 2 silicon rectifiers (bridges)) Each channel independent system 90L catalogue with sound input, playback output, VU meter for bias current monitoring With Sound Recording Safety Switch Recording and Playback With High Frequency Correction Circuit Built-in test oscillator With synchronized playback circuit |
| Overall frequency characteristic | 9.5cm/s : 40 Hz to 8 kHz ± 2 dB 19cm/s : 40 Hz to 15 kHz ± 2 dB 38cm/s : 30 Hz to 18 kHz ± 2 dB |
| Signal-to-noise ratio | 60 dB from peak level |
| Synchronized playback | 50 dB or more (from peak level) |
| Crosstalk | 50 dB or More (1 kHz) |
| Distortion factor | Not more than 1% at standard level |
| Bias frequency | 150kHz |
| Test signal generator | 700 Hz, 10 kHz |
| Pwer | Single Phase 100V/117V/220V/230V, AC, 50Hz/60Hz |
| External dimensions | Width 517x Height 790x Depth 463 mm |
| Weight | Approximately 50 kg |
| Attachment | Reel Clamper (1 Set of 2) TW-661 Cree Nerset TY-502 Reel Thickness Correction Sheet (2-Pack) TY-506 Motor Pulley 50 Hz or 60 Hz TC412-006A/B Phase Ramp Phase 3, Lamp 1 (FS-19-3A, FS-19-1A, HC-603A) Wrench Set TY-507 Splicing Tape TY 504 Accessory Case TY-511 Capstan Belt TB-9146-12 |