Introduced in 1982, the TEAC Z-6000 was a three-head, four-motor Master Cassette Deck developed as part of TEAC’s Z-Series. Positioned between the fully automated Z-7000 and the simpler Z-5000, the TEAC Z-6000 combined a rigid die-cast chassis, three direct-drive motors, closed-loop dual-capstan transport, separate record and playback heads, manual recording calibration, three noise-reduction systems and extensive computer-controlled operating functions. Its substantial construction and comprehensive adjustment facilities were intended for users who required precise control over cassette recording and reproduction.
The TEAC Z-6000 was built around a solid die-cast chassis designed to resist vibration, resonance and mechanical warping. This rigid foundation supported the complete transport assembly and helped maintain accurate alignment between the motors, capstans, tape guides and heads. TEAC applied construction methods associated with its open-reel recorders to create a cassette transport capable of maintaining stable tape movement and consistent head contact.
Three independent direct-drive motors were used in the transport. A frequency-generator servo-controlled brushless DC motor directly drove the capstan system, while separate coreless DC motors powered the left and right reel tables. A fourth DC control motor operated the transport mechanism and provided precise head loading. Directly driving the capstan and both reel tables reduced dependence on intermediate belts and complex mechanical transmission systems. The independent reel motors allowed take-up and supply functions to be controlled separately, while the servo capstan motor maintained accurate tape speed.
A closed-loop dual-capstan system held the tape under controlled tension across the head assembly. The tape travelled between two capstans and pinch rollers, isolating the recording and playback area from disturbances originating within the cassette shell. This arrangement helped maintain stable tape-to-head contact and contributed to the specified wow and flutter figure of 0.019% weighted RMS.
The transport used high-precision ceramic tape guides. Ceramic was selected for its dimensional stability, resistance to wear and ability to maintain consistent tape positioning over extended use. The guides controlled the tape as it passed the erase, record and playback heads, supporting accurate tracking and repeatable recording performance. The TEAC Z-6000 used a three-head system with separate erase, record and playback heads. Independent record and playback heads allowed the recorded signal to be monitored directly from the tape while recording and permitted each head to be designed for its particular function.
The playback head used a high-precision ferrite construction, while the recording head used Sendust material selected for its magnetic recording characteristics. The record and playback heads were integrated into a single housing to maintain consistent alignment and minimise azimuth differences between the two gaps. Special playback-head symmetry was used to reduce contour-effect problems. This helped maintain consistent low-frequency reproduction by controlling the physical and magnetic relationships within the playback head assembly.
The playback head was directly coupled to the playback equaliser amplifier. Its field-effect transistor input stage provided a high input impedance and reduced the need for additional signal-path components. The amplifier used a bipolar power supply to support circuit stability, dynamic range and low distortion. Manual recording calibration was a central feature of the TEAC Z-6000. Separate controls were provided for bias, recording level and recording equalisation, allowing the deck to be matched to the characteristics of individual cassette formulations.
The calibration system included independent left and right controls for normal, chromium dioxide and metal tape. An internal oscillator generated the required test signals, while the fluorescent level meters allowed the operator to observe the results and adjust each channel. Factory reference settings were also provided for normal, chromium dioxide and metal formulations. These settings allowed rapid operation when detailed calibration was not required, while the manual controls remained available for optimising a particular tape.
Calibration was carried out by recording and monitoring the internal test signals through the three-head system. The operator could adjust level, bias and equalisation while listening to or viewing the signal reproduced directly from the tape. This provided immediate confirmation of the effect of each adjustment. The TEAC Z-6000 supported normal, chromium dioxide and metal tape formulations. Its tape-selection system configured the recording and playback electronics for the chosen tape type, while the calibration controls provided further adjustment within each category.
Three noise-reduction systems were incorporated. Dolby B provided compatibility with the most widely used cassette noise-reduction standard, while Dolby C offered greater noise reduction for recordings made and reproduced with the system engaged. The deck also included dbx noise reduction. With dbx engaged, the TEAC Z-6000 was specified for an overall signal-to-noise ratio of 92dB. Dolby C provided a specified signal-to-noise ratio of 82dB, while Dolby B provided 72dB at 5kHz. With noise reduction switched off, the overall signal-to-noise ratio was specified at 60dB.
The dbx system provided complementary compression during recording and expansion during playback. It could also be used to reproduce commercially issued dbx-encoded recordings. Dolby B and Dolby C provided compatibility with recordings made using those respective systems. A switchable MPX filter was provided for recording FM stereo broadcasts. The filter removed the 19kHz pilot tone used in stereo broadcasting, preventing it from interfering with Dolby noise-reduction operation. The filter could be switched off when recording other sources to preserve the full available frequency response.
The TEAC Z-6000 incorporated a computer-controlled programme system. Intro Check played a short sample from the beginning of each recorded selection, allowing the operator to identify programmes without listening to each one in full. The CPS programme-search system detected unrecorded spaces between selections and automatically located the beginning of a chosen programme. The operator selected the required programme number, and the transport searched in sequence before entering playback at the selected position.
Memory Stop allowed the deck to return to the 0000 counter position and stop. Memory Play returned the tape to the same position and automatically began playback. These functions used the electronic tape counter rather than a conventional mechanical counter. A programmable Memory Repeat function allowed two counter positions to define the beginning and end of a playback section. The TEAC Z-6000 could then reproduce the selected passage repeatedly. It could also perform repeated playback of complete selections.
The digital real-time tape counter displayed the tape position in minutes and seconds. Because the counter was controlled by the microprocessor and calculated tape movement electronically, it provided more useful positional information than a conventional arbitrary mechanical count. Thirty-segment fluorescent peak-level meters displayed the recording and playback levels for both channels. Their multi-colour display and one-second peak-hold function allowed transient peaks to remain visible briefly, assisting with accurate recording-level adjustment.
The meters were also used during manual tape calibration. Their fast response allowed the operator to compare reference signals and observe small differences between the source and the signal reproduced from tape. Separate left and right preset recording-level controls allowed the channel balance to be established before recording. Once the individual levels had been set, a master fader adjusted both channels together while preserving their relative balance.
The master fader could also be used for manually controlled fade-ins and fade-outs. This separated programme-level changes from the channel-balance adjustments and allowed the overall recording level to be altered with a single control. Record Mute inserted approximately four seconds of silence into a recording. This provided a consistent unrecorded interval between selections and supported the programme-search system by creating a clear gap for detection.
Monitor Sync automatically selected the appropriate monitoring source according to the transport condition. During recording, the deck could monitor the signal reproduced from tape, while other operating modes selected the appropriate source automatically. A pitch control provided approximately ±10% variation in playback speed. This allowed recorded material to be matched to a musical instrument, corrected for tapes recorded at a slightly different speed or altered for specialised playback requirements.
Timer-controlled recording and playback were supported when the deck was connected to a suitable external timer. The selected operating mode could begin when mains power was applied. Power-assisted eject provided controlled opening of the cassette compartment. The transport also included an electronic control system for smooth and precise mode changes.
Front-panel microphone inputs were provided for the left and right channels. A headphone socket with adjustable output level allowed private monitoring during recording, calibration and playback. The output-level control adjusted the signal delivered to connected equipment. Gold-plated rear-panel input and output sockets were used to maintain reliable electrical contact.
The TEAC Z-6000 was supplied with the RC-201 remote-control unit. This provided access to the principal transport functions away from the front panel. Input and output cables and a screwdriver for calibration adjustment were also included. Frequency response was specified from 20Hz to 22kHz within ±2dB using metal tape, from 20Hz to 21kHz within ±2dB using chromium dioxide tape and from 20Hz to 20kHz within ±2dB using normal tape.
Fast-forward or rewind time was approximately 80 seconds with a C-60 cassette. Line-input sensitivity was 60mV into 50kΩ, while microphone-input sensitivity was 0.25mV with an applicable microphone impedance of 200Ω or greater. The line output delivered 0.3V into a load of 50kΩ or greater. The headphone amplifier provided a maximum output of 100mW into an 8Ω load.
The TEAC Z-6000 was built into a large enclosure measuring 163mm high, 432mm wide and 437mm deep. Its weight of 16.4kg reflected the die-cast chassis, four-motor transport, extensive control electronics and substantial mechanical construction. The TEAC Z-6000 represented the manually calibrated model within TEAC’s Z-Series Master Cassette Deck range. It retained the three direct-drive motors, closed-loop dual-capstan transport, three-head monitoring, dbx and Dolby noise reduction and computerised programme functions of the series while giving the operator direct control over recording bias, level and equalisation.
Features
- Solid die-cast transport chassis
- Three-head recording and playback system
- Separate erase, record and playback heads
- Integrated record and playback head assembly
- Sendust recording head
- Ferrite playback head
- Special playback-head symmetry
- Direct-coupled playback equaliser amplifier
- Field-effect transistor playback amplifier input
- Bipolar amplifier power supply
- Four-motor transport system
- Three direct-drive transport motors
- Frequency-generator servo brushless direct-drive capstan motor
- Two independent coreless direct-drive reel motors
- Dedicated transport-control motor
- Closed-loop dual-capstan tape transport
- High-precision ceramic tape guides
- Manual recording-bias calibration
- Manual recording-level calibration
- Manual recording-equalisation calibration
- Independent left and right calibration controls
- Factory reference settings for normal, chromium dioxide and metal tape
- Normal, chromium dioxide and metal tape compatibility
- Dolby B, Dolby C, dbx noise reduction
- Switchable MPX filter
- Thirty-segment fluorescent peak-level meters
- One-second peak-hold function
- Digital real-time tape counter
- CPS programme search
- Intro Check programme sampling
- Memory Stop function
- Memory Play function
- Programmable Memory Repeat
- Monitor Sync function
- Record Mute with four-second automatic spacing
- Separate left and right preset recording-level controls
- Master recording fader
- Manual fade-in and fade-out control
- Approximately ±10% pitch control
- Timer-controlled recording and playback
- Power-assisted cassette eject
- Adjustable output level
- Separate left and right microphone inputs
- Adjustable headphone output
- Gold-plated input and output connectors
- Supplied RC-201 remote-control unit