Nakamichi 681ZX
Dolby B NR Dolby C logo Wired Remote Control Full Logic Metal Tape 3 Head

This Nakamichi 681ZX is a stereo cassette deck with double Dolby B and C noise reduction, it was first sold by Nakamichi in 1981 with a recommended retail price of USD $1,600.

The main features of the Nakamichi 681ZX are: 3 discrete heads and no off-tape monitoring to save production cost, mechanical 3 digit tape counter and memory stop, manual tape type selection and capable of handling normal, chrome and metal tapes, belt driven dual-capstan transport.

Typical front loading cassette deck with the cassette compartiment located on the left side of the deck. Tape eject is operated mechanically and the cassette needs to be placed with the side to be played facing forward in the cassette well which is opened by a damped mechanism. Additionally the compartement can be accessed easly for head cleaning by removing the well-cover.

Level meters used on the 681ZX are digital FL peak reading meters. Full-logic transport controls used on the 681ZX let it respond to the slightest finger contact for fast and effortless transport function selection. Playback speed may be adjusted with pitch control. Cue and review can be used to easily and quickly locate the beginning of a passage at two speeds.

Record azimuth correction. To ensure the best response from the wide variety of tapes available adjustment of, bias and sensitivity, to optimum levels can be performed prior to recording.

Dolby C-type used in the 681ZX provides 20 dB of noise reduction above about 1,000 Hz, fully doubling the amount given by B-type. The three-head configuration of the 681ZX requires a Double Dolby system, one for recording and one for playback. The 19kHz multiplex pilot slgnal present in FM stereo broadcasts can cause false triggering of the noise reduction system. The switchable MPX filter of the 681ZX filters out the pilot signal, and assuring proper Dolby processing of FM stereo programs.

For undisturbed listening a jack connector for a pair of stereo headphones is supplied. Connection to other audio components for plaback can be achieved by a RCA cable and recording from a source by a RCA cable. All main transport commands can be issued remotely with a wired remote control.

Compact Cassette
  • Diffused-Resonance Transport
  • Pressure pad lifter
  • Digital Fluorescent Display
  • Double Capstan
  • Silent Mechanism
  • RAMM (Random Access Music Memory)
  • Auto Azimuth Alignment
  • Asymmetrical Dual Capstans
  • Discrete 3-Head Technology

Historic events

1981 The Pacman and Donkey Kong video games are written, and go on to become huge hits

Features of Nakamichi 681ZX

Calibration
Calibration
Manual Bias Calibration 15kHz Test Tone Auto Azimuth Calibration 400Hz Test Tone Auto Level Calibration
Connectors
Connectivity
Wired Remote Control DC Power Output For BlackBox Series RCA Input/Output Connectors Headphones
Display
Display
Track Indicator 3-Digıt Mechanical Counter Digital FL Peak-Reading Meters
Electronics
Electronics
Record Protection
Cassette Exterior
Exterior
Orientation Left 19-Inch EIA Rack Mounting Black Finish Front Loading
Compact Cassette
General
Stereo
Head
Head Configuration
Pressure Pad Lifter 3 Head Desiǥn 4 Track / 2 Channel Seperate Record and Playback Heads
Indicators
Indicators
Illuminated Cassette Compartment
HighCom NR
Noise Reduction
Dolby-B Noise Reduction Double Dolby NR Circuits Dolby-C Noise Reduction MPX Filter
Controls
Operation
Full Logic Transport Control Pitch Control Music Scan Timer Recording/Playback Record Mute Memory Stop Removable Well Cover 2-Speed Cueing Damped Eject
Power
Power Requirements
Alternating Current
Preamplifier
Preamplifier
Individual Input Level Controls Output-Level Control Master Record Level Control
Tape Speed
Speed
1⅞ ips - 4.76 cm/s
Tape
Tape
Manual Tape Type Selection Normal Tape Capabılity Chrome Tape Capabılity Metal Tape Capabılity 2-Position Equalization Selector
Transport
Transport
Mechanical Tape Loading Idler Drive (Reel) Belt Drive (Capsŧan) Belt Drive (Mechanism) 4x Motor Mechanism Belt Drive (Azimuth Adjustment) Auto Shutoff Slack-Tape Takeup Dual-Capstan Transport

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Last update on Nov 8, 2024 1:47:44 PM CET

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