Lo-D D-90s
Dolby B NR Full Logic Metal Tape 3 Head

This Hitachi D-90s is a stereo cassette deck with double Dolby B noise reduction, it was first sold by Hitachi in 1979 with a recommended retail price of USD $450 and discontinued 5 years later in 1984.

The main features of the Hitachi D-90s are: 3 heads and off-tape monitoring, mechanical 3 digit tape counter, manual tape type selection and capable of handling normal, chrome, ferro-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.

Level meters used on the D-90s are analog needle VU reading meters. Full-logic transport controls used on the D-90s let it respond to the slightest finger contact for fast and effortless transport function selection.

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

The Dolby-B system reduces tape hiss on tapes recorded on the D-90s by as much as 10 dB at the highest frequencies. The three-head configuration of the D-90s requires a Double Dolby system, one for recording and one for playback.

To make live recordings this deck has 2 microphone inputs to connect microphones with a jack connector. 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.

Compact Cassette
  • Close Gap 3 Head System
  • Dual Capstan
  • Dual Capstan
  • IC Logic Control
  • 2 Motor
  • IC Logic Control
  • 2 Motor

Historic events

1979 Nike's Air technology patented by inventor M. Frank Rudy is introduced in the Tailwind running shoe.
1980 Dolby C Noise Reduction introduced by Dolby Laboratories.
1981 Sony introduces the "micro" (3½-inch) floppy disk drive the OA-D30V
1982 The Microfloppy Industry Committee agreed upon a 3½-inch floppy specification.
1983 TV Series The "A-Team" with Mr T premieres on NBC.
1984 The Ferrari Testarossa, a two-door coupé, premiered at the Paris Auto Show.

Features of Hitachi D-90s

Calibration
Calibration
Manual Level Calibration
Connectors
Connectivity
2 Mono Microphone Inputs RCA Input/Output Connectors Headphones
Display
Display
3-Digıt Mechanical Counter Analog Needle Meters
Cassette Exterior
Exterior
Silver Finish Orientation Left Front Loading
Compact Cassette
General
Stereo
Head
Head Configuration
3 Head Desiǥn 4 Track / 2 Channel
Indicators
Indicators
Record Play Pause Cassette Back Lighting
HighCom NR
Noise Reduction
Dolby-B Noise Reduction Double Dolby NR Circuits
Controls
Operation
Full Logic Transport Control Timer Recording/Playback Line / Mic Input Select Record Mute Real-Time Tape Monitoring
Preamplifier
Preamplifier
Individual Input Level Controls Output-Level Control
Tape Speed
Speed
1⅞ ips - 4.76 cm/s
Tape
Tape
Manual Tape Type Selection Ferro-Chrome Tape Capabılity Normal Tape Capabılity Chrome Tape Capabılity Metal Tape Capabılity
Transport
Transport
2x Motor Mechanism Auto Shutoff Mechanical Tape Loading Dual-Capstan Transport Belt Drive (Capsŧan)

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Last update on Feb 15, 2025 1:50:00 PM CET

Similar to Hitachi D-90s from the period 1979 - 1984