Technics RS-686DS
Dolby B NR 3 Head

This Technics RS-686D is a stereo cassette deck with Dolby B noise reduction, it was first sold by Technics in 1977 with a manufacturer suggested retail price of USD $650 and discontinued 3 years later in 1980.

The main features of the Technics RS-686D are: 3 discrete heads and off-tape monitoring, mechanical 3 digit tape counter, manual tape type selection and capable of handling normal and chrome tapes, belt driven single-capstan transport.

Typical of this deck is the 70's top loading layout 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 RS-686D are analog needle VU reading meters with peak indicator for easy adjustment of optimum recording level. Mechanical transport controls for reliable RS-686D transport function selection.

The Dolby-B system reduces tape hiss on tapes recorded on the RS-686D by as much as 10 dB at the highest frequencies. A Subsonic filter is provided in the RS-686D to prevent infrasonic signals generated when playing a warped record. These signals can upset the Dolby system and prevening it from functioning properly.

To make live recordings this deck has 2 microphone inputs to connect microphones with a jack connector. For undisturbed listening a mini-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
  • HPF Head
  • Antirolling
  • SP Head (Super-Permalloy)
  • End Eye

Historic events

1977 Tandy Radio Shack released its version of a personal home computer called the TRS-80.
1978 Technics introduced the famous SL-1200MK2 turntable
1979 The video game "Asteroids" is created.
1980 Worldwide sale of Rubik's Cube starts.

Features of Technics RS-686D

Connectors
Connectivity
2 Mono Microphone Inputs RCA Input/Output Connectors Headphones Headphones
Display
Display
3-Digıt Mechanical Counter Analog Meter Light Switch Analog Needle Meters Display On/Off
Electronics
Electronics
Peak Limiter
Cassette Exterior
Exterior
Shoulder Strap Connector Orientation Left Top Loading Black Finish
Compact Cassette
General
Stereo Portable Built-in Monitor Speaker
Head
Head Configuration
3 Head Desiǥn 4 Track / 2 Channel Seperate Record and Playback Heads
Indicators
Indicators
Record Peak Indicator End of Tape Indicator
HighCom NR
Noise Reduction
Dolby-B Noise Reduction Subsonic Filter
Controls
Operation
Battery Check Line / Mic Input Select Speaker Volume Control Mechanical Transport Control Real-Time Tape Monitoring
Preamplifier
Preamplifier
Tone Control Individual Input Level Controls 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 2-Position Equalization Selector
Transport
Transport
Tape Tension Control Mechanical Tape Loading Auto Stop Sìngle Capsŧan Transport Belt Drive (Capsŧan)

Similar to Technics RS-686D from the period 1977 - 1980

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