Denon DR-M4
Dolby B NR Dolby C logo Wired Remote Control Full Logic Direct Drive Metal Tape 3 Head

This Denon DR-M4 is a stereo cassette deck with double Dolby B and C noise reduction, it was first sold by Denon in 1982 with a list price of USD $600 and discontinued 2 years later in 1984.

The main features of the Denon DR-M4 are: 3 heads and off-tape monitoring, digital linear tape counter with 4 digits, automatic tape type selection and capable of handling normal, chrome and metal tapes, 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 DR-M4 are generic digital peak reading meters. Full-logic transport controls used on the DR-M4 let it respond to the slightest finger contact for fast and effortless transport function selection.

Dolby C-type used in the DR-M4 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 DR-M4 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 DR-M4 filters out the pilot signal, and assuring proper Dolby processing of FM stereo programs.

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. All main transport commands can be issued remotely with a wired remote control.

Compact Cassette
  • 3 Head
  • Direct Drive
  • Fluorescent Peak Meter
  • Computer Servo Mechanism
  • Closed Loop 2 Capstan
  • Quartz Lock

Historic events

1982 Commodore announces the Commodore 64 computer.
1983 The Musical Instrument Digital Interface (MIDI) is introduced at the first North American Music Manufacturers (NAMM) show in Los Angeles.
1984 Pioneer Releases the world's first car CD player.

Features of Denon DR-M4

Connectors
Connectivity
2 Mono Microphone Inputs RCA Input/Output Connectors Headphones Wired Remote Control
Controls
Controls
Tape Length Selection
Display
Display
Digital Peak-Reading Meters Linear Tape Counter 4-Digıt Digital Counter Remaining Time
Electronics
Electronics
Record Protection
Cassette Exterior
Exterior
Orientation Left Black Finish Front Loading
Compact Cassette
General
Stereo
Head
Head Configuration
3 Head Desiǥn 4 Track / 2 Channel
Indicators
Indicators
Record Cassette Back Lighting
HighCom NR
Noise Reduction
Dolby-B Noise Reduction MPX Filter Double Dolby NR Circuits Dolby-C Noise Reduction
Controls
Operation
Full Logic Transport Control Record Mute Real-Time Tape Monitoring
Power
Power Requirements
Alternating Current
Preamplifier
Preamplifier
Individual Input Level Controls Output-Level Control
Tape Speed
Speed
1⅞ ips - 4.76 cm/s
Tape
Tape
Automatic Tape Type Selection Normal Tape Capabılity Chrome Tape Capabılity Metal Tape Capabılity
Transport
Transport
Servo Controlled Transport Auto Shutoff Quartz Controlled Transport Direct Drive (Capsŧan) Mechanical Tape Loading Dual-Capstan Transport

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