Sanyo RD-4600
Dolby B NR Soft Touch

The OTTO RD 4600 is a stereo cassette deck with Dolby B noise reduction, it was introduced by OTTO in 1974 and discontinued 2 years later in 1976.

The main features of the OTTO RD 4600 are: 2 heads, analog 3 digit tape counter, manual tape type selection with support for 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 RD 4600 are analog needle VU reading meters. Soft-touch controls for fast and easy transport function selection of the RD 4600.

The Dolby-B system reduces tape hiss on tapes recorded on the RD 4600 by as much as 10 dB at the highest frequencies.

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.

Compact Cassette
  • Full Auto Stop

Historic events

1974 Intel releases the 8080 processor, the 8-bit successor to the original 8008.
1975 TDK unveiled its SA (Super Avilyn) line of tapes, the first nonchrome high-bias tape.
1976 Shugart Associates introduced the first 5.25" floppy disk (FDD).

Features of OTTO RD 4600

Connectors
Connectivity
2 Mono Microphone Inputs Headphones
Display
Display
3-Digıt Mechanical Counter Analog Needle Meters
Cassette Exterior
Exterior
Silver Finish Orientation Left Top Loading Wood Case
Compact Cassette
General
Stereo
Head
Head Configuration
2 Head Desiǥn 4 Track / 2 Channel
HighCom NR
Noise Reduction
Dolby-B Noise Reduction
Controls
Operation
Soft Touch Transport Control
Preamplifier
Preamplifier
Individual Input Level Controls
Tape Speed
Speed
1⅞ ips - 4.76 cm/s
Tape
Tape
Normal Tape Capabılity Manual Tape Type Selection Chrome Tape Capabılity
Transport
Transport
Sìngle Capsŧan Transport Belt Drive (Capsŧan) Mechanical Tape Loading Auto Stop

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Similar to OTTO RD 4600 from the period 1974 - 1976