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Dolby B NR

The Rotel RD-25F is a stereo cassette deck with Dolby B noise reduction, it was introduced by Rotel in 1976 with a recommended retail price of USD $340 and discontinued 5 years later in 1981.

The main features of the Rotel RD-25F are: 2 heads, analog 3 digit tape counter, manual tape type selection with support for normal, chrome and ferro-chrome tapes with additional manual equalization selection, belt driven single-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 RD-25F are analog needle VU reading meters with peak indicator for easy adjustment of optimum recording level. Mechanical transport controls for reliable RD-25F transport function selection.

The Dolby-B system reduces tape hiss on tapes recorded on the RD-25F by as much as 10 dB at the highest frequencies. To further maintain recording accuracy, the RD-25F incorporates a switchable multiplex filter. When you record FM stereo broadcasts, the MPX filter of the RD-25F can be swiched on to prevent the standard 19kHz FM pilot signal from interfering with the noise reduction system.

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
  • Full Auto Stop
  • Super Hard Permalloy Head

Historic events

1976 Steve Jobs and Steve Wozniack incorporate the Apple computer company.
1977 AT&T completes it prototype of cell phone technology.
1978 Introduction of the laserdisc player, using technology invented already in the 1960s
1979 Introduction of Metal audio cassettes by 3M under the trade name Metafine.
1980 Worldwide sale of Rubik's Cube starts.
1981 IBM introduces the IBM PC.

Features of Rotel RD-25F

Calibration
Calibration
Bias Fine Tune
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
2 Head Desiǥn 4 Track / 2 Channel
Indicators
Indicators
Record Peak Indicator Dolby B
HighCom NR
Noise Reduction
Dolby-B Noise Reduction MPX Filter
Controls
Operation
Line / Mic Input Select Mechanical Transport Control
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
Manual Tape Type Selection Ferro-Chrome Tape Capabılity Normal Tape Capabılity Manual Tape Equalization Chrome Tape Capabılity
Transport
Transport
Auto Shutoff Mechanical Tape Loading Sìngle Capsŧan Transport Belt Drive (Capsŧan)

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Last update on May 5, 2024 8:52:39 AM CEST

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