Alpine AL-51
Dolby B NR Dolby C logo Wired Remote Control Full Logic Metal Tape

This Alpine AL-51 is a stereo cassette deck with Dolby B and C noise reduction, it was first sold by Alpine in 1985.

The main features of the Alpine AL-51 are: 2 heads, mechanical 3 digit tape counter, automatic tape type selection and capable of handling normal, chrome and metal tapes, 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 AL-51 are generic digital peak reading meters. Full-logic transport controls used on the AL-51 let it respond to the slightest finger contact for fast and effortless transport function selection.

Dolby C-type used in the AL-51 provides 20 dB of noise reduction above about 1,000 Hz, fully doubling the amount given by B-type. 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 AL-51 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
  • Music Sensor
  • IC Logic Control
  • UC Head
  • Fluorescent Peak Meter

Historic events

1985 Sony and Philips produced the standard for Compact Disc Read Only Memory (CD-ROM) computer discs that would use the same laser technology as the audio CD.

Features of Alpine AL-51

Connectors
Connectivity
2 Mono Microphone Inputs AC Power Cord / Plug RCA Input/Output Connectors Headphones Wired Remote Control
Display
Display
3-Digıt Mechanical Counter Digital Peak-Reading Meters
Electronics
Electronics
Record Protection
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
Source/Tape Dolby C Play Dolby B Metal Tape Chrome Tape MPX Normal Tape
HighCom NR
Noise Reduction
Dolby-B Noise Reduction MPX Filter Dolby-C Noise Reduction
Controls
Operation
Music Scan Full Logic Transport Control Record Mute
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
Auto Shutoff Mechanical Tape Loading Sìngle Capsŧan Transport Belt Drive (Capsŧan)

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Last update on Apr 19, 2024 9:08:50 AM CEST

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