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AEG Magnetophon 21 (M21-1)



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Brand: Aeg

The AEG Magnetophon 21 (also known as the M21-1) was a groundbreaking audio recording device released by the German company AEG (Allgemeine Elektricitäts-Gesellschaft) in 1953. This magnetic tape recorder was a significant advancement in the history of sound recording, as it introduced the concept of magnetic tape as a practical and affordable medium for recording sound.The Magnetophon 21 featured two separate tape players and recorders on a single device. It utilized a half-inch (12.7mm) magnetic tape, which could record up to 14 1/2 minutes on each side. This limited recording time remained a significant constraint for magnetic tape recorders until the introduction of longer 7 1/2 and 15 ips tape machines later in the decade.The AEG Magnetophon 21 was designed primarily for professional use in broadcasting and recording studios, and it quickly revolutionized the audio recording industry. Many famous recordings were made on Magnetophon 21s, including Ludwig van Beethoven's Ninth Symphony by the Berlin Philharmonic Orchestra, conducted by Herbert von Karajan.The Magnetophon 21 also served as a significant technology transfer from Germany into the Eastern Bloc in the wake of World War II. The same technology was used to produce tape recorders in Soviet factories, providing a major boost to Soviet audio technology.All in all, the AEG Magnetophon 21 was a highly influential device in the history of audio technology, paving the way for the magnetic tape recorder's integration into music, radio, and film industries. It allowed for higher-quality, more nearly perfect recordings and broadened the scope of musical expression through improved editing and sound manipulation.The Magnetophon 21's impact and legacy can still be felt in modern audio technology, including digital audio recording, where the concepts of magnetic tape recording, audio editing, and playback are still essential components.



  • Track system: 1-track, single channel, monaural system
  • Equalization: NAB, CCIR, AES, DIN
  • Heads:
  • Motor: 1 x capstan, 2 x reel
  • Reel size: up to 12.5 inch
  • Tape speed: 3 3⁄4   7 1⁄2   15   30 ips
  • Wow and Flutter: 0.04%  (30 ips)
  • Frequency Response: 30Hz to 20kHz  (30 ips)
  • Signal to Noise Ratio: 79dB
  • Distortion: 0.5%
  • Crosstalk: 50dB
  • Analogue Inputs:
  • Analogue Outputs:
  • Dimensions: 277 x 483 x 525 mm
  • Weight: 45 kg
  • Year:
  • Price:

AEG Magnetophon 21 (M21-1)

AEG Magnetophon 21 (M21-1)

AEG Magnetophon 21 (M21-1)

AEG Magnetophon 21 (M21-1)



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