AEG Magnetophon K 7 specifications

The K7 device is a pre-production device. This device combines two essential development steps:

The tape is properly pre-magnetized:

The two developers Walter Weber and Hans-Joachim von Braun müh discovered the high-frequency pre-magnetization by chance. As a result, the band noise is significantly reduced and the distortion factor is also improved. As a result, recordings in very good quality for the time were now possible.

This device had a special stereo-capable sound head, a two-track sound head.

With the help of two microphones, stereo recordings were now possible for the first time. For this purpose, microphones of the Neumann brand were used.

The quality of these recordings was indistinguishable from live broadcasts when they were broadcast on the radio (these devices were studio devices). There are very few preserved recordings, below is a link to a recording on YouTube.

Tech nical data:

Picture on www.cdvandt.org :

And a Youtube link:

https://www.youtube.com/watch?app=desktop& ;v=aU6yv0QSPAo