In the 70's this modular audio system of using 'cassettes' to construct consoles for recording and broadcast studios was the standard. As with the earlier broadcast consoles, recording consoles were assembled from a collection of separate, standardized modules. At that time manufactureres such as Neumann, Telefunken, Danner, Tonografie Apparatebau and Maihak were some of the main manufactureres of console systems in Germany.
In 1978 when adt-audio started making consoles, we also adopted the concept of a modular audio system to produce our line of custom build consoles. Between 1978 and 1984 we produced more than 70 consoles using this method. Consoles were manufactured for both broadcast and music production, and all adhered to the strict rules and regulation listed above. Many of those consoles are in still in service today.
The picture above shows an A1500b, 32 channel console with dual faders, 24 bus routing system, 3 stereo sub groups and stereo main master, 4 aux sends and stereo cue send, 4 stereo return inputs, fully parametric 4-band EQ's, 128 mm Penny & Giles faders with build in TT patch bay. The console was build for IPA Radio Luxemburg in 1980.
The picture below shows an A1500, 28 channel console with inline structure, 20 mono input channels with fully parametric 4-band EQ, adjustable high-pass filter, 4 aux sends and stereo cue send with 24 bus routing, 3 stereo sub groups and stereo main master with 4 return inputs. The console was made in 1978 for a music recording studio in Germany.
Technology
In the early days of the audio console, they were typically manufactured for, and used by Radio and Television stations. Consoles were for the most part custom built using a system of cassette processing modules. Because they were being used mainly in radio and television operations, observance of the quality standards set by the German National Radio and Television Network was obligatory. These standards were in fact a set of written rules that laid out stringent guidlines covering every aspect of the sonic performance of the console. The rules covered areas such as; signal to noise ratio, crosstalk between channels, output and input common mode rejection ratio, electrical shielding, etc.
These rules were further strengthened by the European-wide introduction of the CE directives. The rules demand consoles with the highest sonic quality, maximum reliability, a high level of failure security and an extremly long lifespan, without cost considerations.
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