Doepfer A-199 Spring Reverb Module
Spring Reverb ModuleDoepfer A-199 is a spring reverb module, which electronically simulates the reverb effect with the aid of spiral springs. Spring reverb systems have a characteristic sound behaviour based on the (inadequate) mechanical properties of the springs used: Signal delays, self-resonances, limited frequency range, acoustic resonance behaviour, sensitivity to mechanical influences such as shocks, etc. They do, however, sound very distinctive.
The A-199 uses a spring system with 3 separate springs, which makes the reverb very "thick" due to the different characteristics of the springs. The A-199 module also has some special features, which are not found in many other Spring reverb systems: As a first special feature, the H-signal can be fed back to the input at the A-199, whereby the feedback can lead to the system's self-resonance. The feedback can be provided within the module with the feedback controller, but the feedback signal can also be routed via external modules (eg VCA, filter, phaser, frequency shifter, vocoder, distortion / waveshaper, ring modulator, etc.). In this case, the pure reverb out is routed via the external module (s) and fed back to the "external feedback in" socket. This socket is designed as a switching socket, ie the internal feedback line is disconnected as soon as a plug is plugged into this socket.
As a further special feature the module has an emphasis amplifier where the middle frequency ranges (centre frequency approx. 2 kHz) can be additionally raised.
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