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System a - 100, A-199, Controls – Doepfer A-199 Spring Reverb User Manual

Page 3: Doepfer

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doepfer

System A - 100

Spring Reverb

A-199

3

3. Controls

1

Level

Attenuator 1 controls the level of the input signal fed
into socket !.

2

Feedback

Knob 2 controls the share of the reverb signal that
is fed back to the input. Feedback can be adjusted as
far as self-oscillation (as for some filter modules of
A-100, e.g. A-120/121/122/123). The self-oscillation
behaviour depends upon the properties of the spring-
system.

H

If external feedback is used this control acts as
an attenuator for the external feedback signal. In
this case the reverb output § is passed through
one or more A-100 modules and then fed back
to socket " (refer to chapter 5: user examples).

3

Emphasis

This control enables the adjustment of the accentua-
tion of middle frequencies
(around ~

2kHz, see fig.

1). This gives more “pressure” or “presence” to the
reverb effect.

Fig. 1: Effect of emphasis function

4

Mix

This control adjusts the relation between original
and reverb signal
appearing at output $.

300 Hz

1.0 kHz

10 kHz

Pay attention to the notes concerning the posi-
tion and assembly of the reverb system at the
end of this manual.

To minimize hum noise we recommend the
usage of the special A-100 power supply with
ring core transformer (A-100PSU2) instead of
the standard power supply.