ADDAC714 is a dual channel soft clipping module.
Diode based passive clipping acts as a “brick wall” limiter
with a fixed knee given by the inherent diode physics. A
passive RC low pass circuit adds a 3.3KHz -3db low pass
filter which sculpts the overall tone while also adding
further character to the effect.
At the top an On/Off [BYPASS] switch routes the signal
into the Effect (Up: Active) or to the bottom output gain
stage (Down: Bypassed).
The ammount of clipping is set by the [GAIN] control,
it mostly works as a threshold control for how much
clipping will be applied.
As more clipping is applied the signal’s amplitude will
also decrease, to compensate for this we set up a gain
compensation stage to keep the output amplitude
balanced across the Gain range.
Symmetry chooses between bipolar clipping or positive
clipping, this relates to the harmonics generated, bipolar
for odd and even harmonics (up position) and unipolar for
odd harmonics only (down position).
At the second stage, an opamp based x2 output gain
with a clipping led, which monitors the clipping at the
output, and an [Output] control to set the output volume.
Having the top and middle gain stages provides flexibili-
ty allowing the user to completelly distort the signal on
the top stage and tame it’s output level with the second
stage.
At the bottom, Input jacks for both channels (Left input is
normalled into Right input) and output jacks
This module will also be available as a full DIY kit..
Tech Specs:
6HP
4 cm deep
40mA +12V
40mA -12V
ADDAC714 VINTAGE CLIPPER
USER’S GUIDE
December.2022
Revision.01
Welcome to:
page 2
ADDAC SYSTEM
DESCRIPTION
