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Chameleon Labs LLC, Woodinville, WA USA www.chameleonlabs.com 7603 User’s Manual
10. Phase Reversal
This allows you to change the signal phase by
180 degrees. This is useful when comparing
the sound of your microphone or instrument
within the mix. Imagine if a note is played,
and the speaker cone is moving out. With
the phase reversed, the speaker cone would
instead be moving in at that moment.
11. High-Pass filter
This detented selector switch allows you to
select the frequency of the high pass filter.
Signals below this frequency are attenuated
with an 12 dB per octave slope. This filter is
useful for removing low-frequency effects
such as mic-handling and stage noise, rumble
etc. The crossover frequency can be selected
from OFF, 40, 80, 160, and 320 Hz. In the OFF
position, the high-pass filter is bypassed and
the low-frequencies are not affected.
12. Low EQ frequency
This detented selector switch allows you to
select the frequency of the low EQ shelving
filter. Signals below this frequency are
boosted or attenuated depending on the
setting of the Low EQ amplitude control (13).
The available frequency selections are 35, 60,
110, and 220 Hz. In the OFF position, the Low
EQ is bypassed.
13. Low EQ amplitude
This continuously-variable control allows
you to boost or attenuate the level at the
frequency set by the Low EQ frequency
control (12). The level of adjustment is from
-15 to +15 dB
14. Mid EQ frequency
This detented selector switch allows you to
select the frequency of the Mid EQ peaking
filter. Signals around this frequency are
boosted or attenuated depending on the
setting of the Mid EQ amplitude control (15).
The available frequency selections are 350,
700, 1.6k, 3.2k, 4.8k, and 7.2 kHz. In the OFF
position, the Mid EQ is bypassed.
15. Mid EQ amplitude
This continuously-variable control allows
you to boost or attenuate the level at the
frequency set by the Mid EQ frequency control
(14). The level of adjustment is from -15 to
+15 dB
16. High EQ frequency
This detented selector switch allows you to
select the frequency of the High EQ shelving
filter. Signals above this frequency are
boosted or attenuated depending on the
setting of the High EQ amplitude control
(17). The available frequency selections are
3.4k, 4.9k, 7k, 12k, and 16 kHz. In the OFF
position, the High EQ is bypassed.
17. High EQ amplitude
This continuously-variable control allows
you to boost or attenuate the level at the
frequency set by the High EQ frequency
control (16). The level of adjustment is from
-15 to +15 dB
18. Output Gain
This continuously-variable control allows
you to adjust the level of the output from
-60 dB to +20 dB. Acting as a console fader,
this control is placed after the gain stage
and before the output stage. This allows
for trimming of the input signal between
the 5 dB steps of the input switch, as well
as allowing the input to be intentionally
overdriven. The normal position for this
control is wide open.
19. Ovr LED
This LED will light when the output levels are
overloaded. Carefully adjust the Output Gain
control (18) so this LED does not come on.
during louder passages.
20. Meter
This precision VU meter shows either the
input or output levels, depending upon the
position of the input/output switch (23). Use
the dB range switch (21) to select the meter
sensitivity.
21. dB Range
Use this to select the dB range of the meter
from 0 dB or -20 dB.
22. Power Switch
When all your connections to and from the
preamplifier have been made, use this switch
to turn the unit on or off.
23. VU Meter switch
Use this to select if the meter shows the input
signal level or the output signal level.
