Acoustic Image + Models - Manual (Page 5)

5
Signal Flow Diagram
(Clarus+ version shown,
Clarus 1 is ch 1 only with
notch/hp filter in place of
low cut and phase reverse
and no effects or
headphone amp)
Clarus+ Control Panel
Input
Level Bass Mid Treble Level
Input
Level Bass Mid Treble Level
Channel 1
Channel 2 Send
Return
Freq
Direct Out
Master
Power
Level Effects
Phantom
Phantom
Hall
Room
Plate
Delay Ambient
Chorus
Flange
Off On
Off On
Off On
Low Cut
Send
Return
Ch 1
Ch 2
Post EQ Mute
Ch 2 Ground
lift
Off On
30
60
400
Effects
Loop
Effects Loop
30 400
60
Phase Inv
Freq
Low Cut
Phase Inv Off On
Off On
Mic
Atten
Mic
Atten
BYP
FX
FX
BYP
CH 2
SWITCH FX
CH 1
SWITCH FX
CH 2
RETURN FX RTN
LEVEL
FX HEADPHONE
OUTPUT
H/P
AMP
CH 1
RETURN FX
RTN
LEVEL
FX
6
on/off switch to turn on the filter. Start with the control fully counterclockwise
and gradually turn it clockwise until the desired effect is achieved. Experiment
with the position of the control to give you the sound you like best.
The phase reverse switch is used to reduce feedback and to control phase
interactions between the two channels. If you are using two pickups or a mic
and a pickup, you will find the phase reverse switch to come in handy. Mic
feedback can be reduced by reversing the phase of the signal. Phase related
interactions between a mic and a pickup or two pickups can be cleared up by
reversing the phase of one of the channels. You should experiment with the
phase reverse switch to see if the effect is one that you like.
Acoustic Image preamps have output (“Send”) and input (“Return”) capability
in each channel to allow you to use effects boxes. The send output is affected
by the input volume and tone controls and can also be used as a preamp output
for driving other power amplifiers. The Return input can be used to directly
connect an external preamp to the unit’s power amp. The effects level control in
each channel controls the volume of the returned (“wet”) signal relative to the
original (“dry”) signal. Because the effects loop is a parallel type, plugging
something into the send output does not interrupt the signal path. So, a tuner
can be plugged into the send output without affecting the signal going through
the amp. When the effects loops are not used, the level controls should be set
at zero.
The return input can also be used as an auxiliary input for connecting other line
level signals such as a CD player.
An XLR jack is provided for a Direct Out connection that allows the system’s
output to be fed to mixing boards of house PA systems or recording studios. As
a result, the instrument amplified by the unit can be recorded or further
amplified by the house PA system. In the Clarus+ amp, the Direct Out signal is
the combined output of the two channels. A switch is provided to allow you to
select whether the output from the Direct Out jack is affected by the tone
controls (post EQ) or not (pre EQ).
The input level control affects the level of the Direct Out signal, the master level
does not. This allows independent adjustment of the “stage” volume (the
volume coming from the amp and speaker on stage) and the “house” volume
(the volume in the house PA system) when the unit is used as a stage monitor.
Once the level has been set for the house, if more volume is needed on stage,
the master level can be increased. This will increase the stage volume but not
the volume in the house PA.
A ground lift switch is available to “lift” the ground from the output of the direct
out--reducing noise should a ground loop create hum when the unit is
connected to a mixing board.
Effects Loop
Direct Out