Acoustic Image Series4 - Manual (Page 6)

8
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
Two Channel 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
9
Effects
Headphone Output
There is a short delay between removal of the plug and the amp
coming back on, so expect a pause before you will hear anything
from the amp after the headphone is removed.
Limiter Switch
Our high-quality effects units offer 6 program selections: 3 reverb
programs (Hall, Room and Plate), a delay, an ambient chorus and a
flanger. There are switches to select which of the two channels are
processed by the effects unit. Either channel can be connected to the
effects unit. If both switches are engaged, the selected program
appears in both channels. In the one channel preamp, only one switch
is present. A level control affects the level of the effects signal that is
mixed with the “dry” signal to control the overall effect of the selected
program. You should experiment with both the program selection and
the level control to find the sound that you prefer. When effects are not
used, the switches for both channels should be off and the level
control should be turned fully counterclockwise. Note that the flange
effect is noisy, it is normal the hear the modulation of the flanger when
no signal is present.
There is headphone output on the rear panel of the amp head. You can
plug a standard 1/4 inch stereo plug into this output to connect a
headphone for private listening. If your headphone has a 1/8th inch
plug, you can buy an adapter to allow you to use the 1/4 inch output
jack.
When you plug into the jack, the amp is muted. Sound will only be
heard through the headphones. The headphone is connected to the
output of the preamp so all of the controls on the preamp, including
effects, will affect the signal heard through the headphone. When the
headphone plug is removed from the jack, the amp will come back on.
Anytime anything is
plugged into the headphone output jack, the amp will be muted so
make sure that nothing is plugged into the jack when you want to use
the amp normally.
Under extreme playing conditions such as high volume or when
driving a low impedance speaker load, the amplifier may be pushed
beyond its limits. When that happens, you will hear high distortion and
you may even cause the overcurrent protection circuit to operate
resulting in an interruption of sound. The power amp is protected
against short circuits in its output. When the amp tries to deliver too
much output current, the overcurrent circuit will operate to prevent
damage. The result is that the power amp is turned off for a second or
two to keep it from delivering too much current. The limiter switch,
located on the rear panel of the amp head, is provided to allow the amp