Acoustic Image Acoustic Image Stereo Amplifier Panduan Pemilik - Halaman 5

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Halaman Cetak
Ch 2
effects
send
Ch 2
on/off
Effects
Ch 2
Effects
level
effects
switch
H R P D AC F
er
Prog switch
h
Freq
Ch 1 effects
switch
Ch 1
effects
send
Speaker
Out 1
(internal
connection on
combo amps)
Speaker
Out 2
Channel 2
Phantom
Level
Bass
Mid
Treble
Input
Phantom
Channel 1
Level
Bass
Mid
Treble
Input
Coda R and Corus Control Panel
Return
level
Ch 2
effects
return
I/O buss
Master
Mute
level
Direct
Ground
Switch
out
Pre/Post
Switch
Ch 1
effects
return
Return
level
Power amp
Filter
Effects
Send
Notch Cut
Ch 2
Loop
Ambient
70
Delay
Chorus
Plate
Flange
Off On
Room
Hall
30
800
Level
Freq
Off
On
Ch 1
Effects
Return
Effects
Send
Notch Cut
Filter
Post
Mute
Loop
EQ
70
Off On
30
800
Level
Freq
Master
Off
On
Ground
Ch 2
Return
lift
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remove a given feedback frequency to reduce feedback "howl". The low cut
filter is used to reduce the bass output in cases where room location or
instrument/pickup combination results in "boomy" sound. To use either, push
the on/off switch to turn on the filter circuit then select the filter type using the
notch/cut switch. 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.

Effects Loop

Acoustic Image preamps have output ("Send") and input ("Return") capability
lift
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.

Direct Out

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 Coda R and Corus combos, 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 input level and tone controls (post EQ) or not (pre EQ).
With the switch in the post EQ position, 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 combo amp)
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
Power
Level
out--reducing noise should a ground loop create hum when the unit is
connected to a mixing board.

Mute Switch

A switch is provided to allow you to mute the output of the amplifier without
Direct Out
having to turn the amp off. This will allow you to tune your instrument on stage
without being heard. The amp output and direct out signals are both muted by
the switch.
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