Acoustic Image Ten 2 - Manual (Page 4)

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will find the phase reverse switch to come in handy. Feedback resulting from the use
of a mic can be reduced by inverting the phase in the channel in which the mic is
input. Phase related interactions between a pickup and a mic or two pickups can be
cleared up by reversing the phase of one of the channels and not the other. You
should experiment with the phase reversal switch in each channel to see if the effect
is one that you like.
Effects Loop
Direct Out
Mute Switch
If you are not getting any sound out of the amp, check to
make sure that the mute switch is off.
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 Ten2 combo, 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).
With the switch in either the pre or 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
out--reducing noise should a ground loop create hum when the unit is
connected to a mixing board.
A switch is provided to allow you to mute the output of the amplifier without
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. The mute switch has a red button on it to remind you that it is an
important switch.
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Signal Flow Diagram for Ten2
Ten2 Control Panel
PRE EQ OUT
BUFFER
INPUT BUFFERS
INPUT BUFFERS
OFF ON
-10 dB MIC
ATTEN
ON OFF
-10 dB MIC
ATTEN
FILTER
OFF
CUT
FILTER
OFF
CUT
180
PHASE INV
OFF
180
PHASE INV
OFF
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