ACOUSTIC X
AMPS
9
3.1. MIC INPUT (XLR): This input is electronically balanced for XLR-type connections. The channel is
designed for any kind of microphone source e.g. dynamic and condenser mics.
3.2. P24: Phantom power supplies the XLR connector with 24 VDC for powering condenser
microphones. Most condenser (and dynamic) mics, and some preamps, can be safely phantom
powered. In certain cases however, phantom power can cause damage. This tends to happen with
unbalanced microphones, preamps, or stompboxes that have been modified for balanced XLR use.
If in doubt, please contact the manufacturer to check the compatibility of your audio device before
using the amplifier.
3.3. GAIN: This variable gain preamplifier adjusts the sensitivity level to ensure the best possible
processing of the signal through the channel. It is important that this input level is set and optimized
in the best way to achieve the cleanest sound possible.
3.4. OVERLOAD: This LED (when lit) indicates that the level of the input signal is too high and it
might therefore introduce distortion. (See “Practical tip” 1.5.)
3.5. HIGH, MID, LOW (EQ): These controls are for high, mid and low frequency regulation. Offering
cut and boost of ±15 dB, they allow a wide range of tonal variations to be explored. Parametric
MID regulation offers the possibility to cut or boost a frequency range between 300 Hz and 3.3
kHz. When the controls are positioned centrally there is no cut or boost of the selected frequency
band.
3.6. REV/AUX: This rotary control sets the level of the digital reverb on the channel and the level
of the signal to the AUX OUT output. If you want to bypass the onboard reverb, you can set the
REVERB Master control to zero and use the REV/AUX to control the amount of signal you want to
send to an external effect unit, or to an additional monitor.
3.7. VOLUME: This rotary control regulates the channel volume.
4.1. STEREO IN: 1/8” mini jack stereo input for PC, MP3 and other electronic devices. Volume
depends on the MASTER volume regulation.
Class–A High Voltage Preamp / No Integrated Circuits / No NFB
1
2
5
3
4
INSTRUMENT IN
MIC IN
P24
GAIN
LOW
GAIN
RESON
LOW
MID
HIGH
REV / AUX
VOLUME
INSERT
LINE OUT
10V
Ø
GAIN
WARM
LOW
PARAMETRIC MIDS
flat
300 Hz
300 Hz
3.3 KHz
3.3 KHz
HIGH
HIGH
REV / AUX
REV / AUX
VOLUME
AUX OUT
VOLUME
VOLUME
L
R
STEREO IN
MASTER
REVERB
master
DECAY
D.I. OUT
SWISS
MADE
240 Hz
150 Hz
700 Hz
700 Hz
gain
gain
PARAMETRIC MIDS
JAM X
GN
D L
IFT
24
0
WA
TT
AC
OU
ST
IC
AM
PL
IF
IE
R
L
E
N
N
A
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5
AC
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IC
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SE
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13
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WA
TT
P
OW
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SU
MP
TI
ON
X
SE
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ES
P24
INSTRUMENT IN
MIC IN
10V
CA
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K O
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DO
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N
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3.1
3.2
3.3
3.4
3.5
3.6
3.7
4.1
Class–A High Voltage Preamp / No Integrated Circuits / No NFB
1
2
5
3
4
INSTRUMENT IN
MIC IN
P24
GAIN
LOW
GAIN
RESON
LOW
MID
HIGH
REV / AUX
VOLUME
INSERT
LINE OUT
10V
Ø
GAIN
WARM
LOW
PARAMETRIC MIDS
flat
300 Hz
300 Hz
3.3 KHz
3.3 KHz
HIGH
HIGH
REV / AUX
REV / AUX
VOLUME
AUX OUT
VOLUME
VOLUME
L
R
STEREO IN
MASTER
REVERB
master
DECAY
D.I. OUT
SWISS
MADE
240 Hz
150 Hz
700 Hz
700 Hz
gain
gain
PARAMETRIC MIDS
JAM X
GN
D L
IFT
24
0
WA
TT
AC
OU
ST
IC
AM
PL
IF
IE
R
L
E
N
N
A
H
C
5
AC
OU
ST
IC
AM
PL
IF
IE
R
SE
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AL
N
UM
BE
R
W
W
W.
SC
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OM
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+
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W
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S
S
JA
M X
13
0
WA
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P
OW
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ON
SU
MP
TI
ON
X
SE
RI
ES
P24
INSTRUMENT IN
MIC IN
10V
CA
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N
RIS
K O
F E
LEC
TRI
C
SHO
CK
DO
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OPE
N
TO
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CE
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K O
F F
IRE
,
DO
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EXP
OSE
TH
IS
EQ
UIP
MEN
T T
O R
AIN
OR
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IST
URE
. F
OR
CO
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UED
PR
OTE
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5.1. FX RETURN: Left and Right unbalanced jack socket for the return of external effects. This can
also be used as a 5th input channel to accommodate an extra line level device.
5.2. FX RETURN VOL: This rotary control regulates the channel volume.
6.1. DI OUT: A general XLR balanced output for connecting to external systems. The output volume
does not depend on the regulation of the MASTER control, but is affected by changes in individual
channel volume.
6.2. DI OUT VOL: This rotary control sets the output level on the DI OUT.
6.3. LINE OUT: This unbalanced jack socket enables connection to external systems. The output
volume depends on the regulation of the MASTER control.
6.4. INSERT: This stereo jack socket enables the connection of an external device (compressor,
equalizer, etc.) in series to all the outputs.
6.5. POWER LED: Indicates when the amplifier is switched ON.
6.6. MUTE: This cuts the audio on the Master.
6.7. LOW CUT: When active, this filter cuts all frequencies below 180 Hz - ideal if you play an
instrument that generates aggressive low frequencies. It enables you to connect a subwoofer, and
prevent unwanted vibration and possible damage to your JAM X.
6.8. MASTER: Controls the overall system volume.
6.9. REVERB Master: This control regulates the general level of the digital reverb, common to
all channels. The amount of effect can be individually regulated for each single channel via the
dedicated controls.
6.10. DECAY: This control regulates the length of the reverb (time of the reverb from attack to
silence).
6.11. AUX OUT: This additional mono jack output enables connection to an external effect or monitor.
6.11
6.10
6.9
6.8
6.7
6.6
6.5
6.4
6.3
6.2
6.1
5.1
5.2
CONTROLS
