GX-1200H
GUITAR AMPLIFIER
OWNER’S MANUAL
Congratulations!
You are now the proud owner of the Crate GX-1200H guitar amplifier. This rugged
amp head combines outstanding features with serious clean and distorted sounds.
Channel selection, Crate’s exclusive Shape circuit, and reverb on/off are controllable by
the supplied three-button footswitch. An insert jack allows virtually noise-free connection
of your favorite effects.
Like all Crate products, your GX-1200H is Musician Made in the U.S.A., using only
the best components. Extensive testing at the hands (and ears) of skilled technicians
and musicians insures you that this amplifier is the absolute best it can be.
In order to get the most out of your new amplifier, we strongly urge you to go over
the information contained in this manual before you begin playing.
And thank you for choosing
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GX-120OH Amplifier
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1: INPUT: Connect your guitar here using a
shielded instrument cable.
8: LEVEL: Sets the output volume level from the
Overdrive Channel: in the far-left position there
is no output; turning the control to the right
increases the output. Use this control along with
the Gain and Shape controls (#2, 3 & 4) to cre-
ate a wide variety of sounds.
OVERDRIVE CHANNEL: A high gain channel
giving you sounds from a slight edge to serious
overdrive.
2: GAIN 1: When active, sets the amount of
compression and distortion from the amplifier. At
far left, the sound will have a thick compressed
quality. As you turn the control to the right the
amount of distortion increases. Gain 1 produces
less intense distortion than Gain 2 and is active
only when the Gain Select switch (#5) is out.
9: CHANNEL SELECT: When this switch is
pressed in the Overdrive Channel is engaged.
The Clean Channel is selected when this switch
is out. A footswitch (#21) overrides this switch.
The adjacent LEDs indicate which channel is
selected.
CLEAN CHANNEL: A normal gain channel
designed to give you crystal clear sounds.
3: GAIN 2: When active, sets the amount of
compression and distortion from the amplifier. At
far left, the sound will have a thick compressed
quality. As you turn the control to the right the
amount of distortion increases. Gain 2 produces
more intense distortion than Gain 1 and is active
only when the Gain Select switch (#5) is in.
10: LEVEL: Sets the output volume level from
the Clean Channel: in the far-left position there
is no output; turning the control to the right
increases the output level.
11: LOW: Adjusts the low frequency output
level: to the left reduces the low frequency out-
put; to the right increases it. This control allows
a range of 22dB at 80Hz.
4: SHAPE: Working in conjunction with the Gain
2 control, rotate the Shape control until you find
the sound you’re looking for. Turning the control
towards the left enhances the mid frequencies;
turning it to the right enhances the low and high
frequencies. (Only affects Gain 2 when active.)
12: MID: Adjusts the mid frequency output level:
to the left reduces the midrange output; turning
it to the right increases it. This control allows a
range of 14dB at 600Hz.
5: GAIN SELECT: Switches between Gain 1
(out) and Gain 2 (in). A footswitch (#21) over-
rides this switch.
13: HIGH: Adjusts the high frequency output
level: to the left reduces the high frequency out-
put; to the right increases it. This control allows
a range of 28dB at 10kHz.
6: LOW: Adjusts the low frequency output level:
to the left reduces the low frequency output; to
the right increases it. This control allows a range
of 11dB at 80Hz.
14: REVERB LEVEL: Adjust the amount of
reverberation with this control: in the full-left
position the output signal is “dry” (no reverb);
rotating the control to the right increases the
amount of reverb. Reverb can be turned on and
off with a footswitch (#22).
7: HIGH: Adjusts the high frequency output
level: to the left reduces the high frequency out-
put, to the right increases it. This control allows
a range of 10dB at 10kHz.
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GX-120OH Amplifier
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15: INSERT: Connect an external effects device
via this jack. Use a stereo 1/4” male Y-cord: ring
= send, tip = return, sleeve = ground. See the
illustration on the panel to the right for more
information
22: REVERB FOOTSWITCH JACK (rear panel,
not shown): Connect the mono 1/4” plug of the sup-
plied three-button footswitch here for remote control
of the reverb on and off.
Connecting to the Insert jack:
16: POWER ON LED: Lights when the amplifier
is turned on.
The Insert jack (#15) lets you patch external
effects into the amplifier just prior to its power
amp stage. Use Crate’s STP201, STP202 or
STP203 stereo-to-mono Y-cord or an adapter
such as Crate’s YPP117 and 2 1/4” mono signal
cables to connect to the effect as shown below.
17: POWER SWITCH: Turns the amplifier ON in
the up position, off in the down position.
18. POWER CORD (rear panel, not shown):
Your GX-1200H is equipped with a heavy-duty
grounded three-wire power cord. Be sure this
cord is properly plugged into a safely wired
grounded 120 volt, 60Hz AC power outlet before
use. (If your GX-1200H was purchased outside
the United States, refer to the rear panel for
power ratings.) For your safety, never attempt to
defeat the ground connection on this cord.
Stereo-to-mono Y-cord:
Y-adapter and 2 cables:
TIP
RETURN
TIP
to Insert
to Insert
jack
RING
SEND
RING
jack
SLEEVE
GROUND
SLEEVE
(STP201, 3'
STP202, 6'
STP203, 9')
19: SPEAKER JACKS (rear panel, not
shown): Use these 1/4” output jacks to connect
the amplifier to your speaker cabinet(s). Use
heavy gauge speaker cables. The GX-1200H
can operate into speaker loads as low as 4
ohms.
(YPP117)
20: FUSE (rear panel, not shown): Protects
the amplifier against damages caused from a
faulty AC power source or other problems. If the
fuse blows, replace it ONLY with the same size
and type fuse. If the fuse blows repeatedly
check the AC source; if it’s okay, contact your
Crate dealer for service information.
(1/4"-TO-1/4"
MONO SHIELDED
CABLES)
to
to
to
effect
"IN"
to
effect
"IN"
effect
"OUT"
jack
effect
"OUT"
jack
jack
jack
21: CHANNEL SELECT / GAIN FOOTSWITCH
JACK (rear panel, not shown): Connect the stereo
1/4” plug of the supplied three-button footswitch here
for remote control of the Channel Select and Gain
Select settings.
External Effect
External Effect
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GX-1200H Amplifier
GX-1200H TECHNICAL SPECIFICATIONS
Output Power Rating
70 watts RMS @ 5% THD 8 ohms load 120VAC
100 watts RMS @ 5% THD 4 ohms load 120VAC
Maximum Input Signal Level Accepted
Total System Gain
8 volts, peak-to-peak
Overdrive Channel: 110dB all controls @10, Gain 2; 88dB Gain 1
Clean Channel: 58dB all controls @10
Input Impedance
470k ohms
Overdrive Channel:
Low Control:
Shape Control:
High Control:
11dB Range @ 80Hz
Proprietary Circuit
10dB Range @ 10kHz
Clean Channel:
Low Control:
Mid Control:
High Control:
22dB Range @ 80Hz
14dB Range @ 600Hz
28dB Range @ 10kHz
Input Power Requirements
120 VAC, 60Hz, 230VA
100/115VAC, 50/60Hz, 230VA
230VAC, 50/60Hz, 230VA
Cabinet Size and Weight:
9-3/8” H x 19-3/4” W x 9-1/2” D, 25 lbs.
The GX-1200H is covered with a durable black Tolex material: wipe
it clean with a lint-free cloth. Never spray cleaning agents onto the
cabinet. Avoid abrasive cleansers which could damage the finish.
CAUTION
ATTENTION
VORSICHT
RISK OF ELECTRIC SHOCK
DO NOT OPEN
RISQUE D'ELECTROCUTION
NE PAS OUVRIR
ELEKTRISCHE SCHLAGGEFAHR
NICHT OFFENEN
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,
DO NOT REMOVE COVER.
ATTENTION: POUR REDUIRE D'ELECTROCUTION NE PAS
ENLEVER LE COUVERCLE. AUCUNE PIECE INTERNE N'EST REPRABLE
PAR L'UTILISATEUR. POUR TOUTE REPARATION, S'ADRESSER A UN
TECHNICIEN QUALIFIE.
VORSICHT: ZUR MINIMIERUNG ELEKTRISCHER SCHLAGGEFAHR NICHT
DEN DECKEL ABENHMEN. INTERNE TEILE KONNEN NICHT VOM
BENUTZER GEWARTET WERDEN. DIE WARTUNG IS QUALIFIZIERTEM
WARTUNGSPERSONAL ZU UBERLASSEN.
NO USER-SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
THIS EQUIPMENT HAS BEEN DESIGNED AND ENGINEERED TO PROVIDE SAFE AND RELIABLE OPERATION. IN ORDER TO PROLONG THE LIFE OF THE
UNIT AND PREVENT ACCIDENTAL DAMAGES OR INJURY, PLEASE FOLLOW THESE PRECAUTIONARY GUIDELINES:
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT OPEN CHASSIS; DO NOT DEFEAT OR REMOVE THE GROUND PIN OF THE POWER
CORD; CONNECT ONLY TO A PROPERLY GROUNDED AC POWER OUTLET.
WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.
CAUTION: NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
CAUTION: OUR AMPLIFIERS ARE CAPABLE OF PRODUCING HIGH SOUND PRESSURE LEVELS. CONTINUED EXPOSURE TO HIGH SOUND PRESSURE
LEVELS CAN CAUSE PERMANENT HEARING IMPAIRMENT OR LOSS. USER CAUTION IS ADVISED AND EAR PROTECTION IS RECOMMENDED IF UNIT IS
OPERATED AT HIGH VOLUME.
EXPLANATION OF GRAPHICAL SYMBOLS:
EXPLICACION DE SIMBOLOS GRAFICOS:
EXPLICATION DES SYMBÔLES GRAPHIQUES:
"IT IS NECESSARY FOR THE USER TO REFER TO THE INSTRUCTION MANUAL"
“ES NECESARIO QUE EL USUARIO SE REFIERA AL MANUAL DE INSTRUCCIONES.”
"REFERREZ-VOUS AU MANUAL D'UTILISATION"
"DANGEROUS VOLTAGE"
“VOLTAJE PELIGROSO”
"DANGER HAUTE TENSION"
"GEFAHLICHE SPANNUNG"
=
=
"UNBEDINGT IN DER BEDIENUNGSANLEITUNG NACHSCHLAGEN"
Crate continually develops new products, as well as improves existing ones. For this reason, the
specifications and information in this Crate manual are subject to change without notice.
©2001 SLM ELECTRONICS, A DIVISION OF ST. LOUIS MUSIC, 1400 FERGUSON, ST. LOUIS, MO. 63133
P/N 47-477-04 • 05/01
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