GFX-1200H
GUITAR AMPLIFIER WITH
DIGITAL SIGNAL PROCESSING
OWNER’S MANUAL
Congratulations!
You are now the proud owner of the Crate GFX-1200H guitar amplifier. This rugged
amp head combines outstanding features with serious clean and distorted sounds. An
easy to operate DSP section lets you dial in a variety of digital effects such as delay,
flange, chorus and reverb – with separate level control. Channel selection, Crate’s
exclusive Shape circuit, and DSP 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 GFX-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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GFX-1200H Amplifier
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1: INPUT: Connect your guitar here using a shield-
ed instrument cable.
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 create a wide variety
of sounds.
OVERDRIVE CHANNEL: A high gain channel giv-
ing you sounds from a slight edge to serious over-
drive.
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 (#22) overrides this switch. The adja-
cent LEDs indicate which channel is selected.
2: GAIN 1: When active, sets the amount of com-
pression and distortion from the amplifier. At far
left, the sound will have a thick compressed quali-
ty. 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.
CLEAN CHANNEL: A normal gain channel
designed to give you crystal clear sounds.
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.
3: GAIN 2: When active, sets the amount of com-
pression and distortion from the amplifier. At far
left, the sound will have a thick compressed quali-
ty. 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.
11: 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
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 fre-
quencies. (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.
13: HIGH: Adjusts the high frequency output level:
to the left reduces the high frequency output; to the
right increases it. This control allows a range of
28dB at 10kHz.
5: GAIN SELECT: Switches between Gain 1 (out)
and Gain 2 (in). A footswitch (#22) overrides this
switch.
14: DSP LEVEL: Adjust the amount of digital sig-
nal processing with this control: in the full-left posi-
tion the output signal is “dry” (no effect); rotating
the control to the right increases the amount of
effect. The DSP can be turned on and off with a
footswitch (#23).
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.
7: HIGH: Adjusts the high frequency output level:
to the left reduces the high frequency output, to the
right increases it. This control allows a range of
10dB at 10kHz.
15: DSP MODE: Select the type of digital effect(s)
desired with this control. Each category and its
central location is called out (delay, flange, etc.) by
the markings around the control; there are two
variations per effect, as follows:
8: LEVEL: Sets the output volume level from the
Overdrive Channel: in the far-left position there is
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GFX-1200H Amplifier
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• Slapback delay
• Long delay w/regeneration
• Light Flange
• Heavy Flange
• Slow Chorus
22: 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.
• Fast Chorus
23: DSP FOOTSWITCH JACK (rear panel, not
shown): Connect the mono 1/4” plug of the sup-
plied three-button footswitch here for remote con-
trol of the DSP on and off.
• Chorus w/small room reverb
• Chorus w/large room reverb
• Small room reverb
• Large room reverb
16: 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 illustra-
tion on the panel to the right for more information.
Connecting to the Insert jack:
The Insert jack (#16) lets you patch external effects
into the amplifier just prior to its power amp stage.
Use Crate’s CYC6MS stereo-to-mono Y-cord or an
adapter such as Crate’s CA11Y and 2 1/4” mono
signal cables to connect to the effect as shown
below.
17: POWER ON LED: Lights when the amplifier is
turned on.
18: POWER SWITCH: Turns the amplifier ON in
the up position, off in the down position.
Stereo-to-mono Y-cord:
Y-adapter and 2 cables:
19. POWER CORD (rear panel, not shown): Your
GFX-1200H is equipped with a heavy-duty ground-
ed three-wire power cord. Be sure this cord is prop-
erly plugged into a safely wired grounded 120 volt,
60Hz AC power outlet before use. (If your GFX-
1200H was purchased outside the United States,
refer to the rear panel for power ratings.) For your
safety, never attempt to defeat the ground connec-
tion on this cord.
TIP
RING
SLEEVE
RETURN
TIP
to Insert
jack
to Insert
jack
SEND
RING
GROUND
SLEEVE
(STP201, 3'
STP202, 6'
STP203, 9')
(YPP117)
20: SPEAKER JACKS (rear panel, not shown):
Use these 1/4” output jacks to connect the amplifi-
er to your speaker cabinet(s). Use heavy gauge
speaker cables. The GFX-1200H can operate into
speaker loads as low as 4 ohms.
(1/4"-TO-1/4"
MONO SHIELDED
CABLES)
to
21: 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 infor-
mation.
to
to
effect
"IN"
to
effect
"IN"
effect
"OUT"
jack
effect
"OUT"
jack
jack
jack
External Effect
External Effect
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GFX-1200H Amplifier
GFX-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 GFX-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
VORSICHT: ZUR MINIMIERUNG ELEKTRISCHER SCHLAGGEFAHR NICHT
DEN DECKEL ABENHMEN. INTERNE TEILE KONNEN NICHT VOM
BENUTZER GEWARTET WERDEN. DIE WARTUNG IS QUALIFIZIERTEM
WARTUNGSPERSONAL ZU UBERLASSEN.
ENLEVER LE COUVERCLE. AUCUNE PIECE INTERNE N'EST REPRABLE
NO USER-SERVICEABLE PARTS INSIDE.
PAR L'UTILISATEUR. POUR TOUTE REPARATION, S'ADRESSER
TECHNICIEN QUALIFIE.
A
UN
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.
©1998 SLM ELECTRONICS, A DIVISION OF ST. LOUIS MUSIC, 1400 FERGUSON, ST. LOUIS, MO. 63133
P/N 47-477-03 • 08/98
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