GTX212
GTX120
Owner’s Manual
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GTX120/212 Guitar Amplifier with
DSP & Channel Tracking
The Digital Signal Processor:
Crate’s Digital Signal Processing offers 16 exciting digital effects, accessible through the DSP
Mode control. The effects are described below.
1
small room reverb
medium room reverb
large room reverb
concert hall reverb
short slapback w/small room reverb
medium delay w/plate reverb
long delay w/large room reverb
slow deep flange w/reverb
flange w/reverb & delay
slow chorus w/reverb
chorus w/reverb & delay
rotating speaker
2
3
4
5
6
7
8
9
10
11
12
13
octave down
Use the DSP Mode control to access
any of the 16 built-in digital effects.
Use the Level control to mix in the
desired amount of each effect.
14 touch wah
15
16
inverse wah
doubler
Channel Tracking:
Your Crate GTX120/212 gives you the power of Channel Tracking! Once you select a DSP set-
ting for each channel, Channel Tracking recalls those DSP settings automatically – without chang-
ing the DSP controls! For example:
• Select the Clean channel. Set the DSP Mode to “8” (slow deep flange w/reverb)
• Select the Rhythm/Solo channel, Gain 1. Set the DSP Mode to “10” (slow chorus w/reverb)
(the setting for the Clean channel is now saved to memory)
• Select the Rhythm/Solo channel, Gain 2. Set the DSP Mode to “14” (touch wah)
(the setting for the Rhythm/Solo channel, Gain 1 is now saved to memory)
• Reselect the Clean channel (the setting for the Rhythm/Solo channel, Gain 2 is now saved to memory)
Now when you go back to the Clean channel, even though the DSP Mode was last set to “14”
(touch wah), Channel Tracking automatically recalls the last setting for the Clean channel – in this
example, “8” (slow flange). Change to the Rhythm/Solo channel, Gain 1, and “10” (chorus) is
recalled. Change to the Rhythm/Solo channel, Gain 2, and “14” (touch wah) is recalled. That’s the
power of Channel Tracking!
(Note: Even when the power is turned off, Channel Tracking still retains the settings – until you change them!)
3
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GTX120/212 Guitar Amplifier with
DSP & Channel Tracking
The Front Panel:
1
2
3
4
5
6
7
8
9
10
1: INPUT: Use this 1/4” jack to connect your guitar to the amplifier by means of a shielded instrument cable.
RHYTHM/SOLO CHANNEL: A high gain channel giving you sounds from a slight edge to serious overdrive.
2: RHYTHM GAIN 1: Use this control to adjust the amount of light distortion for the Rhythm/Solo channel. Gain
1 produces less intense distortion than Gain 2 (#3) and is active when the Rhythm/Solo Gain switch (#5) is in
the out position.
3: SOLO GAIN 2: Use this control to adjust the amount of heavy distortion for the Rhythm/Solo channel. Gain
2 produces more intense distortion than Gain 1 (#2) and is active when the Rhythm/Solo Gain switch (#5) is
depressed.
4: SHAPE: Use this control to “dial in” the tone for the Rhythm/Solo channel when Gain 2 is selected. Rotating
the control counterclockwise enhances the mid frequencies, while rotating the control clockwise enhances the
low and high frequencies.
5: RHYTHM/SOLO SWITCH: Use this switch to select which gain control is active for the Rhythm/Solo chan-
nel. With the switch in the out position, Gain 1 (Rhythm) is selected. When the switch is depressed, Gain 2
(Solo) is selected.
6: LOW: Use this control to adjust the low frequency level of the Rhythm/Solo channel.
7: HIGH: Use this control to adjust the high frequency level of the Rhythm/Solo channel.
8: LEVEL: Use this control to adjust the output level of the Rhythm/Solo channel.
9: CHANNEL SWITCH: Use this switch to select the desired channel. With the switch in the out position, the
Clean channel is selected. When the switch is depressed, the Rhythm/Solo channel is selected.
CLEAN CHANNEL: A normal gain channel designed to give you sounds from crystal clear to medium distortion.
10: LEVEL: Use this control to adjust the output level of the Clean channel.
11: LOW: Use this control to adjust the low frequency level of the Clean channel.
12: MID: Use this control to adjust the midrange frequency level of the Clean channel.
13: HIGH: Use this control to adjust the high frequency level of the Clean channel.
14: DSP LEVEL: Use this control to adjust the amount of digital effect: in its fully counterclockwise posi-
tion the signal will be “dry” (without any effect). As you rotate the control clockwise the amount of effect
increases.
15: DSP MODE: Use this control to select one of the 16 built-in digital effects. The effects are shown on
page 3.
4
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GTX120/212 Guitar Amplifier with
DSP & Channel Tracking
11
12
13
14
15
16
17
18
16: INSERT: Use this jack to connect an external effects device to the amplifier. Use a stereo 1/4” male Y con-
nector: ring = send, tip = return, sleeve = ground. (Refer to the illustration at the bottom of page 5.)
17: EXTERNAL SPEAKER: Use this jack to connect an external speaker to the amplifier. This jack is wired in
series with the internal speaker(s) which remain active when an external speaker is connected.
18: POWER: Use this switch to turn the amplifier on (top of the switch depressed) and off (bottom of the
switch depressed). The switch is illuminated when the amplifier is on.
19: AC LINE CORD (rear panel, not shown): This grounded power cord is to be plugged into a grounded
power outlet, wired to current electrical codes and compatible with the voltage, power, and frequency require-
ments stated on the rear panel. Do not attempt to defeat the safety ground connection.
20: FUSE (rear panel, not shown): The fuse protects the amplifier from damages caused by a faulty AC
power source and/or other problems. If the fuse opens, replace it ONLY with the same size and type. If fuses
continue to fail, check the AC source – if the source is okay, contact your Crate dealer for service information.
21: CHANNEL SELECT / GAIN FOOTSWITCH JACK (rear panel, not shown): Use this jack to connect the 1/4”
stereo plug on the footswitch cable to the three-button footswitch (supplied). This allows you to remotely switch
between the Clean and Rhythm/Solo channels and between Rhythm Gain 1 and Solo Gain 2 of the Rhythm/Solo
channel.
22: REVERB FOOTSWITCH JACK (rear panel, not shown): Use this jack to connect the 1/4” mono plug on the
footswitch cable to the three-button footswitch (supplied). This allows you to remotely turn the DSP function on and
off.
Stereo-to-mono Y-cord:
Y-adapter and 2 cables:
CONNECTING TO THE INSERT JACK:
TIP
RING
SLEEVE
RETURN
TIP
to Insert
jack
to Insert
jack
SEND
RING
GROUND
SLEEVE
The Insert jack (#16) allows you
to patch an external effects
(STP201, 3'
STP202, 6'
STP203, 9')
(YPP117)
device into the amplifier 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 two 1/4” mono signal cables
to connect the effect as shown in
the adjacent illustration.
(1/4"-TO-1/4"
MONO CABLES)
to
to
effect
"IN"
to
to
effect
"IN"
effect
"OUT"
jack
effect
"OUT"
jack
jack
jack
5
External Effect
External Effect
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GTX120/212 Guitar Amplifier with
DSP & Channel Tracking
Suggested Settings:
"Sweet 'n Clean"
"Just a 'Lil Nasty"
"Pol
"Octave Down 'n Dirty"
"Wah Full H
"Mean & Obscene"
IN
6
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GTX120/212 Guitar Amplifier with
DSP & Channel Tracking
System Block Diagram:
CLEAN
CHANNEL
CHANNEL
BUFFER
INPUT
SELECT
LEVEL LOW MID HIGH
FLEX WAVE
STAGE
EQ
RHYTHM/SOLO
CHANNEL
SHAPE
ACTIVE
GAIN 2
LOW HIGH LEVEL
GAIN 1
SHAPE
MIX
AMP
DSP
INSERT
LEVEL
POWER
AMP
SPEAKER
MODE
DAMPING
CIRCUIT
EXT.
SPEAKER
7
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GTX120/212 Guitar Amplifier with
DSP & Channel Tracking
GTX120/212 TECHNICAL SPECIFICATIONS:
Output Power Rating
120W RMS @ 5% THD, 4Ω, 120 VAC
Speaker Size and Rating
GTX120
GTX212
(1) Custom Design 12”, 4Ω
(2) Custom Design 12”, 8Ω
Input Impedance
Total System Gain
470kΩ
Overdrive Ch
Clean Ch
Gain 1: 88dB, all controls @10; Gain 2: 110dB
58dB, all controls @10
Maximum Input Signal Accepted
7 volts peak-to-peak
Rhythm/Solo 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
Power Requirements
Size and Weight
120 VAC, 60Hz, 95VA; 100VAC, 50/60Hz, 95VA;
230VAC, 50Hz, 95VA
GTX120
GTX212
17-1/2” H x 20” W x 11” D, 34 lbs.
21” H x 26.5” W x 11” D, 50 lbs.
The GTX120/212 is covered with a durable charcoal gray Tolex material: wipe it clean with a lint-free cloth.
Never spray cleaning agents onto the cabinet. Avoid abrasive cleansers which would damage the finish.
Crate continually develops new products, as well as improves existing ones. For this reason, the specifications
and information in this manual are subject to change without notice.
Declaration Of Conformity
#34, Effective 01-01-2001
Manufacturer’s Name:
Production Facility:
Production Facility:
Shipping Facility:
Office Facility:
SLM Electronics
11880 Borman Drive, St. Louis, MO 63146, USA
700 Hwy 202 W, Yellville, AR 72687, USA
1400 Ferguson Ave., St. Louis, MO 63133, USA
1400 Ferguson Ave., St. Louis, MO 63133, USA
Product Type:
Audio Amplifier
Complies with Standards:
LVD:
92/31/EEC, 93/68/EEC, & 73/23/EWG
EN60065
EN55013, EN55020, EN55022, EN61000-3-2,
& EN61000-3-3
Safety:
EMC:
Supplementary information provided by:
SLM Electronics - R & D Engineering
1901 Congressional Drive, St Louis, MO 63146, USA
Tel.: 314-569-0141, Fax: 314-569-0175
@2002 SLM Electronics, a division of St. Louis Music, Inc • 1400 Ferguson Avenue • St. Louis, MO 63133
47-476-07 • 04/02
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