Crate Amplifiers Musical Instrument Amplifier GTD120 User Manual

GTD120  
212  
Three-Channel Guitar Amplifier  
with DSP and Channel Tracking  
Owner’s Manual  
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GTD120/212 Guitar Amplifier w/DSP and Channel Tracking  
Introduction  
Congratulations! You are now the proud owner of the Crate GTD120/212 three-channel guitar  
amplifier with advanced digital signal processing (DSP) and Channel Tracking. This rugged  
amplifier combines outstanding features with serious clean and distorted sounds. Digital  
Reverb, Chorus, and Delay provide you with a wide variety of sounds. Crate’s unique Channel  
Tracking feature automatically stores your DSP settings for each channel to memory. As you  
switch from one channel to another, the DSP settings for the selected channel are instantly  
recalled. The supplied three-button footswitch allows you to select channels and change the  
DSP bank (Bank A/Bank B) by “remote control.” A front panel 1/8" stereo CD input jack allows  
you to play along with your CD player, MP3 player, or iPod. A rear panel insert jack allows you  
to add even more effects by connecting an external effect processor.  
Like all Crate products, your GTD amplifier is designed by musicians and built using only the  
best components. Extensive testing confirms 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 read this manual  
before you begin playing.  
And thank you for choosing Crate.  
Here are some of the features packed into your new GTD120/212 Combo Amplifier:  
120 watts rms power output  
2 x 12" speaker  
Three-Channel Operation  
—High Gain Channel  
—Overdrive Channel  
—Clean Channel  
3-band EQ on the Overdrive and Clean Channels  
Proprietary “Shape” EQ control on the High Gain Channel  
DSP Effects including Delay, Chorus, and Reverb sections  
CD Input  
Effects Loop  
3-Function Footswitch included  
External Speaker jack  
Built-in Chromatic Tuner  
3
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GTD120/212 Guitar Amplifier w/DSP and Channel Tracking  
Channel Tracking  
Your Crate GTD120/212 gives you the power of Channel Tracking. Once you select a DSP  
setting for each channel, Channel Tracking stores the settings to memory whenever you  
change channels. When you go back to that channel, Channel Tracking recalls those DSP set-  
tings automatically, without changing the DSP controls!  
For example:  
• Select the Clean channel. Set the Chorus control to “Flanger,” the Delay control to “Echo,”  
and adjust the Reverb control to your preference.  
• Select the Overdrive channel. Set the Chorus control to “Chorus,” the Delay control to  
“Slap,” and readjust the Reverb control to a different setting. (The DSP settings for the  
Clean channel are now saved to memory.)  
• Select the High Gain channel. Set the Chorus control to “Phaser,” the Delay control  
to “Echo/Eff,” and readjust the Reverb control once again. (The DSP settings for the  
Overdrive channel are now saved to memory.)  
• Reselect the Clean channel. (The DSP settings for the High Gain channel are now saved to  
memory.)  
When you reselected the Clean channel, the DSP settings previously stored in memory were  
automatically recalled. Switch to the Overload channel and the DSP settings you just stored  
are still there. You can change the DSP settings at any time. Once you set the DSP and select  
another channel, Channel Tracking stores the settings for you. Even when the amplifier is  
turned off, the DSP settings are stored and recalled the next time you turn it on. That’s the  
power of Channel Tracking!  
In addition, each channel has two DSP banks, Bank A and Bank B, when you use the supplied  
three-button footswitch (see page 8 for more information on using the footswitch). Channel  
Tracking also remembers which DSP bank was selected for each channel.  
4
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GTD120/212 Guitar Amplifier w/DSP and Channel Tracking  
The Front Panel  
1
2
3
4
5
6
7
8
9
10  
11  
12  
13 14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
1. INPUT: Use this jack to connect your  
guitar to the amplifier by means of a shield-  
ed instrument cable.  
2. HIGH GAIN LED: This LED illuminates  
when the High Gain channel is selected.  
3. GAIN: Use this control to adjust the amount  
of distortion for the High Gain channel.  
4. SHAPE: Use this control to “dial in” the  
tone for the High Gain channel. Rotating  
this control counter-clockwise enhances the  
mid frequencies, while rotating it clockwise  
enhances the low and high frequencies.  
13. OVERDRIVE/CLEAN: Use this switch  
to select the Clean channel or the Overdrive  
and High Gain channels. With the switch in  
the out position, the Clean channel is select-  
ed. When the switch is pushed in, either the  
High Gain or Overdrive channel is selected,  
depending on the setting of the High Gain/  
Overdrive switch [6].  
14. CLEAN LED: This LED illuminates when  
the Clean channel is selected.  
15. VOLUME: Use this control to adjust the  
output level of the Clean channel.  
16. LOW: This adjusts the bass frequen-  
cies. Use this control to get the best sound-  
ing bass response for your instrument when  
using the Clean channel.  
17. MID: This adjusts the midrange frequen-  
cies. Use this control to get the best projec-  
tion and midrange tones for your instrument  
when using the Clean channel.  
18. HIGH: This adjusts the treble frequen-  
cies. Use this control to attain a bright and  
lively sound for your instrument when using  
the Clean channel.  
19-21. EFFECTS: Use these controls to apply  
and adjust the DSP effects. Complete informa-  
tion on these effects is provided on page 7.  
22. CD INPUT: Use this 1/8" stereo mini  
jack to connect the output from a CD player,  
MP3 player, laptop, etc., to the amplifier.  
The signal at this jack is summed into a  
mono signal, which is sent to the internal  
power amp circuit. Use the output level con-  
trol for the signal source to adjust the signal  
for the proper mix with your guitar.  
5. LEVEL: Use this control to adjust the out-  
put level of the High Gain channel.  
6. HIGH GAIN/OVERDRIVE: Use this switch  
to select the High Gain or Overdrive chan-  
nel. With the switch in the out position, the  
Overdrive channel is selected. When the  
switch is pushed in, the High Gain channel is  
selected. Note: This switch is only active when  
the Overdrive/Clean switch [13] is pushed in.  
7. OVERDRIVE LED: This LED illuminates  
when the Overdrive channel is selected.  
8. GAIN: Use this control to adjust the amount  
of distortion for the Overdrive channel.  
9. LOW: This adjusts the bass frequencies.  
Use this control to get the best sounding  
bass response for your instrument when  
using the Overdrive channel.  
10. MID: This adjusts the midrange frequen-  
cies. Use this control to get the best projec-  
tion and midrange tones for your instrument  
when using the Overdrive channel.  
11. HIGH: This adjusts the treble frequen-  
cies. Use this control to attain a bright and  
lively sound for your instrument when using  
the Overdrive channel.  
23. POWER: Use this switch to turn the  
amplifier on (top of the switch depressed)  
and off (bottom of the switch depressed).  
The switch illuminates when the amplifier is  
12. LEVEL: Use this control to adjust the  
output level of the Overdrive channel.  
turned on.  
5
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GTD120/212 Guitar Amplifier w/DSP and Channel Tracking  
The Rear Panel  
24  
25  
26  
27  
28  
30  
24. FUSE: The fuse protects the amplifier  
from damage caused by a faulty AC power  
source or other problems. If the fuse opens,  
replace it with the same size and type. If  
fuses continue to fail, check the AC source. If  
the source is okay, refer to page 12 or con-  
tact your Crate dealer for service information.  
25. EXTENSION SPEAKER: Use this jack  
to connect the amplifier to an external speak-  
er cabinet. This jack is wired in series with  
the internal speaker, which remains active  
when an extension speaker is connected.  
28. INSERT: Use this jack to connect an  
external signal processor to the amplifier. 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 to the effect, as shown below.  
29. POWER CORD (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 requirements  
stated on the rear panel. Do not attempt to  
defeat the safety ground connection!  
26. DSP FOOTSWITCH:  
Use this jack to connect one of the footswitch  
cables to the three-button footswitch (sup-  
plied). This allows you to select between two  
DSP presets for each of the three channels.  
Additional information about the operation  
of the footswitch is on  
30. ELECTRONIC TUNER (cabinet top)  
The electronic tuner is active whenever the  
amplifier is turned on, providing constant  
“real-time” tuning. The row of red LEDs on  
the left indicates which note is being tuned.  
When a single LED is lit,  
Stereo-to-mono Y-cord:  
Y-adapter and 2 cables:  
page 8.  
27. CHANNEL  
it represents the note  
TIP  
RING  
SLEEVE  
RETURN  
TIP  
RING  
SLEEVE  
to Insert  
jack  
to Insert  
jack  
that appears just below  
the LED. When two LEDs  
are lit, it represents  
SEND  
GROUND  
FOOTSWITCH: Use this  
jack to connect one of  
the footswitch cables  
to the three-button foot-  
switch (supplied). This  
allows you to remotely  
switch between the  
Clean, High Gain, and  
Overdrive channels.  
Additional information  
about the operation of  
the footswitch is on  
page 8.  
(STP201, 3'  
STP202, 6'  
STP203, 9')  
the note that appears  
between them in the  
bottom row. The left  
green LED indicates the  
note is flat, and the right  
green LED indicates the  
note is sharp. The note  
is properly tuned when  
both LEDs are lit at the  
same time.  
(YPP117)  
(1/4"-TO-1/4"  
MONO SHIELDED  
CABLES)  
to  
to  
effect  
"IN"  
to  
to  
effect  
"IN"  
effect  
"OUT"  
jack  
effect  
"OUT"  
jack  
jack  
jack  
External Effect  
External Effect  
6
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GTD120/212 Guitar Amplifier w/DSP and Channel Tracking  
The DSP Section  
Normal Signal Path  
Chorus > Delay > Reverb  
Echo/Eff Signal Path  
Delay > Chorus > Reverb  
19  
20  
21  
19. REVERB: Use this control to adjust  
the amount of digital reverb effect. In its  
fully counterclockwise position, the signal  
will be “dry” (without reverb). As you rotate  
this control clockwise, the amount of reverb  
increases.  
20. CHORUS: Use this control to select the  
type of digital chorus effect. In its fully coun-  
terclockwise position, the signal will be “dry”  
(without chorus). As you rotate the control  
clockwise, you can select from three chorus  
settings, three flanger settings, or three  
phaser settings. The chart below describes  
these effects.  
21. DELAY: Use this control to select  
the type of digital delay effect. In its fully  
counterclockwise position, the signal will  
be “dry” (without chorus). As you rotate the  
control clockwise, you can select from three  
slap settings, three echo settings, or three  
echo with effect settings. The chart below  
describes these effects.  
Effect Setting  
Chorus 1  
Chorus 2  
Chorus 3  
Flanger 1  
Flanger 2  
Flanger 3  
Phaser 1  
Phaser 2  
Phaser 3  
Slap 1  
Description  
Chorus with low depth  
Chorus with medium depth  
Chorus with high depth  
Flanger with low depth  
Flanger with medium depth  
Flanger with high depth  
Phaser with low feedback  
Phaser with medium feedback  
Phaser with high feedback  
Single delay with low level  
Single delay with medium level  
Single delay with high level  
Echo with low level  
Slap 2  
Slap 3  
Echo 1  
Echo 2  
Echo with medium level  
Echo 3  
Echo with high level  
Echo/Eff 1  
Echo/Eff 2  
Echo/Eff 3  
Echo with low level before effect  
Echo with medium level before effect  
Echo with high level before effect  
7
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GTD120/212 Guitar Amplifier w/DSP and Channel Tracking  
Using the Footswitch with the DSP  
The Crate three-button footswitch supplied with the GTD120/212 allows access to an addi-  
tional DSP preset for each channel of the amplifier. When the footswitch is connected to the  
amplifier as shown below, the “original” DSP presets are active for each channel when the #3  
footswitch LED is illuminated. These are referred to as “DSP Bank A.” When the #3 button is  
switched and the LED is off, a second DSP preset may be stored and recalled for each chan-  
nel — “DSP Bank B.”  
Note: DSP Bank B presets are only accessible when the footswich is connected to the ampli-  
fier. When the footswitch is not connected, only DSP Bank A is accessible.  
“LEFT” jack  
“RIGHT” jack  
Switch #3:  
LED ON = DSP BANK A  
LED OFF = DSP BANK B  
Switch #2:  
LED ON = HIGH GAIN CH/OVERDRIVE CH  
LED OFF = CLEAN CH  
Switch #1:  
LED ON = HIGH GAIN CH  
LED OFF = OVERDRIVE CH  
[only when Switch #2 is activated (LED ON)]  
8
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GTD120/212 Guitar Amplifier w/DSP and Channel Tracking  
Suggested Settings  
Sweet ‘n Clean:  
Just a ‘Lil Nasty:  
Politely Gritty:  
OUT  
AS  
DESIRED  
OUT  
IN  
AS  
DESIRED  
OUT  
IN  
AS  
DESIRED  
Down ‘n Dirty:  
OUT  
IN  
AS  
DESIRED  
Mean & Obscene:  
IN  
IN  
AS  
DESIRED  
9
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GTD120/212 Guitar Amplifier w/DSP and Channel Tracking  
System Block Diagram  
10  
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GTD120/212 Guitar Amplifier w/DSP and Channel Tracking  
This equipment has been tested and found to comply with the limits for a Class B digital device, pur-  
suant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against  
harmful interference in a residential installation. This equipment generates, uses, and can radiate  
radio frequency energy and, if not installed and used in accordance with the instructions, may cause  
harmful interference to radio communications. However, there is no guarantee that interference  
will not occur in a particular installation. If this equipment does cause harmful interference to radio  
or television reception, which can be determined by turning the equipment off and on, the user is  
encouraged to try to correct the interference by one or more of the following measures:  
• Reorient or relocate the receiving antenna.  
• Increase the separation between the equipment and the receiver.  
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.  
• Consult the dealer or an experienced radio/TV technician for help.  
Changes or modifications to this device not expressly approved by LOUD Technologies Inc. could void  
the user's authority to operate the equipment under FCC rules.  
Declaration Of Conformity  
Manufacturer:  
LOUD Technologies Inc.  
16220 Wood-Red Rd. NE  
Woodinville, WA 98072, USA  
Product Name:  
Product Type:  
Complies with Standards:  
LVD:  
Crate GTD120/212  
Audio Amplifier  
92/31/EEC, 93/68/EEC, & 73/23/EWG  
EN60065  
EN55013, EN55020, EN55022, EN55103, EN61000-3-2,  
& EN61000-3-3  
Safety:  
EMC:  
The official Declaration of Conformity for this product is kept on file at:  
LOUD Technologies Inc., 16220 Wood-Red Road NE, Woodinville, WA 98072 • Tel: 1-866-858-5832  
11  
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GTD120/212 Guitar Amplifier w/DSP and Channel Tracking  
GTD120/212 TECHNICAL SPECIFICATIONS:  
Output Power Rating  
120W rms @ 5% THD, 8Ω, 120 VAC  
Gain  
High Gain Channel  
Overdrive Ch  
Clean Ch  
110 dB, all controls @ 10  
88 dB, all controls @ 10  
58 dB, all controls @ 10  
CD Input  
29 dB  
Maximum Input Signal Accepted  
Input Impedance  
2.5 volts rms @ 400 Hz  
470k ohm  
High Gain Channel  
Overdrive Channel  
Shape Control  
Proprietary Circuit  
Low  
Mid  
High  
20 dB range @ 80 Hz  
15 dB range @ 1 kHz  
20 dB range @ 10 kHz  
Clean Channel  
Low  
Mid  
High  
36 dB range @ 80 Hz  
15 dB range @ 800 Hz  
40 dB range @ 10 kHz  
Speaker Size and Rating  
Power Requirements  
2 x 12" (parallel) Crate Custom Design, 4 ohm total  
120 VAC, 60 Hz, 95 VA  
100/115 VAC, 50/60 Hz, 95 VA  
230/240 VAC, 50/60 Hz, 95 VA  
Size (H x W x D)  
Weight  
20.0 in/50.8 cm x 26.25 in/66.8 cm x  
13.0 in/33.0 cm  
48.7 lb/22.08 kg  
The GTD120/212 is covered with a durable 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.  
“Crate” is a registered trademark of LOUD Technologies Inc. All other brand names mentioned are trademarks or  
registered trademarks of their respective holders and are hereby acknowledged.  
Service Information:  
If you are having a problem with your GTD120/212, you can go to our website  
(www.crateamps.com) and click on Support for service information, or call 1-800-898-3211  
during business hours (7 am to 5 pm PST, Monday-Friday). If you are outside of the U.S.,  
contact your local distributor for technical support and service.  
@2006 LOUD Technologies Inc.  
16220 Wood-Red Road NE • Woodinville, WA 98072  
Part No. 0021168 Rev. A 09/06  
12  
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