GTX3500H
Three-Channel Guitar Amplifier
with Advanced Digital Signal
Processing
User’s Guide
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Congratulations!
You are now the proud owner of the Crate GTX3500H
TidalWave three-channel guitar amplifier with Advanced
Digital Signal Processing. This rugged amplifier combines out-
standing features with serious clean and distorted sounds.
Dual DSP controls provide 15 “Multi” effects and 15 Delay
effects which can be combined for a wide variety of sounds.
The Tap/Save button allows you to manually set the tempo of
many of the effects and to save new DSP presets in the
amplifier’s non-volatile memory. A separate reverb control
adds even more to the array of effects.
A highly visible electronic tuner (with a Mute switch for
silent tuning) allows you to get tuned and stay in tune any
time the amplifier is turned on. The rear panel Line In and
Line Out jacks allow you to connect additional equipment for
even greater flexibility.
Channel switching, Tap/Save, and a second bank of DSP
effects may be controlled by means of the supplied four but-
ton footswitch.
Like all Crate products, your GTX3500H TidalWave ampli-
fier 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 the information contained in this
manual before you begin playing.
And thank you for choosing Crate.
3
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The Front Panel:
1
2 3 4
5
6
9
10
11
7
8
12
13
14
1. 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 power is on.
2. REV: Use this control to adjust the amount of the digital reverb effect. In its fully counter clockwise
position the signal is “dry” (without any reverb). As you rotate the control clockwise the amount of
reverb increases. The Reverb setting may be saved as a channel preset - see page 8.
3. TAP/SAVE LED: This LED flashes in time with the tempo set by the Tap/Save button (#4) and
serves as a status indicator for certain DSP activities (see page 8).
NOTE: For some of the DSP effects, the Tap/Save LED remains illuminated. The Tap/Save LED does not
illuminate when the DSP knobs are set to the Bypass position.
4. TAP/SAVE: Use this pushbutton to set the tempo of many of the effects by tapping the button
repeatedly in time with the desired tempo. The Tap/Save button is also used to save DSP presets
and to restore the factory default DSP settings. Additional information about the Tap/Save button is
on pages 7 and 8.
5. DSP DELAY: Use this control to select one of the fifteen digital Delay effects. Complete informa-
tion about the DSP effects is on page 7.
6. DSP MULTI: Use this control to select one of the fifteen digital “Multi” effects. Complete informa-
tion about the DSP effects is on page 7.
7. ELECTRONIC TUNER: The electronic tuner is active whenever the amplifier is turned on, provid-
ing constant, “real time” tuning. The bottom row of LEDs indicate which note (string) is being tuned.
The top row of LEDs provides directional queues to facilitate quick and precise tuning of your instru-
ment. The indicated note (string) is properly tuned when only the center LED is illuminated.
8. MUTE: This switch, when depressed, mutes the output signals at the Speaker jacks (#30) and the
Line Out jack (#28), allowing you to silently tune or switch instruments. The switch illuminates when
the Mute function is active.
9. CHANNEL 3 SELECT: This switch, when depressed, selects Channel 3 as the active channel.
The switch illuminates when Channel 3 is active. Channel 3 features a high gain FlexWave circuit for
extreme distortion and sustain.
4
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15
16
17
21
22
23
18
19
20
24
25
26
27
10. LEVEL: Use this control to adjust the output level of Channel 3.
11. GAIN: Use this control to adjust the amount of distortion produced by Channel 3.
12. HIGH: Use this control to adjust the high frequency level of Channel 3.
13. MID: Use this control to adjust the midrange frequency level of Channel 3.
14. LOW: Use this control to adjust the low frequency level of Channel 3.
15. CHANNEL 2 SELECT: This switch, when depressed, selects Channel 2 as the active channel.
The switch illuminates when Channel 2 is active. Channel 2 features a medium gain FlexWave cir-
cuit for moderate distortion and “crunch.”
16. LEVEL: Use this control to adjust the output level of Channel 2.
17. GAIN: Use this control to adjust the amount of distortion produced by Channel 2.
18. HIGH: Use this control to adjust the high frequency level of Channel 2.
19. MID: Use this control to adjust the midrange frequency level of Channel 2.
20. LOW: Use this control to adjust the low frequency level of Channel 2.
21. CHANNEL 1 SELECT: This switch, when depressed, selects Channel 1 as the active channel.
The switch illuminates when Channel 1 is active. Channel 1 features a low gain FlexWave circuit for
clean sounds or sounds with mild distortion.
22. LEVEL: Use this control to adjust the output level of Channel 1.
23. GAIN: Use this control to adjust the amount of distortion produced by Channel 1.
24. HIGH: Use this control to adjust the high frequency level of Channel 1.
25. MID: Use this control to adjust the midrange frequency level of Channel 1.
26. LOW: Use this control to adjust the low frequency level of Channel 1.
27. INPUT: Use this jack to connect your guitar to the amplifier by means of a shielded instru-
ment cable.
5
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The Rear Panel:
28 29
30
31
32
28. LINE OUT: When using an external effects processor, connect this jack to the input of the
effect by means of a shielded signal cable. This jack also doubles as a source for a post-EQ,
preamp signal to send your signal to a mixing board, recorder, powered monitor or external
amplifier.
29. LINE IN: When using an external effects processor, connect this jack to the output of the
effect by means of a shielded signal cable. This jack also doubles as a direct connection to the
power amp, bypassing the input and preamp stages. This is useful for “slaving” a pair of ampli-
fiers together.
30. SPEAKERS: Use these jacks to connect the amplifier to your speaker cabinet(s) using
speaker cables with mono 1/4” plugs. These jacks are wired in parallel. Make sure that the com-
bined impedance of your speakers is equal to or greater than 2 ohms! Use the chart below to
help determine parallel loads. If in doubt, ask your dealer.
CAB IMP # CABS TOTAL IMP
CAB IMP # CABS TOTAL IMP
4 ohms
8 ohms
8 ohms
2
2
4
2 ohms
4 ohms
2 ohms
16 ohms
16 ohms
16 ohms
2
4
8
8 ohms
4 ohms
2 ohms
31. FOOTSWITCH: Use this jack to connect the footswitch cable (5-conductor midi cable) to the
four-button footswitch (supplied). This allows you to remotely switch between the channels, set
tap tempos, save new presets, and access a second set of DSP presets. (See page 9 for addi-
tional information.)
32. FUSE: The fuse protects the amplifier from damages caused by a faulty AC power source and/or
other problems. If the fuse fails, 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.
33. AC LINE 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 require-
ments stated on the rear panel. Do not attempt to defeat the safety ground connection.
6
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The DSP Section:
The GTX3500H features DSP controls
for Reverb, Delay and Multi. Complete
information about the Delay and Multi
effects is given below. The Delay control
selects the delay or echo effects. All of
these effects have their speed controlled by the Tap/Save button. The Multi control
selects the “pitch modified” and wah effects. Many of these effects have their speed
controlled by the Tap/Save button. Additional information is provided on pages 5 and 10.
SIGNAL PATH FOR ECHO LO, MID & HI EFFECTS:
SIGNAL PATH FOR ALL OTHER EFFECTS:
DELAY MULTI
MULTI DELAY
DELAY:
NAME
DESCRIPTION
TAP/SAVE BUTTON CONTROLS:
time: .05–1 second
time: .05–1 second
time: .05–1 second
time: .05–1 second
time: .05–1 second
time: .05–1 second
time: .05–1 second
time: .05–1 second
time: .05–1 second
time: .05–1 second
time: .05–1 second
time: .05–1 second
time: .05–1 second
time: .05–1 second
time: .05–1 second
n/a
Single LO
Single MID
Single HI
Single MAX
Echo LO
Echo MID
Echo HI
Echo MAX
Tape LO
Single delay w/low level
Single delay w/medium level
Single delay w/high level
Single delay w/maximum level
Echo w/low level
Echo w/medium level
Echo w/high level
Echo w/maximum level
Tape echo w/low level
Tape MID
Tape HI
Tape echo w/medium level
Tape echo w/high level
Tape MAX
Echo FX LO
Echo FX MID
Echo FX HI
Bypass
Tape echo w/maximum level
Echo w/low level, before multi effect
Echo w/medium level, before multi effect
Echo w/high level, before multi effect
dry signal - no effect
MULTI:
NAME
DESCRIPTION
Chorus w/low depth
TAP/SAVE BUTTON CONTROLS:
speed: 1 cycle/tap - tap period: .05–1 second
speed: 1 cycle/tap - tap period: .05–1 second
speed: 1 cycle/tap - tap period: .05–1 second
speed: 4 cycle/tap - tap period: .05–1 second
speed: 4 cycle/tap - tap period: .05–1 second
speed: 4 cycle/tap - tap period: .05–1 second
speed: 2 cycle/tap - tap period: .05–1 second
speed: 2 cycle/tap - tap period: .05–1 second
speed: 2 cycle/tap - tap period: .05–1 second
speed: 1 cycle/tap - tap period: .05–1 second
speed: 1 cycle/tap - tap period: .05–1 second
speed: 1 cycle/tap - tap period: .05–1 second
n/a
Chorus LO
Chorus MID
Chorus HI
Flange LO
Flange MID
Flange HI
Phaser LO
Phaser MID
Phaser HI
Vibrato LO
Vibrato MID
Vibrato HI
Octave Down
Touch Wah
Reverse Wah
Bypass
Chorus w/medium depth
Chorus w/high depth
Flanger w/low depth
Flanger w/medium depth
Flanger w/high depth
Phaser w/low feedback
Phaser w/medium feedback
Phaser w/high feedback
Vibrato w/low depth
Vibrato w/medium depth
Vibrato w/high depth
Adds signal one octave lower
Touch-sensitive wah-wah
Inverted wah-wah
n/a
n/a
n/a
Dry signal - no effect
7
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Storing Your Own Presets:
Each channel of the GTX3500H has two factory assigned Effects presets, as shown
on pages 10 and 11. No matter what the settings of the Rev, Delay and Multi controls,
the DSP and reverb presets are recalled when a channel is selected. You may change
the DSP and reverb settings by rotating the Rev, Delay and Multi controls - these
changes will remain active until a different channel is selected, but will not be there for
later use unless they are saved. To save a new preset to a channel, first make the
desired changes. Then press and hold the Tap/Save button for about three seconds. The
Tap/Save LED will flash through three quick sequences, indicating the preset was saved.
The new preset is stored for that channel and will remain in memory until a new preset is
stored for that channel or the factory presets are restored.
We recommend making copies of page 14 of this manual for the purpose of writing down your own presets.
3 SECONDS
CHANGES ARE
SAVED AS
NEW PRESET
Restoring the Factory Presets:
The factory assigned presets may be restored, erasing any changes you have made.
Turn the amplifier off. Press and hold the Tap/Save button as you turn the amplifier on.
The Tap/Save LED will flash through two quick sequences, indicating the factory presets
have been restored.
More About the Tap/Save Button:
The Tap/Save button is used to set the tempo of an effect simply by tapping on it in
time to the desired tempo – the time between the taps sets the timing of the effect. (If the
tempo entered is greater than one tap per second, the tempo will default to one second,
which is the maximum tap-tempo time period.)
The Delay effects and the Multi effects may each have a different tap speed. The
default “target” for the Tap/Save button is the Delay control. To select the Multi control as
the tap button’s target, rotate the Multi control. The Tap/Save tempo function will auto-
matically revert back to the Delay control 16 seconds after the Multi control is rotated, or
when the tap speed was last changed for the Multi effect. (If the Delay control is set to
Bypass, the Tap/Save function will not revert to Delay.)
NOTE: In most cases, it is usually more pleasing to the ear to set a slower tap speed for the “HI” effects
and a faster tap speed for the “LO” effects, as listed on page 7.
8
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Using the Footswitch:
The special Crate four-button footswitch supplied with the GTX3500H performs a
variety of functions. The footswitch allows remote channel selection, remote Tap/Save
for each channel, and allows access to an additional DSP preset for each channel of
the amplifier. Use only the supplied Crate four-button momentary footswitch with the
GTX3500H. A standard 5-wire midi cable (supplied) may be used to connect the
footswitch to the amplifier.
GTX3500H REAR PANEL
When the footswitch is connected
to the amplifier, the first tap of but-
tons 1 - 3 select the corresponding
channel. Once a channel is selected,
consequent taps of the same button
produce the same results as tapping
the front panel Tap/Save button – you
can use the footswitch to store pre-
sets and set the tempo of an effect.
(See page 8.)
The “original” DSP presets are
active for each channel when the #4
footswitch LED is illuminated. These
are referred to as “DSP Bank ‘A’.”
When the #4 button is switched and
the LED is off, a second DSP preset
may be stored and recalled for each
channel - “DSP Bank ‘B’.”
5-Conductor
MIDI cable
FOOTSWITCH
NOTE: DSP Bank “B” pre-
1
2
3
4
sets are only accessible
when the footswitch is
connected to the amplifier.
When the footswitch is not
connected, only DSP Bank
“A” is accessible.
CH. 1 SELECT;
CH. 2 SELECT;
CH. 3 SELECT;
LED on: DSP BANK A
9
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DSP Factory Presets:
The GTX212 Factory Presets for the DSP section are as follows:
Factory Preset 1: Clean w/Chorus, Delay, Reverb
CHANNEL:
1
2
3
BANK:
"A"
"B"
TAP Tempo MEDIUM
TAP Tempo MEDIUM
Factory Preset 2: Rhythm w/Slapback Delay
CHANNEL:
1
2
3
BANK:
"A"
"B"
TAP Tempo FAST
TAP Tempo N/A
Factory Preset 3: Solo w/Flange, Delay, Reverb
CHANNEL:
1
2
3
BANK:
"A"
"B"
TAP Tempo MEDIUM
TAP Tempo MEDIUM
10
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DSP Factory Presets:
The GTX212 Factory Presets for the DSP section are as follows:
Factory Preset 4: Clean w/Reverb
CHANNEL:
1
2
3
BANK:
"A"
"B"
TAP Tempo N/A
TAP Tempo N/A
Factory Preset 5: Rhythm w/Reverb
CHANNEL:
1
2
3
BANK:
"A"
"B"
TAP Tempo N/A
TAP Tempo N/A
Factory Preset 6: Solo w/Reverb
CHANNEL:
1
2
3
BANK:
"A"
"B"
TAP Tempo N/A
TAP Tempo N/A
11
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Suggested Settings:
"Oceanic"
Clean with
Vibrato, Delay,
& Reverb
TAP Tempo MEDIUM
TAP Tempo FAST
TAP Tempo MEDIUM
TAP Tempo N/A
TAP Tempo MEDIUM
"Super Funk"
Clean with
Wah, Delay,
& Reverb
TAP Tempo N/A
"Arena"
Rhythm with
Reverb
& Delay
TAP Tempo N/A
"Haze Faze"
Rhythm with
Phase
& Reverb
"Solo Wah"
Solo with
Wah, Delay
& Reverb
TAP Tempo N/A
"Octanator"
Solo with
Octave
& Reverb
TAP Tempo N/A
TAP Tempo N/A
12
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Suggested Settings:
13
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DSP “Fill in the Blanks” (User Settings):
Copy this page to fill in your own DSP Presets!
User Preset: _____________________________________
CHANNEL:
1
2
3
BANK:
"A"
"B"
TAP Tempo ___________
TAP Tempo ___________
User Preset: _____________________________________
CHANNEL:
1
2
3
BANK:
"A"
"B"
TAP Tempo ___________
TAP Tempo ___________
User Preset: _____________________________________
CHANNEL:
1
2
3
BANK:
"A"
"B"
TAP Tempo ___________
TAP Tempo ___________
14
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System Block Diagram:
TUNER
A BC D EF G
CHANNEL 1
FLEX
INPUT
BUFFER
WAVE
LEVEL
LEVEL
LEVEL
(LOW
GAIN)
INPUT
GAIN
GAIN
GAIN
HIGH MID LOW
HIGH MID LOW
HIGH MID LOW
CHANNEL 2
FLEX
WAVE
(MEDIUM
GAIN)
CHANNEL 3
FLEX
FOOTSWITCH
WAVE
1
2
3
4
(HIGH
GAIN)
MUTE
SWITCH
CONTROLLER
LINE
OUT
DSP
A/B
TAP/
SAVE
LINE
IN
DSP
POWER
AMP
REV
DELAY
MULTI
SPEAKERS
TUBE AMP
SIMULATING
DAMPING CIRCUIT
15
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GTX3500H TECHNICAL SPECIFICATIONS:
Output Power Rating
350W RMS @5% THD, 2Ω, 120 VAC
Input Impedance
470kΩ
Total System Gain
Ch 1
Ch 2
Ch 3
74dB, all controls @10
88dB, all controls @10
103dB, all controls @10
Maximum Input Signal Accepted
5 volts peak-to-peak
Channel 1
Low Control
Mid Control
High Control
26dB range @ 70Hz
10dB range @ 900Hz
20dB range @ 10kHz
Channel 2
Low Control
Mid Control
High Control
26dB range @ 70Hz
10dB range @ 900Hz
20dB range @ 10kHz
Channel 3
Low Control
Mid Control
High Control
17dB range @ 100Hz
16dB range @ 1kHz
12dB range @ 7kHz
Power Requirements
120 VAC, 60Hz, 95VA
100/115VAC, 50/60Hz, 95VA;
230VAC, 50/60Hz, 95VA
Size and Weight
10” H x 30” W x 10-3/8” D, 41 lbs.
The GTX3500H 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.
Declaration Of Conformity
#30 , Effective 01-01-2001
Manufacturer’s Name:
Production Facility:
SLM Electronics
1901 Congressional 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
Production Facility:
Shipping Facility:
Office Facility:
Product Type:
Audio Amplifier
Complies with Standards:
LVD:
Safety:
EMC:
92/31/EEC, 93/68/EEC, & 73/23/EWG
EN60065
EN55013, EN55020, EN55022, EN61000-3-2,
& EN61000-3-3
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
@2004 SLM Electronics, a division of St. Louis Music, Inc • 1400 Ferguson Avenue • St. Louis, MO 63133
47-499-01 • 030204
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