2
2) INDEX
3) INTRODUCTION
4) INTRODUCTION
5) WARNINGS
6) TUBES LAYOUT,
ABOUT TUBES
7) TUBES REPLACEMENT
8) FRONT PANEL
ABOUT “iChannel”
9) REAR PANEL
10) TECHNICAL SPECIFICATIONS
11) BLOCK DIAGRAM
12) FOOTSWITCH WIRING,
TUBES GUIDE
13) CUSTOMIZE YOUR SOUND
14) CONNECTIONS
15) FILTER DIAGRAM
16) WARRANTY CONDITIONS
Index
"Art and technology can go hand in
hand" (L.DaVinci)
Inspired by the famous maxim of the Italian
genius, Gurus Amps not only compromises the
realization of his amps, choosing the best
materials and technology available, but also by an
excellent design, functionality and the image of its
products.
Gurus TRITONE is inspired by the design of some
Italian icons from the world of racing have made
unique the "Italian way" combining art and
technology.
"Gurus is not just a brand, it is a project, an idea,
a vision precisely. We can not think about the
future without remembering what was our past. "
We believe that the headlong rush to the Far
East to reduce costs, is in its descending phase,
which has already shown all its limitations,
economic, social, environmental and functional
first.
We were born as a small company that built the
best that technology had to offer, always looking
for the best materials, the best components, to
achieve something that was going to fill the gap
that formed between what the market had to
offer and what it represented the real needs of
musicians.
It’s by the close contact with guitar players at all
levels, the size of "custom shop" ready to take
new needs, criticisms, suggestions, which over
the years has allowed us to create innovative
products.
We were the first in the world to make a mini
head, low watt, that offered the great amps
sound even at low volumes, taking advantage of
the purity of Class A amplifier, at a time when all
our competitors proposed big power heads.
Today all the major manufacturers of amplifiers
have a low watt mini-head in its catalogue.
We were the first in the world to make a fully
analogue tube amplifier, totally programmable.
Today many are also along this path.
Introduction
3
TO REDUCE THE RISK OF ELECTRIC SHOCK
DO NOT REMOVE THIS COVER
DO NOT USE ANY TOOLS INSIDE
REFER TO QUALIFIED
SERVICE PERSONNEL
TO REDUCE THE RISK OF FIRE OR ELECTRIC
SHOCK DO NOT EXPOSE THIS EQUIPMENT
TO RAIN OR MOISTURE
BE SURE THAT THE ELECTRIC NETWORK POWER
SUPPLY VOLTAGE IS THE SAME INDICATED ON rear
PANEL OF YOUR TRITONE HEAD.
TURN ON THE AMP BY THE POWER SWITCH AND
WAIT 30 SECONDS TO GIVE TIME TO WARM UP
TUBES.
CHECK THE CORRECT CONNECTION OF THE
EXTERNAL DEVICES (IF USED)
GUITAR-AMP CONNECTION BY PLUG GUITAR CABLE
INTO THE ”INSTRUMENT” JACK SOCKET
GURUS TRITONE HEAD is an Italian hand-built tube
guitar amplifier undergoing to strict control methods,
able to guarantee a lifetime use; in case of technical
problems, do not try to repair the amp by yourself.
Inside the equipment there are dangerous areas with
hi-current and hi-voltage. The product servicing must
be carried out by specialized technicians and
authorized by Gurus Amps.
Inside the equipment there are no parts for which the
adjustment is at user’s care.
Be sure to have correctly carried out all the
connections and to have read this simple and swift
instruction manual, before contacting the technical
service.
RISK OF ELECTRIC SHOCK
DO NOT OPEN
WARNING
Using rules
With Gurus we also wanted to continue in the
path of innovation, giving meaning to our mile
stones of the past to create something modern
that still had not been done yet. Thus was born
iChannel.
Gurus Amps are designed to provide the best
possible interface to your favorites external
digital devices, as smartphones, tablets, personal
computers, multi-effects pedals.
iChannel receives the signal from an external pre
or a multi-effect and combines it with an
ultralinear Hi-end Power section able to convey
all the nuances of emulation software in use, thus
maximizing the effectiveness of amp modeling,
effects, etc. ...
With Gurus we wanted to implement these ideas,
and to do that we have formed a team. Young
designers, engineers, graphic designers,
commercial.
Combining skills and passions of each to create
something unique, new, 100% Italian.
Philosophy "no compromise", return to the
absolute highest quality, from design to
construction, the finest materials available, the
best available technology to achieve a target of
quality really challenging.
All This is our beliefs.
All this is Gurus Amps.
Introduction
Warning !!
4
V1 12AX7/ECC83 (HI GRADE)
V2 12AX7/ECC83 (HI GRADE)
V3 12AX7/ECC83 (BALANCED TRIODES)
V4 12AX7/ECC83 (BALANCED TRIODES)
V5 12AX7/ECC83 (BALANCED TRIODES)
V6 EL34B/6CA7
V7 EL34B/6CA7
The output power stage is near to 460 Volt.
Requires the use of suitable valves to withstand
voltages of these kind.
TUBES POSITION:
Front view, from Right to Left V1-V7
About Tubes
As the Gurus TRITONE operates in two differents
power Class configuration, it is needed to set both
the BIAS when swapping power tubes, so it is
strictly recommended to be done by a technician.
The most common signs of run-down tubes could
be: excessive noise, hi microphonic, power loss,
loss of high frequencies, bad bottom end or/and
uncontrolled changes of the output volume.
Tubes Live is estimated to 3000 hours.
This depends by tube production quality.
Tubes Replacement
Gurus Tritone has been designed using a chassis made of Aeronautical Aluminum to reduce weight and assure
the bes performances of mechanical strenght. Also Weights distribution has been studied and the handle
position has been choose for the best comfort handling it.
Design
5
Front Panel
1) Holiday/Rocking : amplifier turning on/off
2) Waiting/Playing : Stand by.
3) Class: 30W Class A - 60W Class Ab1
4) Presence: Presence control
5) Master: Amp volume level
6) SexyTone: Fine adjust of EQ Curve
7) Ch1/2 Volume: Volume for Ch.1/2
8) Gain: Gain for Ch.3/4
9) Volume: Volume for Ch. 3/4
NB: Hold Switch 18, 19,20 for two second to Mute the Amp, or entering in iChannel mode.
MIDI PRESETS STORAGE:
With a midi pedalboard connected (Transmission channel settled as Omnimode)
-select a preset
-then select a channel pressing 1 or 2 times the Ch. Switch (18.19.20)
- now save it pressing the Store switch (17).
All preset are rewritable, don’t need to clean memory.
iChannel™ offer the opportunity to receive and fit analog or digital external preamplifiers.
The high quality of input and output buffers ensure tone with unexpected dynamic.
Tritone opens a new world, offering the right interface to use the best software designed for guitar sounds usable
with: smartphone, tablet, DAW.
Some example:
Guitar > iChannel input
Fx Loop Send > Input1 Audio Interface (or an external guitar processor, modeler, profiler, etc..)
Out Audio Interface > Fx Loop Return
Cab Mic > Input 2 Audio Interface
Then you can record a Clean Track from input 1 and and another track from input 2 with your favorite plugins.
And you can use Tritone as a re-amping machine with incredible dynamic and results!
Go to “Connections” chapter to see how to connect and use iChannel
About iChannel
10) Gain: Gain for Ch. 5/6
11) Volume: Volume for Ch. 5/6
12) Bass: Bass For Chs. 3-4-5-6
13) Middle: Middle for Chs. 3-4-5-6
14) Treble: Treble for Chs. 3-4-5-6
15) iChannel: input for iChannel use
16) Normal: MAIN input for normal use
17) Store: Press for save presets via midi*
18) Clean/Britght Switch ch.1/2
19) Sexy/Crunch Switch ch. 3/4
20) Lead1/Lead2 Switch ch. 5/6
1
2
3
5
6
7
8
4
9
10
11
13
12
14
15
16
17
18
19
20
6
Rear Panel
1) Midi Thru: Midi out connection
2) Midi IN: Midi Main input
3) Remote Out: Ch. 5/6 (momentary)
4) Remote Out: Ch. 3/4 (momentary)
5) Remote Out: Ch. 1/2 (momentary)
6) Fx Loop mode: Series/Parallel (50%)
7) Return: Power In
8) Send: Preamp Out
9) Fx Loop level: Hi/lo Z
Technical Specs.
10) Speaker 16Ohm: 16Ohm Speaker:
mono jack for connecting cabinet with
the same impedance
11) S p e a k e r 8 O h m : m o n o j a c k f o r
connecting cabinet with same
impedance. If you wish to connect two
parallel cabinet 16Ohm the total
impedance is considered 8Ohm.
12) Speaker 4Ohm: mono socket for
connecting the cabinet with the same
impedance. If you wish to connect two
pa r al l el ca b in e t 8 Oh m t he t o tal
impedance is considered 4Ohm.
13) Mains Input: socket for connection to the
mains power, the plug contains a slot for the
fuse of power supply circuit. In case of failure
of a fuse, replace only with same specs fuses.
1
2
3
4
5
6
7
8
9
10
11
12
13
MAIN INPUT 117/230V - 50/60Hz
MAIN INPUT POWER 192W
MAIN FUSE T3,15A(slo blo) for 117V
T2A (slo blo) for 230V
internal HT fuse T1A
TUBES CHART: 5x12AX7B Gurus
2x EL34B/5881 Gurus
OUTPUT POWER 30/50W @4/8/16 Ohm
Amp Class Push-Pull A Class
Push-Pull Ab1 Class
Instrument Input Max 250mV - Z <1M Ohm
iChannel Input Max 250mV - Z <1M Ohm
Channels:
Clean Ch1 max 12db Gain
Bright Clean Ch2 max 14db Gain
Sexy Ch3 max 42db Gain
Crunch Ch4 max 68db Gain
Lead1 Ch5 max 120db Gain
Lead2 Ch6 max 160db Gain
Sexytone High pass Filter from 1500 Hz onwards
Tone Stack Bass 110Hz.
Middle 780Hz.
Treble 2300Hz.
Presence High pass filter from 4000Hz onwards
Send Level Max 1 Vpp Out (Hi mode)
Z Out <100KOhm
Max 0,5Vpp Out (Lo mode)
Z Out < 10KOhm
Return Level Max 1,5Vpp IN
Z In <100KOhm
Midi Settings Omnimode Out
Midi Funtcions Channel 1 to 6
Mute
Preset Store
Midi Phantom Power 9VDC out Max 500mA
Dimensions: 540x240x200mm.
Weight: 14,6Kgs.
7
Block Diagram
Analog Footswiches wiring
Tritone can be managed by a standard Midi controller or via Analog Switching Systems.
Just connect 3 standard Jack/Jack cables to have full control of all 6 Channels of Tritone,
according to following schematics. Be sure your Switching device supports Momentary mode.
8
Connections
Rig 1
-Guitar in NORMAL input
-MultiFx unit in Fx Loop
-Cabinet
-Midi pedalboard
This is the classic way to use a Head, connected
with one or more cabinets, (checking impedance)
And using a Midi Controller to handle the 6
Channels of Tritone (phantom powered), coupled
with your favorite FX units connected in the FX
Loop.
Set the FX unit or the Tritone’s loop Switch for
better fit the level: hi or Lo Z impedance (Hi for
pedals, most of rack units, basically all operates at
“Line” level)
Rig 2
-Guitar in iChannel Input
-DAW in the iChannel Loop
(hi/low Z selected if not LINE level)
-Cabinet
-Midi Pedalboard
The iChannel input, let you interface your Tritone
with other external processor, like a Smartphone,
Tablet, DAW or everything else can emulate amp
and Fx, without needing any interfaces. Just
connect it to the iChannel loop (the Fx loop,
setting the Switch on Low Z for example with a
Tablet).
So:
Guitar>iChannel input
Tritone Send>input of device (or audio interface)
Output of Device> Tritone Return
Now the guitar signal is treated by software, using
the Tritone as a re-amping machine, and let you
use your favorite emulator, respecting all the
nuance of the software thanks to its very linear
power section, adding warm and tube Dynamic.
Rig 3
-Guitar in NORMAL input
-Pedals in Fx loop (HI Z selected)
-Analog switching connected
-Cabinet
This example shows how to use a Tritone with a
complex pedalboard, using an Analog Switching
system. With 3 mono jack cables you can handle
all the 6 channels of Tritone.
Pedals can be connected in front amp or in the
loop as you prefer and managed by the same
Looper/switcher.
9
Filter Diagrams
SEXY TONE:
It is a passive control that changes the EQ curve acting on the entire range of
frequencies, is in fact easy to note that by acting on the amount of high, at the same
time you have a shift in the shape of the medium and a sensitive intervention but very
linear in the low, that are always rounded and focused
The advantages of this kind of control, are to merge into a practical single potentiometer
a true multi-band filter, able to respond to requests that our ear tells us, without ever
TONE STACK:
A Traditional Bass, Middle, Treble tone stack is dedicated to dirty channels: 3-4-5-6
In the diagram, you can see how effective the controls are.
10
Gurus product warranty covers 2 years from date of purchase with the exception of moving mechanical parts such as foot switches,
speakers and handles which have a 1 year warranty. The valves, lights and cables are guaranteed for 3 months from the date of
purchase.
The warranty does not cover damage caused by accident, misuse and / or neglect, failure to comply with the instruction manual, repair
and attempted repair by personnel not authorized by Gurus Amps, any damage caused during transport and delivery, (claims must be
presented to the carrier); damage to any product that has been altered or on which it has been removed, defaced or altered serial number;
damage caused by faulty connections or connections to equipment failures and/or defective power cables.
Responsibility of Gurus Amps for any defective product is limited to repair or replacement of the product at our discretion.
The Gurus Amps not be liable for damages resulting from loss of use of the product, lost time operation interrupted by non-use of the
product, loss of business or any other damages or incidental, consequential or otherwise; damage in transit or damage caused by
inadequate packaging or of poor quality.
Assistance: Please contact us for information on how, where and when to ship the product. The repaired goods will be packed carefully
and we recommend not include any accessories such as cables, effects, manuals, etc. ..
Please attach a copy of the original receipt of purchase (invoice or receipt) together with a problem description and your personal data.
THE WARRANTY IS NOT VALID 'WITHOUT A COPY OF YOUR RECEIPT OF SALE CERTIFYING THAT
THE DATE OF PURCHASE.
The costs of labor and material guarantee shall be at Gurus Amps charge, not Shipment costs.
Terms of Warranty
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