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Genz Benz El diablo 60 Owner's Manual

El diablo 60-TS El diablo 60-C

Made by: Genz Benz
Type: Owner's Manual
Category: Amplifier
Pages: 13
Size: 2.26 MB

 

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Head and Combo Versions:

El Diablo 60 (Head)

El Diablo 60-TS (Head – Tribal Series)

El Diablo 60-C (Combo)

CONGRATULATIONS!

Thank you for your purchase of the GENZ BENZ EL DIABLO 60. I believe you will find that this tube amp will immediately 

become an invaluable tool in your quest for the best possible guitar tone. EL DIABLO’s versatile features will certainly en-

hance the feel and character of your individual playing style.

Our engineers and resident “tone staffers” have worked extremely hard to develop and build this world-class guitar amplifier 

for you. Please take time to read through this manual and familiarize yourself with the features and design of your new EL 

DIABLO 60.

We are proud that you’ve chosen this professional and attractive tone machine and we trust that you will discover all that it 

offers.  

Have fun and take it to the limit!!!

Respectfully,

Jeff Genzler

Founder/Builder/Player

OWNERS MANUAL

 


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•  Six Triode Preamp Stages (3-2AX7’s)

•  Two Power Tubes (w/Ruby Tubes® EL 34’s)

•  Military Spec. Double-sided Glass Epoxy Circuit Boards

•  All Custom Wound Transformers

•  Transformer Based Phase Inverter for Optimum Power Tube    

   Grid Drive

•  Heavy-duty Steel Chassis, Mounted within a Sturdy Birch  

 

   Plywood Cabinet

FEATURES:

•  Pentode 60 Watt/Triode 30 Watt Output Section

•  Two Versatile Tube Channels

•  Four Button Footswitch Included

•  Master Effects Loop

•  Frequency Compensated D.I. Section

•  Ruby Tubes® Long Pan Reverb

•  GBE 240-V75 Loudspeaker (combo version)

CAUTIONS AND WARNINGS:

•  Tube amplifiers, especially high-powered tube amps, generate heat.  Allow at least 4 inches (60mm) of clearance  

   around the back of the amplifier cabinet.  Keep clear of curtains and other flammable materials.  Avoid contact with    

   hot tubes.

•  Do not expose amplifier to moisture, rain, splashed water, beverages, etc.

•  Be sure that a speaker load is connected to the amplifier before applying power; otherwise damage to the amplifier  

   could result.

•  Be sure that the amplifier is properly grounded.  Do not defeat the ground pin on the AC power input plug.  The      

   ground is there to protect the user from the possibility of shock.

•  Be sure that the AC power (mains) voltage selector switch is configured for the proper voltage (115 volts or 230  

   volts) for the area you are located before connecting the amplifier to the power source.  In the event of a  

 

   thunderstorm, remove the power plug from the wall socket to prevent damage due to the possibility of lightening   

   strikes.

•  Turn off power to the amplifier (or place in standby) when changing wiring connections to prevent damage to     

   speakers from possible (and unexpected) loud noises.

•  WARNING: This amplifier is capable of extreme high decibel output. Always protect your hearing. Your hearing is  

   an invaluable tool in appreciating the tone of EL DIABLO 60.

•  There are no user-serviceable parts inside the chassis.  Refer all service to qualified service personnel.

•  Always unplug the amp when changing the power or preamp tubes.  Never touch the tubes if they are still hot. 

•  Always wait to move the amp after use until the tubes have cooled.  This will prevent tube damage and extend     

   tube life. A few minutes should be sufficient.

•  While we have made every attempt to outline all general cautions, the ultimate responsibility for safe operation of  

   this or any amplifier product rests with the consumer.  Common sense should be practiced at all times when using  

   the amplifier.

AMPLIFIER OVERVIEW:

The 

GENZ BENZ EL DIABLO 60 contains a unique combination of circuits, including vintage tube circuits, carefully 

engineered “hot-rod” tube circuits and advanced tone shaping techniques. EL DIABLO 60 delivers unique tone, drive 

and versatility, which is exemplified by the 10 distinctive tone variations easily accessible through the four button 

footswitch (included).  This flexibility allows endless possibilities to craft your own personal repertoire of tone and 

expression.

The unique 

PENTODE / TRIODE design of the tube amplifier adds to the versatility of the EL DIABLO 60— 

essentially 2 different amps in one!!  In the 

60-watt PENTODE MODE the amp responds with its bold,  “spanky”, 

rich clean tone and classic overdrive sustain, all the way into aggressive Hi Gain brutality and all points in between.  

With the 

30-watt TRIODE MODE the El Diablo 60 produces a more vintage, fuller, fatter tone with a more dynamic 

response and increased power tube break-up with a darker complexity.  Experimentation with all of this flexibility will 

reward you with a tremendous tonal pallet for your specific playing style or song selection.

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The 

WARM CHANNEL offers full, round pristine clean response cascading up to pushed vintage gain with warm  

upper mid break-up, rich bass and abundant sustain.

The 

HOT CHANNEL takes you from rich classic tube break-up to full-bodied hi gain splendor.  The option of a  

Dynamic or Compressed setting insures the amplifier responds to your every touch; no squashed tone or harsh 

buzziness here!!

Both channels utilize our 

ACTIVE TONE NETWORK for signal shaping of the guitar signal to the tube power amp. 

This unique tone network is an incredible tool for enhancing your guitar tone.  Each frequency offers a true +/- 5 

dB of cut or boost and will provide dramatic changes with just some minor adjustments. It may be very different from 

your previous amps, so experiment with some moderate settings at first to gain a “feel” for how versatile a tool this 

network can be.

Our 

GLOBAL section offers master controls of the internal Ruby Tubes® reverb, amplifier output volume and our 

unique Attack circuit that provides a wide range of variable upper mid frequency boost that enhances pick attack and 

bite which is extremely effective as a lead boost and cutting through the mix.

Overall, we ask you to take some time and experiment with the many options and tonal variations that you will  

discover at your fingertips within the EL DIABLO 60.  Reading through the OWNER’S MANUAL will give you an  

excellent baseline of knowledge and insight as to the tone you can accomplish and harness for your individual  

playing style.

FRONT PANEL OVERVIEW:

1. 

¼” INPUT JACK - This jack is unbalanced and high impedance to allow for the correct matching of the instru-

ment’s pick-ups with the input circuitry of the amplifier.  The input circuitry has been carefully engineered to minimize 

pick-up loading and maximize tone and sustain. This is a tube buffered input stage. This is a premium 12AX7 tube 

specifically selected for its low micro-phonics and high gain characteristics.

2. 

GAIN CONTROL – The Warm channel Gain Control provides a variety of gain settings, from “spanky clean” to 

“pushed” vintage sustain.  

3. 

VOLUME CONTROL – This preamp volume controls the overall volume of the Warm channel.  Use this control 

together with the Gain Control to balance out the overall output of this channel.  If your channel Gain Control is set very 

high, we do not recommend running this control “all the way up”. Due to the tremendous gain potential in our Tone sec-

tion, this may cause some unwanted distortion.

4-6. 

TONE SECTION – Three tone circuits are included for the Warm channel.  The bass, mid and treble  

frequencies have been pre-selected in order to provide articulate, full-range tone shaping response specifically  

tailored to the design of the EL DIABLO 60.  As you can see, these circuits provide a huge cut or boost of 5dB, offering 

untold flexibility in tone shaping. Use this section with subtle changes—click by click--at first so that you can gain a “feel” 

for the versatility of our tone network.  We do not recommend running all tone controls at the full +15dB position, due to 

the extreme gain this could cause along with some unwanted distortion of the network.

7. REVERB CONTROL – This control pot adjusts the signal send level to the on-board Ruby Tubes® long pan reverb.  

This control works in conjunction with the global reverb control. Different styles of lush, or “splashy” warm analog re-

verbs are possible by running the channel reverb high and the global control low and also vise versa.  Experiment with 

these settings to find the sound that best suits your style.

3

WARM CHANNEL:

 


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HOT CHANNEL:

8-10. CHANNEL SELECTOR SWITCH AND INDICATOR LIGHTS – This is your channel selector switch for the Warm or 

Hot channels.  The placement of this switch between the channels and the bright marker LED’s clearly illustrates which 

channel is active.  

11. GAIN SWITCH / CLASSIC or HIGH – This gain switch sets the gain structure for the Hot channel.  Use this switch 

in conjunction with the Hot Channel Gain control. With a little experimentation it will be easy to hear that driving the gain 

control in the maximum position is not as critical as on other amps.  Articulate high gain splendor can be achieved without 

cranking the gain to 0.  This switch should be in the out position when the footswitch is used.

12. TEXTURE SWITCH / DYNAMIC or COMPRESSED – This switch changes the character of this tube  channel.  

Changing from Dynamic to Compressed provides another tonal variation for the guitarist.  The Compressed setting offers 

additional compression of the signal along with a more aggressive, overdriven character, ideal for tight and punchy bass 

response.  This feature is more distinctive depending upon the setting of the Gain Control.  This switch should be in the 

out position when the footswitch is used.

13. GAIN CONTROL – The Hot channel gain control provides a variety of gain settings; from a richly saturated clean tone 

to fully overdriven high gain nirvana.  Use this control in conjunction with the Gain Switch for this channel. Lower settings 

will provide a less overdriven tone. 

14.VOLUME CONTROL - This preamp volume controls the overall volume of the Hot channel.  Use this control together 

with the Gain Control and Gain Switch to set the overall volume of this channel. If your channel Gain control is set very 

high, we do not recommend running this control “all the way up”. Due to the tremendous potential gain of the El Diablo 60 

this may cause some unwanted feedback or squeal from the preamp tubes becoming micro-phonic.

15. TUBE CONTOUR CONTROL – This is a unique circuit to the EL DIABLO design.  This Contour control adds an ad-

ditional “tone stack” within the tube preamp, which interacts with and changes the loading of the tube as the control knob 

is turned.  When the control is left of center, it produces a more midrange tone and adds a more “vintage” character to 

the tone.  When used from the center position to the far right, it produces a more modern tone with more bass and highs.  

This circuit will also interact with the Classic and High gain settings and the Dynamic and Compressed settings.

16-18. TONE SECTION – Three tone circuits are included for the Hot channel.  The bass, mid and treble  frequencies 

have been pre-selected in order to provide articulate, full-range tone shaping response specifically  

tailored to the 

design of the EL DIABLO 60.  As you can see, these circuits provide a huge cut or boost of 15dB offering untold flexibility 

in tone shaping. We do not recommend running all tone controls at the full +15dB position. To avoid having the preamp 

tubes becoming micro-phonic and producing feedback or squeal, keep the treble and attack features to moderate (below 

2:00) settings, when using maximum gain settings at high volumes.

19. REVERB CONTROL – This control pot adjusts the signal send level to the on-board ACCUTRONICS® long pan 

reverb.  This control works in conjunction with the global reverb control. Different styles of lush or “splashy” warm analog 

reverbs are possible by running the channel reverb high and the global control low and also vise versa.  Experiment with 

these settings to find the sound that best suits your style.

20. GLOBAL ATTACK SWITCH – Different than a presence, this unique circuit boosts a specific range of upper mid 

frequencies which enhances pick attack and bite.  This “frequency multiplier” circuit is extremely effective as a lead boost 

and helps to cut through the mix.  This circuit can be engaged in either preamp channel or gain setting and can add a 

more aggressive attack to any tone setting on the amp.  This switch should be in the out position when the footswitch is 

used.

21. GLOBAL ATTACK LEVEL CONTROL – This level control provides a variable amount of Attack “boost” to the amp.

22. GLOBAL REVERB CONTROL – This control adjusts the level of the reverb return signal from the on board Ruby 

Tubes® long pan reverb.  This control works in conjunction with the channel reverb send controls to provide different 

styles of warm, lush analog reverb.

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23. GLOBAL VOLUME CONTROL – This knob controls the final output stage of the amplifier and is the Master Vol-

ume for the EL DIABLO.  It should be noted that this control is best set between the 9 o’clock and 2 o’clock positions.  

Each channel volume should be adjusted accordingly to achieve the desired total amplifier output.  For lower volume 

settings, you can power the unit down to 30 watts with the PENTODE / TRIODE power level selector switch on the 

back panel.

24. STANDBY SWITCH – The standby switch removes the high voltage from the plate circuit of the output tubes to 

protect the tubes from “cathode stripping” when first powering up the amplifier.  The recommended start-up  

procedure is to place the standby switch in the standby position, turn on the power switch and allow the amplifier to 

warm up for at least 30 seconds before switching the standby switch to the operate position.  This will help to prolong 

the life of your output tubes.

25. POWER SWITCH – This switch turns on the AC power to the amp.  When this switch is turned on, power is ap-

plied to the heater circuits of all tubes, the high voltage power supplies are allowed to stabilize and the low voltage 

power supplies are energized.  

Power should be switched on only with the standby switch in the standby  

position.  Refer to #24 for information concerning the operation of the standby function.

REAR PANEL OVERVIEW:

1. VOLTAGE CHART – Your EL DIABLO 60 is truly a “world class” amplifier.  This voltage chart is provided so that 

choosing the correct fusing for the desired international country is simple and accurate.  The EL DIABLO’s internal 

power transformer can be re-wired for 00 volt use for JAPAN.  

WARNING:  ONLY A FACTORY QUALIFIED SERVICE TECHNICIAN SHOULD EVER ATTEMPT THIS ALTERA-

TION.

2. VOLTAGE SELECTOR SWITCH - This switch changes the voltage of the AC power with which the amp will oper-

ate.  115 volts is the standard in the USA and CANADA.  230 volts is the standard for most of EUROPE and SOUTH 

AMERICA.  Consult the voltage chart if you plan to use this amp for a different voltage other than how it was shipped 

from the factory so that the proper fuse can be inserted.  The DIABLO 60 is rated for operation on both 50 Hz and 60 

Hz power sources.

3. IEC RECEPTACLE & FUSE HOLDER – The detachable power cord should be inserted here before the cord is 

plugged into an AC power source.  Within the bottom portion of this receptacle is a small drawer that holds the mains 

power fuse.  An extra fuse is included in this plastic receptacle.  It may be necessary to use a small tool to pry the 

small drawer open.

WARNINGS:

•  NEVER OPEN THIS FUSE HOLDER WITH THE POWER CORD PLUGGED IN .

•  USE ONLY THE FUSE VALUE AS INDICATED IN THE VOLTAGE CHART. 

•  NEVER ATTEMPT TO DISABLE THE MAINS POWER FUSE.

4. FOOTSWITCH INPUT – This 5 pin DIN connector is where EL DIABLO’s 4-button footswitch should be attached. 

A 25-foot cord is attached to the heavy-duty steel footswitch.  This should provide plenty of room for the performer 

to get out in front of the amp.  Some internal circuitry “clicking” may be heard if the amp is on when this footswitch is 

plugged in.  This is normal and is actually part of the circuitry that provides the noiseless switching on the EL DIAB-

LO 60. NOTE: The front panel function switches over-ride the footswitch functions. The front panel function switches 

should be in the out position when the footswitch is used.

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5. EFFECTS LOOP – The EL DIABLO is designed with a serial effects loop.  The effects loop is a post master sec-

tion loop and is an ideal place to send the entire preamp signal out to another amp using only the send jack, or to 

insert a global effect such as a compressor (serial effect) or a digital effects processor (a serial effect when used with 

the processor’s own  “wet/dry” mix control).  The return is also a handy input for connecting the power amp stage to 

the output of another preamp or signal source.

6. LINE OUTPUT – This ¼” jack provides an unbalanced signal that is derived after the power amplifier and output 

transformer. This line level output is ideal for driving a powered speaker that requires a line level input, or for driving 

an additional instrument amplifier that requires an instrument level signal.  This signal is frequency compensated to 

emulate the same tone coming through the amplifiers speaker cabinet.

7. SPEAKER OUTPUTS – These parallel speaker jacks are provided for connecting to the guitar cabinet of choice.  

It is important to become familiar with using the impedance selector switch and impedance calculator so that the 

proper cabinet impedance is selected for the safe and efficient operation of this high output tube amplifier.  Note: The 

El Diablo 60 combo version comes loaded with an 8-ohm loudspeaker.

WARNINGS:

•  NEVER UNPLUG THE SPEAKER CABLE FROM THE GUITAR CABINET WHEN THE AMP IS ON!!! 

•  DO NOT OPERATE THIS AMP WITHOUT A SPEAKER LOAD PLUGGED INTO ONE OF THE SPEAKER 

JACKS.

 

•  THE EL DIABLO 60 OFFERS SOME PROTECTION AGAINST THIS DAMAGE BUT IT IS NEVER A GOOD 

IDEA TO OPERATE ANY TUBE AMP WITHOUT A SPEAKER LOAD ATTACHED. 

8. IMPEDANCE SELECTOR SWITCH – This 3 position switch is designed to easily select the appropriate output 

transformer impedance tap for the desired cabinet load being used.  A 6 ohm, 8 ohm and 4 ohm position is offered.  

It is important to know the total impedance of the guitar cabinets being used with your amp.  It is important 

for amplifier performance, tube life and output transformer protection to select the correct impedance for your chosen 

guitar cabinet.  Consult the rear panel impedance calculator for this information.

9. IMPEDANCE CALCULATOR – As part of making the GENZ BENZ EL DIABLO 60 both user- friendly and conve-

nient to use, we have included a comprehensive impedance chart so that this information is always accessible to the 

user.

10. PENTODE 60/TRIODE 30 POWER MODE – This switch easily and safely reduces the output power of the amp 

from 60 watts to 30 watts by changing the parameters by which the power tubes function—Pentode or Triode. In the 

60-watt PENTODE MODE, the amp responds with its  “spanky”, rich Clean tone and Classic overdrive sustain, all 

the way into aggressive Hi Gain brutality and all points in between.  In the 

30-watt TRIODE MODE, the El Diablo 60 

produces a more vintage, fuller, fatter tone with a more dynamic response and increased power tube break-up with a 

darker complexity.

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TUBE BIAS SECTION

  – The Tube Selector switch is provided for setting the correct bias for the power tubes 

used.  The EL DIABLO 60 ships from the factory with a matched set of Ruby Tubes® EL 34 power tubes.  The EL 

DIABLO will also operate with 6L6 or 588 power tubes. When using either of these tubes, the bias should be set to 

the 6L6 position.  For harmonic complexity and maximum power, we recommend EL34’s. When switching the tube 

types or brand of tubes, your amp should be re-biased to obtain optimum performance, tone and tube longevity.

    

SETTING THE BIAS

 – Generally your amp will only need to be re-biased if you are replacing the power tubes.  

However, if you replace the Ruby Tubes® EL34 power tubes with the same brand and type having the same “PC’ 

number located on the label at the base of the tube, then re-biasing is not necessary.  To re-bias your amp you will 

need a small screwdriver and a multi-meter or volt/ohm meter set to measure DC voltage.  (If you do not have this 

equipment, skill, experience or do not feel comfortable making these adjustments, you should have a qualified tech-

nician perform this procedure.)

First make sure the Tube Selector switch located in the Tube Bias section on the rear panel matches the    

 

tube type installed.  Then, with the Master Volume turned all the way down, turn the Power switch  

 

 

ON leaving the Standby switch in the Standby position.

2. 

Set your test meter to read DC voltage. Then place the negative (black) lead of your meter into the black    

 

Test Point located in the Tube Bias section on the rear panel.  Then place the positive (red) lead of  

 

 

your meter into the red Test Point.  Depending on the size of your test leads, you may have to hold them in  

 

the Test Points to assure a good connection.

3. 

After the tubes have warmed up for about a minute, turn the Standby switch to the Operate position and    

 

read the voltage on your meter.  With a small screwdriver, you will need to adjust the Bias Adjust trim  

 

 

pot located just above the Test Points so that your meter reads about 

0.600 volts if you are using EL34    

 

tubes and about 

0.450 volts if you are using 6L6 tubes.  Turning the Bias Adjust trim pot clockwise  

 

 

will increase the voltage and turning it counterclockwise will decrease the voltage.

4. 

After initially setting the bias, allow your amp to warm up for about 5 more minutes then retest and readjust  

 

the bias as indicated above.  Exact readings are not critical and some fluctuation is normal.  Just try to get  

 

as close to the target voltage as possible.

5. 

Your amp is now biased and ready to play!

Tube Bias Background Information – All amplifiers (solid-state or tube) require bias to work properly. In a single 

ended amplifier, the requirements are simple in that the tube should be “biased” or operated so that with no signal 

present, DC current should flow through the output stage (tube and transformer) at approximately 1/2 the maximum 

design value. When the signal transitions “positive”, the current increases from the quiescent position and when the 

signal transitions “negative”, the current decreases from the quiescent position. So you can see that if there was no 

bias, there would be no quiescent current, thus no way to operate properly for the negative “going” portion of the 

signal, limiting the negative side of the waveform. Too much bias would limit the amount of current you could add for 

positive “going” signals, limiting that side of the waveform.

7

Pentode/Triode Background Information – The native mode of virtually all power tubes in guitar amplification is 

the power pentode. In a conventional pentode topology fixed bias amplifier, the screen grid connects to the screen 

supply via screen resistors and the screen potential varies (somewhat) with the audio signal thus increasing the 

efficiency of the amplifying process and maintaining more controlled linear high frequency response. There is a 

sonic difference that is added by these additional control elements though, and some may prefer alternate modes of 

operation.

Power triodes do have a mellowness and warmth that is a desirable tonal character for many players. A true power 

triode has only an anode, cathode and one control grid.  Without suppressor (and beam forming) grids, there is a 

lack of control of the electron stream, which can cause electrons to stray from the intended path and collide with  

unintentional targets. This wastes energy and thus efficiency, but provides a unique tonal character that guitarists 

seek.  Fortunately, several methods exist that allow us to operate pentode power tubes in triode mode by fixing the 

screen grid more solidly to the plate supply (with the TRIODE/PENTODE switch), effectively eliminating the screen’s 

“useful” effect from the circuit. This “false-triode” mode effectively makes the circuit (including the tube itself) behave 

as a power triode. The high frequency character changes, the output impedance changes, and the circuit’s efficiency 

decreases just as one would expect from a power triode output circuit.  This provides the mellower/darker   

complexity of the amp in the Triode mode.  This is a personal choice that is available to you on the El Diablo 60 and 

provides you the flexibility for further experimentation in tone.

 


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SPEAKER CABINET (combo version)

•  The El Diablo 60 combo’s enclosure is constructed from ¾” birch plywood in a rear-ported cabinet design.  This    

   helps to support the low frequency response of the internal loudspeaker. 

•  The loudspeaker is our GBE 1240-V75 loudspeaker—the same model used in our popular GFLEX cabinets.  

•  The combo offers a removable back if desired, but we recommend keeping the back attached for the full response  

   of the El Diablo 60’s brute force.

GETTING STARTED:

•  Since your EL DIABLO 60 ships with all tubes installed and the amplifier fully tested, biased and burned-in at the  

   factory, the user set-up is quite simple.

•  Un-box your EL DIABLO and verify that the AC input voltage selector switch matches the power in your area. 

•  Verify that you have the correct mains cord-set for your area. This piece of information is primarily for our  

  

   international customers who may have a choice of power receptacles in their country.

•  Make sure to send in your warranty registration card.

•  Read your owner’s manual.  There is valuable information and safety tips in this manual and the knowledge you  

   learn here will translate into enjoyable quality tone for years to come.

OPERATING EXAMPLES:

The sample settings that follow are intended as guidelines and a starting place to help you explore all the tones your 

new El Diablo has to offer.

Ultimately, your guitar, pickups and technique will have a tremendous effect on your tone; adjust these settings to 

suit your own unique style.  Please remember though, your El Diablo has a highly reactive EQ section.  The controls 

have detents to encourage the player to use subtle adjustments.  You will be amazed how a “few clicks” will change 

the tone and feel of your amp.

DROP TUNING

 

 

 

 

(Pentode Mode)

High gain, modern metal

8

WARNINGS:  

· 

POWER TUBES BECOME VERY HOT DURING AND AFTER BEING USED. 

· 

NEVER CHANGE THE POWER TUBES UNTIL THEY HAVE COOLED FOR AT LEAST 15 MINUTES.

· 

NEVER CHANGE THE TUBES WITH THE AMP ON!!!

· 

DANGEROUS AND/OR LETHAL HIGH VOLTAGES ARE PRESENT INSIDE THE AMPLIFIER CHASSIS.   

 

REFER ALL SERVICING TO QUALIFIED SERVICE PERSONS.

For a push-pull output stage (tube amps), the scenario is different, since one tube amplifies the positive “going” 

portion of the signal and the other tube amplifies the negative “going” portion of the signal.  In fact, if the world was 

perfect, we would need no bias since the positive side of zero would be handled completely by one tube and the 

negative side of zero would be handled completely by the other tube. This would be the proper definition of “class 

B operation”.  Since tubes are not perfect devices, the transition at zero is not very linear… as one tube turns off, 

the other tube may not be quite ready to turn on.  This can lead to a discontinuity of the signal around zero which is 

the worst possible place for it to occur—as it is highly audible and rather ugly sounding.  The solution once again is 

to bias both tubes slightly “on” to allow for a more graceful handoff between the positive and negative sides of the 

signal, called “AB operation”.  This is done by adjusting the bias just enough to achieve the necessary results.  Too 

much bias and current will be wasted as heat dissipates within the power tubes and output transformer, greatly  

shortening your power tube’s useful life.  Too little bias may give the amp a cold, grainy texture. 

 


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INDUSTRIAL

 

 

 

 

(Pentode Mode)

Tight grind with edge

CLASSIC EDGE “BROWN” SOUND

 

(Pentode Mode)

Need we say more?

HI-GAIN BRITTISH STACK

 

 

 

(Pentode Mode)

“BLACK MAGIC WOMAN”

 

 

 

(Triode Mode)

Warm and vocal solo time

BLACK FACE WARMTH   

 

 

(Triode Mode)

Setting is very touch sensitive-Dig in for a nice break-up

CRUNCH RHYTHM  

 

 

 

(Pentode Mode)

Turn up the master for tons of bark and grind

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TUBE COMPLIMENT

 (as shipped):

SPANK & SPARKLE 

 

 

 

(Pentode Mode)

Add a touch of reverb for a Chicago blues tone

0

WARM JAZZ  

 

 

 

 

(Pentode Mode)

WOOLY BLUES 

 

 

 

 

(Triode Mode)

Great vintage blues overdrive

HOT BLUES  

 

 

 

 

(Pentode Mode)

Expressive lead tone with gain clarity

TEXAS THING 

 

 

 

 

(Pentode Mode)

Big and gritty

 ea. 2AX7CZ 

(Tesla/JJ)

2 ea. 2AX7AC4 

(Ruby Tubes™)

2 x EL 34 

(RubyTubes™) 

 


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CHANGING TUBES:

Always use caution when changing tubes.  The power switch on the amplifier should be turned off and the power 

cable unplugged from the source. 

 

CHANGING POWER TUBES - The tubes should be cool.  When changing the power amp tubes slip off the spring-

loaded silver tube retainer and carefully work the tubes out of the ceramic socket by pulling down while rocking 

the tube slightly and gently. When re-installing power tubes, note that both the tube base and the pin positions are 

“keyed” to the socket.  Make sure that you seat the tube base properly in the socket and carefully push it tight into 

the socket.  Confirm that the BIAS SWITCH is in the correct position for the type of power tubes being used.

CHANGING PREAMP TUBES - The tubes should be cool. Each preamp tube is secured with a special tube retainer 

that keeps the tube seated properly and also helps to counter-act unwanted tube micro-phonics.  A small Phillips 

screwdriver will be needed to unscrew the round tube retainer.  After this retainer has been removed, rock the tube 

slightly and gently while pulling up on the tube and remove it carefully.  When re-installing preamp tubes, note that 

the pin positions are “keyed” to the socket.  Make sure that you seat the tube pins properly in the socket and care-

fully push it tight into the socket.  Reattach the round tube retainer.  Make sure the rubber grommet inside the tube 

retainer securely holds down the preamp tube.  

Important note:  It is critical to the optimum performance of the El Diablo 60 that a premium high grade 

12AX7 tube is used for the first tube in the signal chain (located directly behind the input jack).  This tube 

must be selected for its very low micro-phonic content in order to minimize high gain feedback or squeal in 

the Hot channel when using maximum gain settings at high volumes.

OUTPUT TUBE BIAS – Refer to the Tube Bias Section listed previously in this owner’s manual.

SPECIFICATIONS: (All Models)

RATED OUTPUT POWER:

2 x EL 34 power tubes: Pentode 60 watts / Triode 30 watts

2 x 6L6 power tubes: Pentode 50 watts / Triode 25 watts

POWER CONSUMPTION:

350 watts max.

FUSES:

Main power fuse (rear panel): 3 amp Slo Blo (00v, 5v), .5 amp Slo Blo (230 v)

Power tube heater fuse (internal): 3 amp Slo Blo

WARNING!

• The use and operation of this device constitutes an agreement of full release of any and all liability connected with

  its use. Only persons familiar with the operation of high-powered professional audio equipment should attempt to

  operate this device.

• In addition, by use of this device, the user agrees to hold Genz Benz and its designers, sales agents, and all other

  affiliates and related parties harmless in the event of any accident, injury, damage or loss resulting from such use.

• Manufacturer’s sole responsibility is to provide a warranty on the specified performance of the product under normal

  operating conditions for a period of 3 years.

 


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Declaration of Conformity

(89/336 EEC-EMC Directive)

Manufacturer’s Name:  

 

Genz Benz, a division of KMC Music Corporation

Manufacturer’s Address: 

 

78 East Pierce Street

 

 

 

 

 

Scottsdale, AZ 85287, U.S.A.

Product Type:   

 

 

Audio Amplifier

Model Number: 

 

 

ELDIABLO60, ELDIABLO60-C, ELDIABLO60-TS

Operating Power Condition:   

5/230 V, 50/60 Hz

Effective Date:  

 

 

0-0-2006

Conforms to the Following Standards: 

 

[X]  EN 5503: 200 + A: 2003

 

 

 

 

 

 

 

[X]  EN 55020: 2002 + A: 2003

 

 

 

 

 

 

 

[X]  EN 60065

 

 

 

 

 

 

 

[X]  IEC 6000-3.3: 994 + A: 200

 

 

 

 

 

 

 

[X]  IEC 6000-4.2

 

 

 

 

 

 

 

[X]  IEC 6000-4.3

 

 

 

 

 

 

 

[X]  IEC 6000-4.4

 

 

 

 

 

 

 

[  ]  FCC 47CFR Part 5-B, Class B

 

 

 

 

 

 

 

[X]  RoHS Directive 2002/95/EC

 

 

 

 

 

 

 

[X]  WEEE Directive 2002/96/EC

 

 

 

 

 

 

 

[X]  CE Mark LV Directive 73/23 EEC

78 E. Pierce Street, Scottsdale, AZ  85257

PH: 480-94-0705  FAX: 480-946-242

www.genzbenz.com

A KMC Music Corporation Company, Bloomfield, CT

REV 4

2

SAFE OPERATING REQUIREMENTS:

• Never set an amplifier on anything that will tip over or collapse under its weight.

• Provide a minimum distance of  25.4 mm (1 inch) around all sides of the amplifier for sufficient ventilation.  The 

  ventilation should not be impeded by covering the amplifier’s vent openings with items such as newspapers, table

  cloths, curtains, etc.

• No naked flame sources, such as lighted candles, should be placed on the El Diablo 60 amplifier.

• This amplifier should not be exposed to dripping or splashing and no objects filled with liquids, such as vases or drinks,

  should be placed on this product.

• The El Diablo 60  amplifier should be connected to a mains socket outlet (power receptacle) with a protective earth

  (ground) connection at all times.

• The amplifiers mains plug (power plug) is considered the disconnect device and the connection must remain acces-

  sible at all times.

• This amplifier is capable of producing sound pressure levels that may cause hearing loss.

• There are no user serviceable parts and hazardous operating voltages are present inside this unit. Always consult a

  qualified repair facility for service.

THREE YEAR LIMITED WARRANTY

TRANSFERABLE

Genz Benz warrants the EL DIABLO 60 to be free from defects in materials and workmanship, for a period of 3 years 

from the date of purchase, when purchased from an authorized 

Genz Benz dealer. 

Tubes are warranted for a period of 6 months from the date of purchase.  

Visit www.genzbenz.com for complete warranty information.

Genz Benz and El Diablo are trademarks of Genz Benz/KMC Music