User Manual Diezel Einstein Amplifier
Table of Contents
Chapter One: Safety and Warranty
1.1 Safety Warnings
1.2 Warranty information
Chapter Two: Using your Einstein
2.1 Mains Connections, power and Standby
2.1.1 Mains/connect to power outlet
2.1.2 Power up, Warm up, Standby off
2.1.3 Power tube caution
2.1.4 Operating Temperature
2.1.5 Power Tube Information
Chapter Three: Peripheral Connections
3.1 Front Panel Connections
3.1.1 Signal In
3.1.2 Connection Information
3.1.3 Cable Selection
3.2 Rear Panel Connections
3.2.1 Send/Return Loop
3.2.2 Parallel and Serial Return
3.2.3 Reasons for Dynamic Losses in the Effects Loop
3.2.4 Compensated Out
3.2.5 Speaker Connections
Chapter Four: The Two Pre-Amplifiers
4.1 Pre-Amplifier Duties
4.1.1 Channel One
4.1.2 Channel Two
4.2 Pre-Amplifier Tubes
4.2.1 Noise and Microphonics
Chapter Five: Power Amplifier
5.1 Tone and Volume of the Power Amplifier
5.1.1 Master Volume
5.1.2 Presence
5.1.3 Deep
5.2 Power Amplifier Tubes
5.2.1 Function 5.2.2 Selection
5.2.3 Life Span
Chapter Six: Functions and Switches
6.1 Channel Selection
6.2 Master 2 on/off
6.3 Channels
Chapter Seven: Maintenance and Cleaning
7.1 Cleaning
7.2 Care
7.3 Tube Change
Chapter One: Safety and Warranty
1.1 Safety warnings
We would like to stress the importance of the following points, for reasons of
your personal safety, product longevity and product liability.
Do not use the Amplifier in or near wet locations
Do not store the Amplifier in damp or wet locations
Do not operate the Amplifier on voltages other than those designated on the rear
panel of the amplifier.
Do not open the panels of the amplifier. No user serviceable parts inside. Your
Einstein operates on very high internal voltages, which may still be present after the
Amplifier has been turned off and disconnected for awhile.
Do not use the Amplifier for anything other than its designed purpose: To Amplify
Electric Guitar Signals
Do not use fuses other than those intended and specified for the Amplifier
Do not use 2-conductor extension cords or anything other than 3-polegrounded
outlets for this appliance. Your life may depend on it!
Please observe the following points when transporting your Einstein:
Einstein is a tube-powered amplifier; therefore it is sensitive to shock especially after
playing the amplifier for a while. Please store and transport your amplifier gently and
try to avoid extreme temperatures, which might produce condensation,resulting in
moisture on internal components. Usually a 60 Minute acclimatization period is
sufficient to ensure safe operation.The amplifier should be stored in a controlled
environment, and it should be transported in a suitable flight case. Make sure the
amplifier gets transported in its normal operating position, not upside down or on its
side.The Einstein’s design incorporates a very potent power amplifier. It is configured
to deliver satisfying guitar tones at most volume levels. In its normal operational
volume level (75-80dB) it will provide beautiful tones with very little coloration. For
reasons of your own safety, please do not run the amplifier above these levels for
extended periods of time without wearing a hearing protection. Hearing Loss is a
long-term ailment, and is not normally curable.
1.2 Warranty
5 years to the original owner with proof of purchase. Power Tubes and Pre Amp tubes
are covered for 3 months to the original owner. The amps will be tracked via both
Diezel USA and Diezel Germany recorded sales beginning 1/20/2009. ALL REPAIR
procedure will VOID WARRANTY. This will ensure the the original owner and us at
Diezel Amplification that the work is done correctly and that there is knowledge of
what is going on out there with each amp. To any second owners or more, there is no
warranty coverage nor is a warranty transferable. (This policy is no different then
before). Of course we at Diezel are happy to serve people who purchase their
amplifier on the used market should your amp ever need servicing. Parts and labor
charges will occur for our work on your amplifier as usual.
If you purchased your amp before 1/20/2009 you are categorized under the same
guidelines as when you purchased your amp (Lifetime warranty for the original owner,
1 year transferrable warranty).
Chapter Two: Using Your Einstein
2.1 Mains Connections, Power and Standby
2.1.1 Mains/Connection to Power Outlet
Please make sure that both switches (Power and Standby) are in the off position
before connecting to the mains circuit. Verify line voltage before connecting the
power cord. Never start Einstein without connecting speakers to the proper
terminals. (See 3.2.5)
2.1.2 Power up, Warm up, Standby off
First, turn the Power switch to on (facing up). The indicator light will turn on.This
starts the tube heating process. After about 40 seconds, the tubes should be
sufficiently heated for normal operation. Your Einstein is then ready for operation and
the standby switch can be turned to “run” (also facing up). Premature activation of
the standby switch will lead to unnecessary tube stress and subsequent reduction of
the power tube’s life span.
2.1.3 Power Tube Caution
Tubes are electronic components that function only with vacuum intact and under
very high operating temperatures. Each tube has one or more heating filaments,much
like a light bulb. These filaments heat up the anode of the tube. If you switch the
standby switch to the “run” position before these anodes have reached their operating
temperature (when the anode surfaces are not heated evenly), this causes undue
stress to the tubes and their related components inside the amp. Always give the amp
its much needed warm-up time, even if musical inspiration hits you with a full force.
2.1.4 Operating Temperature
It will take a little more time after warm-up until everything inside the amp is working
in sync and to its fullest potential. A trained ear will notice a slightly warmer tone and
better complexity in tone after playing the amp for a short while. It’s like stretching
before exercising.
2.1.5 Power Tube Life
The power tubes of your amplifier are subjected to a certain aging process. Once
signs of aging, such as unreliability or unusual noise, are detected, we suggest that
you replace all power tubes at once. Matched tube sets age relatively evenly, so our
experience suggests. This means that if one goes, the others are not far from meeting
the same fate. The aging process manifests itself by a depletion of a thin layer of
wolfram on the anodes. This can take anywhere from 6 month to 3 years, depending
on the amount of use of the amplifier.
Chapter Three: Peripheral Connections
Front Panel Connections
3.1.1 Input Jack
The input jack (“IN”) receives your Electric Guitar signal by means of a shielded
guitar cord with 1/4” mono style plug.
Your guitar cord is an important part of your signal chain and its quality and
construction type clearly affect the overall tone of your rig. Try and buy the best
quality guitar cord that you can or want to afford. Call us if you have doubts and
need recommendations. This is where the smart “weak link” comment comes in.
3.1.2 Cable ABC
Some cords and cables sound very neutral; others color the sound spectrum and/or
attenuate high frequencies due to capacitance inside the wire and the shield. What
are we talking about? OK. A capacitor is used in electronic crossovers, amongst other
things, to divide low and high frequencies. Capacitance in a cable cuts your guitar’s
high end to a certain degree. Generally, the longer of a cord you use, the more of the
cord’s inherent characteristics will be audible.
3.1.3 Cable Selection
In certain circumstances, it is desirable to match a guitar cord to a specific
instrument. One may use the otherwise undesirable qualities of a cord to one’s
advantage, if one has the time and patience to experiment with different cords and
guitars. This should be done while playing with your band, or while recording.
Sometimes it is difficult to tell a component’s true advantages until it is used in the
right context.A guitar that has very piercing highs could theoretically be tamed down
somewhat by using a long guitar cord that offers some high-end attenuation. The
loops of your Einstein send signals at higher levels and impedances, which makes this
section of wiring less sensitive. You should still use reliable and good quality wiring for
all loops.
3.2 Rear Panel Connections
3.2.1 Send/Return Loop
The system consists of 2 separate Loops. It allows creation of effects path in either
serial or parallel configurations. The individual channel volume controls determine the
signal strength at the send jacks. The range is ... to +10dB. The output impedance is
4.7 kΩ. To use the Send/Return Loops, connect the “Send” to the “return” or “input”
or “in” of the effects unit. Be sure to adjust the input level of the effects unit to the
amplifiers level. Most effects units have led bar or other level control devices. The
Output of the effects unit must be connected to one of the return jacks, parallel,, or
serial. If you use the parallel return, then the signal can be mixed to the original
signal via the rear panel mounted “Volume” control.
3.2.2 Parallel or Serial
Which is better for you? Read on. There are 2 ways to handle effects signals. The
serial loop interrupts the signal path of the Einstein and the signal is sent to the
processor, becomes processed, then sent back to the serial return into the power
amp. Digital effects units often digitize this signal once received, then process the
signal, convert it back to analog, then send it to the amp. This is called ADA (analog
digital analog) conversion. It is necessary for digital effects units digitize your guitar
signal so that the processor can read and understand signal. Your tubes, however,
need an analog signal to operate, so the processor converts the signal back to analog
before it goes back to the amp. Generally, even in highest quality effects processors,
this causes a change in the original signal, typically a loss of tonality and warmth, also
noticeable as a “harder” sound. When you use the serial loop for an effects unit like
this, then your signal will have been ADA converted at least once. Tone junkies and
vintage freaks alike will more than likely have hives developing by now. But - as
always, there is a better way. Use the Parallel loop and the Volume control in the rear
determines how much effect signal is being added to the original signal, which now
still flows through the amplifier. There is always an analog connection between the
send and return jacks; a parallel loop! Important: You must set the mix control on the
effects unit to 100% wet when using the parallel loop. Otherwise there will be nasty
phasing problems resulting in unsatisfactory tone. The signal portion that is
unaffected by the mix control in the effects unit would reach the amplifier at a
different time due to the cabling, and cause phasing cancellations.
3.2.3 Top 5 Reasons for dynamic losses in the effects loop
Many different factors can be responsible for loss of dynamics, aside from those
mentioned in 3.2.2 (ADA conversion). A vital point that often leads to frustrationis a
maladjusted output level of an effects unit. If the output level is too high, the unit will
cause unwanted distortion in the power amp. If it is too low, then the rig
will not sound punchy and might get lost in the band sound. When used in the serial
loop, the output of the effects unit determines the ultimate drive signal strength of
the power amp. The output level should be matched to give the best possible sound
with all channels without over driving the power amp section. (Unless this is desired
for power amp distortion) Headroom adjustments of 10% are usually sufficient.
3.2.4 Compensated Out
A frequency corrected signal will leave this jack if you connect it to a mixer or
recording device. Use it to quietly compose or send an auxiliary signal to a console
etc. Always make sure that your amp is hooked to either a speaker or a load (i.e. THD
Hot Plate).
3.2.5 Speaker Connections
Einstein has 5 speaker jacks. 1 for a 16Ohm load, 2 for 2 16Ohm loads or 1
8Ohm load, and 2 for 2 8 Ohm loads or 1 4 Ohm load. Confusing? Oh yes! Just
do what it says on the jacks, and you’ll be fine
Chapter Four: Two Pre-Amplifiers
4.1 Pre-Amplifiers and their Jobs
The Diezel Einstein comes equipped with 2 different and totally independent preamps.
This allows the artist to play through nearly all musical-styles without having to make
major changes to his/her amplifier. The preamps are voiced todeliver the most
wanted guitar tone flavors: Clean, Crunch, Heavy, Lead. This design concept delivers
stellar guitar sounds with excellent playability, warm dynamics and razor sharp
equalization possibilities. The tone controls work in an unusually wide range, so a little
adjustment does quite a lot. As with so many things, less is often more. We suggest
you start exploring the channels with all controls set to 12:00 o’clock, and the master
volume just slightly cracked open. (To avoid hearing damage)
4.1.1 Channel One (low to medium gain)
Clean Tone is a very sensitive subject, because there are so many different ideas on
how a clean amp should sound like. Clean tonal textures require much higher
dynamic range than distorted sounds. From hard and percussive sounds to soft,
warm, and blossoming tone. Einstein was designed to offer as many of the clean
varieties as possible. Your choice of guitars and pickups will have a large part in this
Channel one has three modes, selectable by a toggle switch near the channel one
gain knob. The modes pre-select different gain stages in the pre-amp, allowing this
channel to span the range from extreme clean to a heavy crunch. A player that does
not require a clean channel can use these modes for alternate distortion sounds.
4.1.2 Channel Two (high gain)
This channel is voiced for single notes, or for very heavy and massive rhythm
guitar. Due to its slight midrange accent and very high gain, it possesses a good
punch, will play with ease, and gain authority to rule any stage, or studio. The “less
is often more” rule applies here also.
4.2 Pre-amplifier Tubes
The pre-amps are equipped with 12AX7 tubes in all positions. The pre-amp tubes are
not designed to produce high power output. Therefore, their life expectancy ismuch
higher than that of the power amplifier tubes. This is not to undermine their utter
importance in overall sound and response ofthe amplifier. Also, annoying defects like
crackling noises and low dynamics are directly related to defective pre-amp tubes.
Like all other tubes, 12AX7 tubes come in many different gain stages, and offer a
wide variety of tonal behavior. Our choice for production was made to ensure a wide
variety of tones, with low noise and good reliability.
4.2.1 Microphonics and Bad Noises
The overall performance of pre-amp tubes is easily influenced by external
mechanical factors. Malfunction in these external components will manifest
themselves by a sudden, high-pitched feedback sound. The input stage is especially
suspect to these phenomena. If one encounters microphonic tube behavior, then the
first tube should be checked as a rule. Pre-Amplifier tubes can also cause a hum or
other bad noises, like crackling or ticking.
Chapter Five: Power Amplifier
5.1 Tone and Volume of the Power Amplifier
5.1.1 Master Volume
As the name suggests, this controls the overall, volume of the amplifier. There is also
a second, selectable master volume control, which allows volume adjustments via
remote control device while playing.
5.1.2 Presence
The presence knob controls frequencies over 3kHz. Treble is produced and dispersed
in a very small beam from the speaker, so be sure to position yourself in the
projection area of the speaker when making adjustments.
5.1.3 Deep
The Deep Control is an active bass control contrary to conventional bass controls. It
controls the frequencies around 120Hz without influencing the overall dynamic range
of the power amplifier. Diezel Co. is not responsible for disintegrating speaker
5.2 Power Amplifier Tubes
5.2.1 Function
As the name suggests, the power amp section is the part of the amplifier that
produces output power, measured in watts. Preamp signals are sent to the
poweramp(s), which amplifies this signal to a level that is acceptable for
loudspeakers. Guitar amplifiers utilize several different types of power amps, which
differ in output power and tone. We chose the tube type power amplifier for its tried
and true performance and familiar tonal behavior.
5.2.2 Selection
Diezel Co. installs the most reliable and best sounding tubes that are currently
available in sufficient quantities. So it is possible that tube brand and tube typewill
change during production. You can fine-tune your Einstein by having different type
and brands of tubes installed, however, it is imperative that the amp is biased
properly. Einstein utilizes 4 power tubes, organized in 2 pairs with dual bias
possibility. This allows use of 2 different pairs of power tubes, either the same or the
different types.
5.2.3 Life Span
Power tubes last 1 to 3 years, depending on care, volume and frequency of use of
the amplifier. If you use your amp only once a month, then the tubes will last much
longer. Really. We have heard tubes that are over 10 years old, but it was not a
good thing. Tubes age very slowly; slow enough for the artist to get used tothe
changing tone. To keep things fresh, and to keep your tube dealer in business, we
recommend re-tubing, cleaning and biasing once a year if the amp is used
Chapter Six: Layout of Controls
6.1 Manual Channel Selection
The 2 channels of the Einstein can be selected manually by activating the select
switch for either channel. Alternatively, a foot switch can be connected to remotely
control the channel selection.
6.2 Master 2 On/Off
Master 2 can be used for all channels, and can also be remotely controlled via the
included foot switch. This allows instant volume boost, or cut, without fiddling with
the amp. Once adjusted to suit your needs for the gig, it’s a thing of pure beauty. You
can select the Master 2 function via the Diezel 2-button foot switch. Actually, you can
also use a readily available single button foot switch with a 1/4”connector.
6.3 Channels
• Channel One
Control perimeters include Gain, Volume, Treble, Mid, and Bass. A 3-positiontoggle
switch selects preset gain modes.
• Channel Two
Control perimeters include Gain, Volume, Treble, Mid, and Bass. This channel can
be selected via the toggle switch, or via the Diezel 2-button foot switch.
6.4 Effects Mix control Rear panel
This control determines the amount of effect signal in the parallel loop
Chapter Seven: Maintenance and Cleaning
7.1 Cleaning
Never use anything wet to clean the amplifier, any amplifier. Usually, it issufficient to
wipe down the outside of the amp with a slightly moist cleaning rag. Do not use
abrasive cleaning chemicals. Sometimes a vacuum cleaner can be usedto remove dust
and dirt from nooks and crevices. Do not remove the chassis from the housing to
clean the amp; the inside of your amp carries dangerous Voltages.
7.2 Care
Be gentle with this Amplifier. Any mechanical shocks, extreme temperature changes,
damp environments, and other extreme conditions (dust, wind) can substantially
shorten tube life. In some cases, even the amplifier life. Do not block the air
circulation grilles in the front and in the back of the amp. Do not push the amp right
up against objects that would interfere with its normal airflow. The top of the
amplifier might get warm after a prolonged use; this is normal, but will melt your ice
cream and definitely ruin your beer. Never put beverages on top of the amp where
they could spill and flow inside the amplifier. Will you rue the loss of your beverage
first or the loss of your amplifier?
7.3 Tube Change
Tube changes are only to be performed by authorized service personnel. If power
tubes with different values than the stock tubes are to be installed, then the amplifier
must be re-biased before operation can be resumed. The amplifier uses atwo circuit
bias system. It is quick and easy to accomplish biasing but were commend that you
refer to trained professionals to attempt this procedure.
The Diezel Company wishes to express their gratitude and
congratulate you on your decision to purchase the Diezel
Einstein Amplifier.