Engl E670 Operator's Manual
Operator´s Manual
Please, first read this manual carefully!
Full Tube
Guitar Amplifier
with MIDI-Control
Special Edition
Tube
Amp
Technology
Tube
Amp
Technology
R
R
Table of Contents
page
Introduction
Features and Functionality at a Glance
Contents
Front Panel Features:
Rear Panel Features:
Practical Info and Tips
Glossary,
Troubleshooting
Technical Data,
Tube Map, Tube Exchange Service
Mains Configuration
Wiring of Principal Connectors
Remote Control Options
Front Panel Diagrams for Noting Settings
Front Panel and Rear Panel Layout
Note:
:
BIAS-Control-Panel
Handling and Care
Tube Driver; Clean and Crunch Channel Control Features
Power Amp EQ: Presence A/B, Depth Boost
Mega Lo Punch, Reverb, FX Loops
Input; Lead I and Lead II Channel Control Features
Power Amp section: Master A/B
Modern/Classic, Lo/Hi Power, Speaker A/B
Noise Gate
Write/Copy
Stand By, Power
Mains, Mains Fuse
MIDI Section and Footswitch Ports
Detailed Specifications and Ratings
You'll find an ancillary pamphlet accompanying this owner's manual entitled
Instructions for the Prevention of Fire, Electrical Shock and Injury. Be sure to read it
before you plug in and power up the amp!
Technical specifications are subject to change without notice.
Noise Gate: Mute Depth, Threshold Level
FX Loops I, II and Serial: Send, Return, and Balance
Balanced Line Out: Level, Overload LED, Line Out Status,
XLR Ground, Line Output Frequ. Comp.
Power Amp Output B: B1, B2, Impedance Selector
Power Amp Output A: A1, A2, Impedance Selector
Ground Lift Switch
Tube Driver: Level, Contour, Bass, Mid, Treble, Sensitivity
Impedance Check System
Checking and Adjusting Bias
CAUTION! Please read and heed the following:
Status-LED: Indications
4
4,5
6
6 - 10
10,11
11,12
12 - 15
15, 16
16, 17
18
19
20
21
21 - 23
23, 24
24, 25
25, 26
26, 27
27, 28
28
29
29 - 31
31 - 33
32, 33
33 - 37
38
39, 40
40, 41
42
43
44, 45
46
47
48
49
3
Congratulations! SpecialEditionE670 most
advanced versatileampheads
sophisticated guitar amp all-tube technology
state-of-the-art
microchip circuitry a vast range of
great fundamental tones
controlledremotelyviaMIDI
ease of use remarkably intuitive
handling
excellent sound-shaping options greatest flexibility
a gigging workhorse
studio home recording
finely-tweaked, MIDI controllable sound-shaping functions
wealth of disparate sounds
four basic sounds , , and
switching power amp output on the fly
ultra-advanced tone-generating machine
playing pleasure value to boot
Four basic channels
Tube Driver circuit
Modern and Classic sound-shaping buttons
Two Gain variants
Three voicing sections
Withthe ,younowownoneofthe
and availabletoday!
This marries the unrivalled tone of to
the awesome sound-shaping might of control features powered by
. This elegant combination puts at your fingertips
and an all but inexhaustible reservoir of compelling
variations allofwhichmaybe .
What's more, the amp boastsa host of hip & practical features a bias switch that lets
yourun6L6GCorEL34 power amp tubes and
;a quick-check systemfor speaker impedance
and cords equipped with1/4 " jack plug; and three different types of FX loops, to
mentionjust afew.
1. a logical control feature array, utmost and
;
2. and courtesy of the many
voicing options and special features, and 128 MIDI presets offering a bevy of
programming options;
3. that also sports a speaker simulation system, making it
a handy tool for and ;
4. a combination of
providing instant access to a ;
5. the ; with two variable and
switchable Gain levels and two voicing options ( and )
for each basic sound, you actually have 16 fundamental sounds to choose from;
6. the option of . The ability to go from
Hi Power (100 watts) to Lo Power (50 watts) via MIDI while playing is yet
another novel sound-sculpting tool that you have at your disposal!
7. an that will give you years of
and .
-> : , , and with separate Gain, Treble
and Volume knobs.
-> for effect devices; it also serves as a separate fifth channel
that can be selected directly (with or without EQ) in reciprocation with the four
channels.
-> : Determine the basic voicing of
all four channels, giving you a broader, deeper tonal spectrum to work with.
-> for each of the basic channels: and
let you active directly two different gain settings for every channel.
> : one EQ for and (Main Channel 1),
one for and (Main Channel 2) and another for the .
As a special feature, every channel sports a dedicated Treble knob.
This affords you:
Features and Functionality at a Glance
Clean Crunch Lead I Lead II
Modern Classic
Clean Crunch Lead I Lead II
Gain Boost Hi Gain
Clean Crunch
Lead I Lead II Tube Driver
-
abiasindicatorthatlets technician know
whichconfiguration is currentlyselected
4
-> tuned to match the tonal requirements of
the given channels: and for and ,
and for the two Lead channels.
-> for very natural-sounding reverb, with separate
knobs for the two Main Channels.
-> and are variable, switchable effect
loops, while in series
with two main effect loops. Each effect loop may be activated for each channel
as well as for the circuit.
Various sound-shaping buttons
Large spring reverb
Three effect loops:
Bright Ultra Bright Clean Crunch
Contour Mid Edge
FX Loop I FX Loop II
Serial FX Loop
Tube Driver
-> , accessible via MIDI.
The amp can also be muted via MIDI controller 7.
-> (50 or 100 watts) with hot
impedance adjustment (that is, on the fly); with
separate impedance selector for connected speaker systems.
-> for routing preamp or
power amp signals to mixers or recording gear.
-> and ports serve to integrate the amp into a MIDI system.
-> , accessible via 16 MIDI channels.
-> The
The Serial Amp Control Port accepts the Custom Z-9 Footswitch (optional); use it
as a conventional switcher to select channels and two sound-shaping functions
directly. Then there's the MIDI In, which accepts the Z-9 for use as a simple MIDI
footcontroller or any other MIDI footcontroller. Finally, the amp is equipped with
a stereo jack that takes a dual footswitch, allowing you to switch the four
channels remotely.
-> for suppressing noise in the ,
and channels.
Among the hallmarks of this fine amp are painstaking workmanship and finishing as
well as rigorously tested and carefully selected quality components. You'll find
guidelinesoncareandmaintenance of tube amps onpage41.Underthe heading Tips
from the designer, you'll come across practical tips on the aforementioned features
throughout the manual. All critical information concerning the operation of this amp
is preceded by "NOTE", "CAUTION", "Read and heed" or some other eye-catching
comment.We're callingyour attention to these remarks for reasons of safety or other
compellingmotives, sopleasegivethem dueconsideration.
Everyone at ENGL is confident that the
and aresure to delightyou:
Though this amp head is relatively easy to handle and you're probably raring to give it
a go, I recommend that you read the owner's manual thoroughly before youpower it
up. It is equipped with several safety features that require further explanation to
preventmalfunctions.
Variable, MIDI-switchable power amp output
A/B speaker switching
Balanced, frequency-compensated XLR line output
128 MIDI presets
Special Edition offers three different remote interface ports:
Programmable Noise Gate
Special Edition tube amp's extraordinary
versatility outstanding features Simply plug in, play and
beinspired by thetoneof your ENGLamp!
Afew words ofwisdomfrom the designer:
MIDI In Thru
Crunch Lead I
Lead II
is a separate circuit that can be used
Two each power amp Master and Presence knobs
is a separate circuit that can be used
Two each power amp Master and Presence knobs
5
Contents:
Front Panel Features
1. ENGL E670 Tube Amp Head;
2. mains cord;
3. this manual;
4. a pamphlet entitled
.
At the back of the manual, you'll find fold-out diagrams of the front and rear panels.
As you're reading the descriptions of the amp's features, you'll gain a better
understandingof thetopicofdiscussion ifyouunfoldand refertothemaswego!
Activates the onboard , a circuit similar to a very simple preamp channel.
Think of it as an active, tube-driven preamp defeat circuit. Pressing this button (1)
activates the . Note that this circuit can be selected in reciprocation with
thefourchannels, whereby reciprocationmeansthat you canactivatethe
irrespective of the currently active channel and vice versa. The LED above the button
lightsuptoindicate the is active. It can alsobeactivatedvia MIDI program
changeor CustomZ-9Footswitch.Its controlfeaturesareonthebackoftheamp.
Thisnew featureoffersacouple ofcoolapplicationoptions:
1. Use it as a pre effect device tube preamp stage (two triode stages) to enhance the
dynamicrange ofyour instrument'ssignal. Theinternal preampand its , ,
and channels arebypassed,and a practically linearsignalisrouted to the
effectsend jacks.
This lets you employ the without EQ as a preamp defeat or bypass, for
example,if youwanttouse aneffectdevice'spreamp stagetodrivethepoweramp.
2.Use it as an independent fifth preampchannel without tone controls toget asignal
with very nearly linear characteristics. When you activate the without EQ,
solely the power amp Presence knob and Depth Boost feature influence your the
sound, giving you yet another tonal alternative to the Clean channel. Use the rear
panel Sensitivity (85) and Level (80) knobs to set gain and volume levels, or the effect
loops' send levels, for the activated Tube Driver channel. You can saturate the Tube
Driver circuit by dialing in higher gain settings (depending on your guitar's pickup).
Thisgives youanotherdefacto Crunchchannelwithtotallydifferenttonalproperties!
that because this circuit takes a direct path from input to the effect loop,
you cannot use the amp's preamp control features to shape its signal. The list of
disabled features includes (22), (21), the (45)
and (42). Power amp functions such as , ,
(20), (43) and (44) remain enabled and have
thesame effectonthe astheywouldonanyotherpreampchannel.
Instructions for the Prevention of Fire,
Electrical Shock and Injury
Tube Driver
Tube Driver
TubeDriver
TubeDriver
Clean Crunch
LeadI LeadII
Tube Driver
Tube Driver
Reverb Mega Depth Punch Noise Gate
Modern/Classic Master A/B Presence A/B
Depth Boost Power Lo/Hi Speaker A/B
TubeDriver
A tip from the designer:
Please note
1 TUBE DRIVER
6
2 T.D.EQ.(TUBE DRIVER EQUALIZER)
3CLEAN GAIN
4GAIN BOOST
This function activates the onboard , a circuit similar to a very simple
preamp channel. It could also be described as an active, tube-driven preamp defeat
circuit, in this case with passive tone controls. Pressing the button (2) activates the
with EQ. Note that this circuit can be selected in reciprocation with the
fourchannels,wherebyreciprocationmeans that you can activateitirrespectiveofthe
currentlyactive channel and viceversa. The LEDabove the buttonlightsup to indicate
the Tube Driver plus EQ is active. The Tube Driver with EQ can also be activated via
MIDI program change or Custom Z-9 Footswitch. Its voicing knobs are on the back of
theamp.
Thisnew featureoffersacouple ofcoolapplicationoptions:
1. Use it as a pre effect device tube preamp stage (two triode stages) to enhance the
dynamicrange ofyour instrument'ssignal. Theinternal preampand itsClean, Crunch,
LeadI andLeadIIchannels arebypassed.
This lets you employ the with EQ as a preamp defeat or bypass, for
example, if you want to use an effect device's preamp stage to drive the power amp,
andtoshapetheTubeDriversignal totasteusingthepassive three-wayvoicingsection
onthe rearpanel.
2. Use it as an independent sixth preamp channel with dedicated tone controls.
Becausethis circuitfeatures adifferent design as well as independent voicing options,
it gives you yet another tonal alternative to the Clean and Crunch channels. Use the
rear panel Sensitivity (85), Treble (84), Mid (83) and Bass (82) knobs as well as the
Contourbutton (81)toshapeits signal.
that because this circuit takes a direct path from input to the effect loop,
you cannot use the amp's preamp control features to shape its signal. The list of
disabled features includes (22), (21), the (45)
and (42). Power amp functions such as , ,
(20), (43) and (44) remain enabled and have
thesame effectonthe astheywouldonanyotherpreampchannel.
Clean channel Gain control. This knob determines the preamp's input sensitivity in
Cleanmode; useittoset thedesiredinputlevel.
The amount of distortion depends on your guitar's pickups and the Gain Boost (4)
setting.In Clean mode, single-coil pickupsmay begin saturating the preampwhen the
knob is set to about the two o'clock position; pickups with very high output levels
(humbuckersor active pickups)will evoke mildoverdrive at evenlower settings. Ifyou
wantsqueaky cleantone,simplyback offtheGainknob accordingly.
Boosts the input sensitivity of Main Channel 1, and . The red LED above
this button lights up to indicate is on. can also be switched via
MIDIprogram changecommandortheCustomZ-9Footswitch.
Tube Driver
Tube Driver
Tube Driver
Reverb Mega Depth Punch Noise Gate
Modern/Classic Master A/B Presence A/B
Depth Boost Power Lo/Hi Speaker A/B
TubeDriver
Clean Crunch
Gain Boost Gain Boost
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Please note
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7
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CAUTION:
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As its name would imply, servesprimarily to up Clean and Crunch channel
input levels, extend both channels' gain ranges. In effect, this feature gives you two
additional variations on these two channels' basic sounds. For example, you could set
theCleanchannelGain knob to the highestsettingatwhich your guitar signal remains
distortion-free, just under the preamp clipping threshold. Then when you activate
, you will overdrive the Clean preamp slightly, yielding a grittier tone wellsuitedfor rockriffs.
AnotherCleanchannel option is tousethe asavolume booster. To dothis,
activate anddial in a Clean Gainknob setting, making sure notto push the
preampintoclipping zone. Considerthisyour high-volume cleantone,say for clucking
lead lines. Switching off gives you a softer clean tone for chord work.
Switchback andforthbetweenthe twoasdesired.
Gain control for the Crunch channel. This knob determines input sensitivity in Crunch
mode;use ittodialin thedesiredamountof preampdistortion.
Extremely high gain and volume levels in Crunch mode can produce
powerfulfeedback.Avoidfeedbacksqueals; they can leadtohearinglossanddamage
speakers! At higher volumes, back off the Gain, Treble and Presence levels in order to
preventunchecked feedback!
Single-coil pickups will evoke mildly overdriven sounds at settings somewhere
between 11 and 3 o'clock. Try settings between 9 and 1 o'clock for pickups with highoutput humbuckers or active pickups. Bear in mind the Gain Boost function. You can
activateitviaan ENGL Custom Z-9Footswitchora preprogrammed MIDI presettoget
aneven bigger,beefiercrunchtone onthefly.
This is the preamp voicing section's passive low-frequency EQ for Main Channel I's
Cleanand Crunchmodes.
This is the preamp voicing section's passive midrange frequency EQ for Main
Channel I's Clean and Crunch modes.
This is the preamp voicing section's passive high-frequency EQ for Main Channel I's
Cleanmode.
This is the preamp voicing section's passive high-frequency EQ for Main Channel I's
Crunchmode.
To help you get acquainted with the amp's fundamental sounds, I recommend that
youset all tone controls toor slightly higher than thecenter or12 o'clock position. For
Gain Boost
Gain Boost
GainBoost
GainBoost
Gain Boost
5CRUNCH GAIN
6BASS
7MIDDLE
8TREBLE CLEAN
9TREBLE CRUNCH
8
higher-gain Crunch sounds, your best bet is to turn the Treble Crunch knob down to
prevent the pickups and speakers from generating feedback (a setting in the 10-to -1
o'clockrange isrecommended).
The Clean and Crunch channels are equipped with dedicated Treble knobs so you can
tweak the top end of each of the two channels separately to suit your taste and the
given sonic scenario. You will find that grittier tones generally sound better with a
touch less treble because preamp saturation makes higher frequencies figure more
prominently in the signal. Bear in mind that you also have the two Normal Bright (10)
andUltraBright(11)buttons,aswell asthetwopowerampPresenceAandPresence B
knobs, at your disposal for shaping the high frequency range. I suggest you get into
the habit of dialing in lower Treble settings. That way, you can program various MIDI
presets with higher Presence settings and activate them, as well as one or both Bright
options,remotely andhaveplentyof tonalvariationsatyourfingertips.
This feature boosts the upper end of the high frequency range in Main Channel 1,
and . Its effectiveness decreases as Gain settings increase. The red LED
above this button lights up to indicate the Normal Bright function is on. This feature
canalso beswitchedviaMIDI programchangeorCustomZ-9Footswitch.
For a crisp or glassy tone, activate the . This setting brightens the sound
of humbucking or muddy pickups. Don't let the names confuse you:
actuallyaddresses a higher frequency rangethan .Notealso that the Gain
knob influences this sound-shaping function's intensity. Furthermore, its tonal impact
varies slightly in Modern and Classic modes, particularly when you are driving the
preampinto theclippingzone.
Locatedin theClean and Crunch preamp stage of Main Channel 1,this sound-shaping
functionboosts slightly lower highfrequencies. Unlike (10),its intensity
remains the same irrespective of the Gain knob setting. The LED above the button
lightsuptoindicatethe Ultra Bright functionison.Itcanalsobeactivatedremotelyvia
MIDIprogram changeorCustomZ-9Footswitch.
Thisvoicingoptionupsthetwangfactorinherentincertaintypesofguitars,andletsyou
putasetofsoniccowhornsonthosethatlackit.Feelfreetocontrolthissound-shaping
functionremotelyviaMIDI.Butwhicheverwayyouchoosetouseit,Irecommendthat
youdon'toverstatetop-endfrequencies.Backoffthe twoTrebleknobstoavoid harsh,
cuttingorover-the-topbrightness.InClassicmode,high-frequencypeaksaredampened
anywaywhentheampstartsclipping.InModernmode,thetonecanbecomeverygritty
andraw,particularlywhenBrightfunctionsareactivated.That'snotnecessarilybad;for
some sounds, this effect can be quite compelling. I suggest you literally play it by ear
experiment freely and you are sure to discover many interesting and inspiring topdrawertones.BesuretogivetheModern/Classicsound-shapingfunctions,aswellasthe
powerampPresenceAandBknobs,agoodworkout.Isuspectyou'llbedelightedbythe
arrayoftones,particularlyasyouadddifferentguitarsandpickupstothemix.
Clean Crunch
Normal Bright
Normal Bright
UltraBright
NormalBright
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10NORMAL BRIGHT
11ULTRA BRIGHT
9
12REVERB
13CLEANVOLUME
14CLEAN
15CRUNCHVOLUME
16CRUNCH
17PRESENCE A
18PRESENCE A/B
Reverb intensity knob. Twist it to adjust the amount of reverb for Main Channel 1
. Activate (22) and twist the Reverb knob clockwise to increase
the effect's intensity. The signal remains completely dry when the knob set to the 7
o'clockpositionor (22)isdeactivated.TheredLEDabovethisbuttonlightsupto
indicate ison.Inaddition,itcanbeactivatedanddeactivatedviaMIDIprogram
changeorCustomZ-9Footswitch.
Determines the Clean channel's level. Use this knob to adjust the Clean channel's
volume and dial in the desired balance in comparison with the other channels' levels.
Becausethisknobislocated pre effects loop,italsodeterminestheeffectssendlevelin
Clean mode. The green LED to the right of the knob lights up to indicate the Clean
channelison.
Pushthis buttonto activate the preamp's Clean channel directly (in reciprocation with
, , , and ). The green LED to the right of the
Clean Volume knob (13) lights up to indicate the Clean channel is active. The Clean
channel may also be activated via MIDI program change, the ENGL Custom Z-9
Footswitch,oradualfootswitch.
Determines the Crunch channel's level. Use this knob to adjust the Crunch channel's
volume and dial in the desired balance with the other channels' levels. Because this
knob is pre effects loop, it also determines the effects send level in Crunch mode. The
yellowLEDtotherightoftheknoblightsuptoindicatetheCrunchchannelison.
Press this button to activate the preamp's Crunch channel directly. (in reciprocation
with , , , and ), The yellow LED to the right of
the Crunch Volume knob (15) lights up to indicate the Crunch channel is active. The
Crunchchannelmay also be activatedviaMIDI program change,theENGL Custom Z-9
Footswitchor adualfootswitch.
Power amp Presence A knob. This knob determines the power amp's high frequency
response when is activated. The red LED next to the knob lights up to
indicate isactive.
Switches back and forth between and . The LED next to the
givenPresencecontrollightsup to indicate it ison;redsignifies ison;green
signifies ison. may also be switched via MIDIprogramchange
orCustom Z-9Footswitch.
Clean/Crunch Reverb
Reverb
Reverb
Crunch Lead I Lead II Tube Driver T. D.EQ.
Crunch Lead I Lead II Tube Driver T. D.EQ.
Presence A
PresenceA
Presence A Presence B
PresenceA
PresenceB PresenceA/B
10
19PRESENCE B
20DEPTH BOOST
21MEGA LO PUNCH
22REVERB
Power amp Presence B knob. This knob determines the power amp's high frequency
response when is activated. The green LED next to the knob lights up to
indicate isactive.
The two Presence knobs afford you a host of interesting and worthwhile options for
shaping sounds: You can dial in different settings on the Presence A and B knobs (for
example,set to 10o'clockand to3o'clock)andassignthese two
knobs to different preamp channels and sound modes ( & ) in various
MIDI presets. Note that simply switching from to while the
preamp setting remains the same yields different sonic results, not to mention all the
otheroptions.Again,Irecommendthatyouexploreandexperimentfreelytodiscover
theuntold combinationsandconfigurationsat yourfingertips.
Push the Depth Boost button to beef up the bottom end by about 6 dB. The red LED
above the button lights up to indicate the power amp Depth Boost feature is
activated. It can also be activated remotely via MIDI program change or Custom Z-9
Footswitch.
In contrast to the preamp feature (21), is wired into the
power amp circuitry (specifically in the feedback circuit). Though they both boost
bottom-end frequencies, these two functions have different effects. In combination
with the Presence A and B knobs, forms a separate power amp voicing
section that you can mix and match with different preamp channel settings and the
TubeDriver circuit, adding differenthues to your sonicpalette, and tweakingtonesto
suityour taste.
Whenactivated, this functionboosts low-end frequencies inall four preampchannels.
The red LED above the button lights up to indicate this function is on.
does not influence the Tube Driver circuit. It may also be activated remotely via MIDI
programchange orCustomZ-9Footswitch.
effects vary, particularly in Lead channel Modern and Classic
operating modes. When is on, it boosts the bottom-end much in the way of
the power amp feature , meaning that it audibly increases sound
pressure.WhenClassic mode is activated,theeffect depends on theGainknob setting
andisnotnearlyaspronounced.At very high Gain settings and depending onthetype
of pickup, the signal's low end may become rather muddy. When you configure the
amp in Classic mode and dial in a high gain level, I strongly suggest you deactivate
MegaLo Punch.
This button activates and deactivates the onboard spring reverb system. The red LED
above the button lights up to indicate is active. This button is important when
you're programming MIDI patches. Use it to assign the internal reverb signal to the
Presence B
PresenceB
PresenceA PresenceB
Modern Classic
Presence A Presence B
Mega Lo Punch Depth Boost
Depth Boost
Mega Lo Punch
Mega Lo Punch's
Modern
Depth Boost
Reverb
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11
desired MIDI preset. Adjust the wet signal for the two Main Channels using the
assigned Reverb knob (12, 35). canalso be switched via MIDI program change
orCustom Z-9Footswitch.
This button switches to and fro between and . The red LED above
the button lights up to indicate is on. You can also select loops via MIDI
programchange orCustomZ-9Footswitch.
Both effect loops can be configured in series (that is, 100% processed signal when
is set to ) or in parallel (1% to 99% mix of preamp and effect signal when
is set somewhere between and ), or be bypassed altogether (0 % wet
balance when is set to ). You can connect an effect device to each of the
effect loops and switch from one effect device to the other using the FX Loop I/II
function, or employ just one of the two effect loops (for example, FX II Loop) and use
to activate the effect. In the latter case, serves as a bypass (set
its knobto the position). You could also connecta further effect device to
the and alternate between it and the effect device connected to
(and , if it is in use), or combine the two. Note that in the signal path,
and arepost andprethe two master knobs.
Press this button to activate and deactivate the .The red LED abovethe
button lights up to indicate is activated. You can also switch the
onand offviaMIDIprogram changeorCustomZ-9Footswitch.
The isan auxiliary effects loop. As its name would indicate, itis wiredin
series with and . This setup lets you insert two effect devices in
series, that is, one after the other, between the Special Edition's preamp and power
amp.Anotherneatoptionisto put all effect loops to gooduse.Forinstance,youcould
insert three different effect devices into the amp's signal path, with one device
connected to each loop. This lets you enable the devices (two of which can then be
activatedsimultaneously) bysimplyswitchingloops.
¼"unbalanced inputjack.Plugyour guitarinhereusing ashieldedcord.
Depending on the type of cord and its shielding, you may occasionally encounter
interference from sources such as radio stations or powerful magnetic fields. When
this occurs, try connecting your guitar to the amp using different cords. What's more,
to minimize signal degradation due to high-frequency loss, use the shortest cords
feasible (as a rule, the shorter the cord, the less susceptible it is to high-frequency
attenuation).
Reverb
FX Loop I FXLoop II
FX Loop II
Balance wet
Balance dry wet
Balance dry
FX Loop I/II FX Loop I
Balance dry
Serial FX Loop FX
Loop II FX Loop I
FXLoopI FXLoopII SerialFXLoop
Serial FX Loop
Serial FX Loop Serial
FXLoop
Serial FX Loop
FX Loop I FX Loop II
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23FX LOOP I/II
24SERIAL FX LOOP
25INPUT
12
26LEAD I GAIN
27HI GAIN
28LEAD II GAIN
29BASS
This knob determines the Lead I channel's input sensitivity and preamp saturation
level.
Extremelyhighgain and volume levelsin Lead mode canproducepowerful
feedback. Avoid feedback squeals; they can lead to hearing loss and damage
speakers! At higher volumes, back off the Gain, Treble and Presence levels in order to
preventunchecked feedback!
Thetwo Lead channels'fundamental tones are not worlds apart: boastsslightly
less gain and bottom end, but its speedier response makes it a great choice for brisk
riffingand lightningleadruns.
Pressing this button ups input sensitivity, thereby increasing the amplification factor
and the amount of distortion in both Main Channel 2's Lead I and Lead II modes. The
LED above this button lights up to indicate is active. This feature can also be
switchedvia MIDIprogramchangeorCustomZ-9Footswitch.
When activated, supercharges the amplification factor, switching from
to and putting both Lead channels into high gear. This doubles the
number of basic sounds in Main Channel 2. The Soft Lead setting suffices for highoutput pickups - even for playing leads - so you can leave off if your guitar is
shred-approved. settings also work for chugging rhythm riffs or as
alternative crunch sounds, so give 'em a try. But by all means, for scorching ultra highgain lead sounds with truckloads of sustain or for power chords with a monster
bottom-end,go fortheHeavyLead variantwith activated.
This knob determines the Lead II channel's input sensitivity and preamp saturation
level.
The two Lead channels' fundamental tones are not worlds apart: boasts a bit
more gain and bottom end than ,and works very well for fat, in-your-face solos
and chunky riffs with a big bottom end with plenty of low-frequency punch. Its
response is not quite as speedy as , and the low-end can turn muddy at high
Gainsettings incombinationwithhigh-testosterone pickups.
This is the preamp voicing section's passive low-frequency EQ for Main Channel 2's
LeadI andLeadIImodes.
CAUTION:
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Atip from thedesigner:
Atip from thedesigner:
LeadI
Hi Gain
Hi Gain Soft
Lead Heavy Lead
Hi Gain
Soft Lead
HiGain
Lead II
Lead I
Lead I's
CAUTION:Extremelyhigh gain and volumelevels in Lead modecanproduce powerful
feedback. Avoid feedback squeals; they can lead to hearing loss and damage
speakers! At higher volumes, back off the Gain, Treble and Presence levels in order to
preventunchecked feedback!
13
30MIDDLE
31TREBLE LEAD I
32TREBLE LEAD II
33CONTOUR ACTIVE
34MID EDGE
This is the preamp voicing section's passive midrange EQ for Main Channel 2's Lead I
andLead IImodes.
Thisis thepreampvoicingsection's passivehigh-frequencyEQforLeadImode.
Thisis thepreampvoicingsection's passivehigh-frequencyEQforLeadIImode.
To help you get acquainted with the amp's fundamental sounds, I recommend that
you set all tone controls to about the center or 12 o'clock position. For higher-gain,
high-volumeleadsounds,yourbestbetis to turn the Treble knob downtopreventthe
pickupsandspeakersfromgeneratingfeedback(asettinginthe9-to-1o'clockrangeis
recommended).
The Lead I and Lead II channels are equipped with dedicated Treble knobs so you can
tweakthetop end of eachofthese two channels separatelytosuit your taste. Though
this passive voicing section's controls range is narrower than that of a comparable
active system, its EQ curve is tweaked specifically for its designated purpose, and will
give you satisfying results. What's more, in combination with the two sound-shaping
buttons and , you have heaps of voicing options for tailoring basic
soundsto taste.
shapes midrange frequencies for Main Channel 2's Lead I and Lead II modes.
When activated, Contour boosts low mids from 300 to 600 hertz as well as the
frequency at 1500 hertz. Note that the Contour setting influences the functionality
and range of the Mid knob (30). The LED above the button lights up to indicate
is activated. This feature may also be switched via MIDI program change or
theENGL CustomZ-9Footswitch.
Though this voicing section is passive and its control range is therefore somewhat
narrower, with and you have two additional tools available for
shaping the midrange. And for good reason music is made in the mids, and these
frequenciesare critical to dialingin happening leadtones. You canemploy to
scoop mids radically and conjure rabid heavy metal tones or boost them to elicit
assertivelead sounds.
This sound-shaping tool addresses midrange frequencies by slightly lowering the Mid
knob'sfrequencyspectrum.The LED above thebuttonlightsuptoindicate is
activated. This feature can also be switched via MIDI program change or the ENGL
CustomZ-9 Footswitch.
Like , is a passive voicing feature. Consequently, its effect on the
soundscape is rather subtle. Technically speaking, it actually re-voices the Mid knob.
Activating smoothes out lead tones' rough edges. Deactivating
Atip from thedesigner:
Atip from thedesigner:
Atip from thedesigner:
Contour Mid Edge
Contour
Contour
Contour Mid Edge
Contour
MidEdge
Contour Mid Edge
Mid Edge Mid Edge
14
and thins out the lead tones' midrange, creating a more brittle tone. This
brandof toneis better suited for rhythm work becauseit isnot as aggressive or overly
assertive.Different combinationsof and yieldfour additionaltonal
variants in Main Channel 2, and these variations can be programmed, stored and
accessedvia MIDI.
Reverb intensity knob. Twist it to adjust the amount of reverb for Main Channel 2's
LeadIand Lead II modes.Activate (22) and twist theReverbknob clockwise to
increasethe effect's intensity. The signalremains completely dry when theknob set to
the 7 o'clock position or (22) is deactivated. The red LED above this button
lights up to indicate is on. In addition, it can be activated and deactivated via
MIDIprogram changeorCustomZ-9Footswitch.
Determines the Lead I channel's level. Use this knob to adjust the Lead I channel's
volume and dial in the desired balance in comparison with the other channels' levels.
Becausethisknobislocated pre effects loop,italsodeterminestheeffectssendlevelin
Lead I mode. The red LED to the right of the knob lights up to indicate the Lead I
channelis on.
Pushthisbutton to activatethepreamp's Lead Ichanneldirectly (in reciprocation with
, , , and ).TheredLEDto the right of theLeadI
Volumeknob(36)lightsupto indicate Lead I channel is active.Itmayalsobeactivated
viaMIDI programchange,theENGL CustomZ-9Footswitch,oradualfootswitch.
Determines the Lead II channel's level. Use this knob to adjust the Lead II channel's
volume and dial in the desired balance in comparison with the other channels' levels.
Becausethisknobislocated pre effects loop,italsodeterminestheeffectssendlevelin
Lead II mode. The red LED to the right of the knob lights up to indicate the Lead II
channelis on.
Pushthisbutton to activatethepreamp'sLeadIIchanneldirectly(in reciprocationwith
, , , and ).The red LED to theright of theLead I
Volume knob (38) lights up to indicate the Lead II channel is active. It may also be
activated via MIDI program change, the ENGL Custom Z-9 Footswitch, or a dual
footswitch.
Master A volume knob. Located post effect loops, it controls power amp output. The
red LED to the right of the knob lights up to indicate is enabled and
determiningthe master level. Youcan also setthe master level to0 via MIDIcontroller
7.To learnhowtodo this,seesection55 inthe chapter.
Contour
MidEdge Contour
Reverb
Reverb
Reverb
Clean Crunch Lead II Tube Driver T.D.EQ.
Clean Crunch LeadI Tube Driver T.D.EQ.
Master A
RearPanel Features
35REVERB
36LEAD I VOLUME
37LEAD I
38LEAD II VOLUME
39LEAD II
40MASTER A
15
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