TUBE PREAMP 570 Full Tube Guitar Preamp with MIDI-Control Operator´s Manual Please, first read this manual carefully!
Tube Amp Technology 2
Table of Contents Introduction Features and Functionality at a Glance Contents Front Panel Features: Preamp Defeat; Clean and Crunch Channel Control Features Modern/Classic, Mega Lo Punch,Stereo FX Loop Input; Lead I and Lead II Channel Control Features Noise Gate Write/Copy Power Rear Panel Features: Mains, Mains Fuse, Ground Lift Switch Noise Gate: Mute Depth, Threshold Level Balanced Line Out: Level, Overload LED, Line Out Status, XLR Ground, Line Output Frequency Compensated Stereo Output: Right & Left,
Congratulations! With the Preamp E570, you now own one of the most advanced and versatile Guitar preamps available today! This sophisticated guitar preamp marries the unrivalled tone of all-tube technology to the awesome sound-shaping might of control features powered by state-of-the-art microchip circuitry. This elegant combination puts at your fingertips a vast range of great fundamental tones and an all but inexhaustible reservoir of compelling variations all of which may be controlled remotely via MIDI.
-> Programmable stereo effect loop: Use this circuit to insert stereo effect devices into the signal chain. -> Master knob: Overall output level control. The preamp can also be muted via MIDI controller 7. -> Stereo Effects Loop: Use this circuit to insert stereo effect devices into the signal chain. -> A stereo jack offers an unbalanced, frequency-compensated line out signal for recording to tape deck or PC.
Front Panel Features 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 preamp's features, you'll gain a better understanding of the topic of discussion if you unfold and refer to them as we go! 1 PREAMP DEFEAT This is a bypass that cuts the preamp out of the signal chain when you press the button. In this case, the input signal is routed directly to the Send jack.
4 CRUNCH GAIN Gain control for the Crunch channel. This knob determines input sensitivity in Crunch mode; use it to dial in the desired amount of preamp distortion. CAUTION: Extremely high gain and volume levels in Crunch mode can produce powerful feedback.
9 NORMAL BRIGHT This feature boosts the upper end of the high frequency range in Main Channel 1, Clean and Crunch. 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 can also be switched via MIDI program change or Custom Z-9 Footswitch. A tip from the designer: For a crisp or glassy tone, activate the Normal Bright. This setting brightens the sound of humbucking or muddy pickups.
13 CRUNCH VOLUME 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 effect loop, it also determines the effect send level in Crunch mode. The yellow LED to the right of the knob lights up to indicate the Crunch channel is on. 14 CRUNCH Press this button to activate the preamp's Crunch channel directly.
on the Gain knob setting and is not nearly as pronounced. At very high Gain settings and depending on the type 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 Mega Lo Punch. 17 FX LOOP ACTIVE Press this button to activate and deactivate the FX Loop. The red LED above the button lights up to indicate FX Loop is activated.
Lead to Heavy Lead 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 Hi Gain off if your guitar is shred-approved. Soft Lead settings also work for chugging rhythm riffs or as alternative crunch sounds, so give 'em a try.
The Lead I and Lead II channels are equipped with dedicated Treble knobs so you can tweak the top end of each of these two channels separately to suit 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.
29 LEAD I Push this button to activate the preamp's Lead I channel directly (in reciprocation with Clean, Crunch, Lead II, Preamp Defeat). The red LED to the right of the Lead I Volume knob (28) lights up to indicate Lead I channel is active. It may also be activated via MIDI program change, the ENGL Custom Z-9 Footswitch, or a dual footswitch. 30 LEAD II VOLUME Determines the Lead II channel's level.
telltale signs that feedback is swelling and consequently can't take measures to suppress it. For this reason, make an extra effort to be careful when the Noise Gate is activated: Before you approach the preamp or 19" racksystem and speaker cabinet with your guitar in hand, turn the guitar's volume knob to the far left position (to 0 so that no signal is audible) to prevent the pickups and speakers from interacting! A tip from the designer: Noise is a definite no-no in many situations.
IMPORTANT note; please read and heed: MIDI preset 1 activates when the preamp is powered up. If you want to edit and/or store other MIDI presets, you must connect a MIDI foot board or another MIDI send device to the MIDI In port (55) and use this outboard device to select the desired MIDI preset on the preamp. More good-to-know info: Note that the Status LED also indicates the status of components unrelated to Write and Copy. The microcontroller runs a short system check after you switch the preamp on.
39 MUTE DEPTH This knob setting determines to which extent the level drops when the active Noise Gate mutes the signal; in other words, it sets the residual volume level. The further you twist the knob clockwise, the greater the drop in (noise) level when the Noise Gate mutes the signal. 40 THRESHOLD LEVEL Use this knob to set a threshold value (that is, the noise level) at which the Noise Gate activates to suppress the signal.
44 & 45 FREQUENCY COMPENSATED LINE OUT BALANCED These are the frequency-corrected (compensated) and balanced right and left channel line outputs. Pin 2 and 3 of the XLR jack carry the signal, pin 1 = N.C. or ground depending on the position of the Ground switch (46). The signal routed to this output limits the response of a guitar cabinet. You can insert the signals routed through these outputs directly into a mixing console or recording gear equipped with balanced inputs.
51 FX LOOP RETURN LEFT Connect the left FX Loop input to a signal processor's left channel output/send jack using the shortest possible shielded cord equipped with 1/4" plugs. Activate and deactivate it via the Stereo FX Loop (17) button. In the signal path, the Stereo FX Loop is located post channel Volume controls and and pre the Master control and the output driver stage.
57 MIDI CHANNEL & VOL.0 Use this set of encoding buttons (1, 2, 3, 4 and 5) to assign the MIDI channel. This tells the preamp's MIDI system over which channel it will receive MIDI program change commands. Your choices are the standard 16 MIDI channels (numbered from 00 to 15), as well as OMNI mode (whereby all MIDI data is received regardless of the MIDI send channel). The encoding button settings for a specific channel and OMNI mode are listed in the following table.
enabled foot board is a custom design that switches every preamp feature designated as footswitchable in this manual. To learn if a given feature may be controlled remotely, refer to its description herein. The MIDI In port is disabled when the Z-9 Footswitch is connected. CAUTION: Connect only the ENGL Z-9 Footswitch to this 6.
A few words from the designer on your ENGL 570 Preamp's sounds and settings as well as some practical tips: On the Subject of Sounds and Settings A great deal of effort went into tuning this tremendously versatile tube preamp; I devoted particularly painstaking attention to the details: The Clean and Crunch channels are matched so that their Gain ranges overlap somewhat; the same goes for Lead I and Lead II. This is intentional, and serves very sensible sound-sculpting purposes.
Mega Lo Punch sound-shaping button is programmable, providing instant MIDI access to a host of sonic configurations. In addition, I made a point of tuning the two Lead channels to respond slightly differently: Lead I's response is a bit more aggressive, faster and more precise it all but lunges when you attack strings. Lead II, on the other hand, is not quite as testy. Its response is not as rabid, and with an extra sprinkling of low end added to the sonic recipe, it also delivers warmer tone.
gain thing in Crunch or Soft Lead modes, dial in a lower Threshold knob setting (below 12 o'clock) to prevent the gate from throttling notes (that is, the musically useful sounds) as they decay particularly if you like to work the guitar's volume knob. Programming sounds (settings, actually) to MIDI presets: For reasons of convenience and handling ease, we made programming sounds to MIDI presets a piece of cake.
Handling and Care: Keep the preamp safe from hard knocks and shocks. Tubes are fragile and tend to suffer when exposed to mechanical stress! Let the preamp cool down before you transport it. Ten 10 minutes or so will do to spare the tubes. Tubes take some 20 seconds to warm up after you switch the power on. Make a habit of giving your preamp plenty of time to get toasty before you start playing. Avoid storing the preamp in damp or dusty rooms to spare jacks, switches and potentiometers.
Glossary MIDI-Preset: In this manual, MIDI programs are called presets and patches. Though the MIDI standard defines program numbers 000 to 127, almost all MIDI devices and foot boards indicate and control these programs using a 1-to-128 numbering scheme. MIDI Channel: MIDI specifications define 16 channels for sending and receiving MIDI data. The encoding buttons on the back of the preamp determine the MIDI data receiver channel.
Troubleshooting Programmable features fail to respond when you change settings: -> Powerful static charges, strong radio signals or mains voltage spikes can affect microcontroller-driven systems, setting them to an undefined status (commonly called a hung chip). In this event, your only choice is to reset the system. Simply switch the preamp off and on again.
silence, hello humming! In this case, the preamp will hum even without a guitar connected. -> Cords connected to the input, effect loops or to the power amp may not be shielded properly. Replace them to check if this is indeed the case. -> The preamp or speaker cords may be picking up interference from powerful magnetic fields (for example, of nearby power transformers or electrical motors). Reposition the preamp and connector cables.
Technical Data Input sensitivity Input: Effect Return: Output level SEND, level range: Level Lo: Level Hi: Frequ. Comp. Line Out: from -20 dB to approx. 0 dB max.; ca. -5 dB max.; ca. +15 dB max.; ca. 0 dB max., (depends on frequency); Power consumption: approx. 35 watts (VA) max.
Tube Map: V1 V2 V3 V4 Power Transformer internal Mains Fuses Tube replacement report: 1. Replaced on: _ _ _ _ _ _ _ 20 _ _ _ Replaced by: _ _ _ _ _ _ _ _ _ _ _ _ _ _ Replaced tube(s): _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Reason: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 2.
Wiring of Principal Connectors LINE OUT BALANCED (44 & 45), XLR male connector Pin 1 - or ground, depending on the position of the switch XLR GROUND (46) Pin 2: signal + Pin 3: signal - page: 17 MIDI IN (55), DIN connector Pin 3 - N.C. Pin 1 - power supply approx.11 volts AC * Pin 5 - MIDI-data wire Pin 4 - MIDI-data wire Pin 2 power supply page: 18 approx.11 volts AC * *: AC voltage is routed to pin 1 and 2 only when button 56 is set to ENGL MIDI Footcontroller.
Options for controlling the ENGL 570 Preamp remotely: 1./2. 2. 3. CAUTION: CONNECT ENGL CUSTOM FOOTSWITCH Z-9 ONLY TO THE S.A.C. PORT! REPLACE FUSE ONLY WITH SAME TYPE AND RATING ! FOOTSWITCH R CAUTION ! 1 2 3 4 5 6 MIDI THRU GROUND FLOATED MIDI IN MIDI CHANNEL & VOL.
Noting Settings: TUBE PREAMP 570 PREAMP DEFEAT R CLEAN GAIN GAIN BOOST CRUNCH GAIN BASS MIDDLE TREBLE CLEAN TREBLE NORMAL ULTRA CRUNCH BRIGHT BRIGHT CLEAN VOLUME CLEAN CRUNCH CRUNCH VOLUME LEAD I GAIN HI GAIN LEAD II GAIN BASS MIDDLE TREBLE LEAD I TREBLE CONTOUR MID LEAD II ACTIVE EDGE LEAD I VOLUME LEAD I LEAD II LEAD II MASTER VOLUME VOLUME MODERN FX LOOP CLASSIC M.L.P.
page: <------ 6 ------> 1 2 <------------------------------ 7 -----------------------------> 3 4 5 6 7 8 <--------------- 8 ---------------> 9 10 11 <----------- 9 -----------> > 10 < 12 13 14 15 16 17 TUBE PREAMP 570 PREAMP DEFEAT CLEAN GAIN CRUNCH GAIN GAIN BOOST R BASS TREBLE CLEAN MIDDLE TREBLE NORMAL ULTRA CRUNCH BRIGHT BRIGHT CLEAN VOLUME CLEAN CRUNCH CRUNCH VOLUME MODERN FX LOOP CLASSIC M.L.P.
R Tube Amp Technology Gerätebau GmbH Germany Internet: http://www.engl-amps.
