BMT Tube Wizard IV User manual
TUBE
WIZARD
IV
Guitar
Preamp
OWNER’S
MANUAL
bmtamps.com.ua 2
CONTENTS
1. Introduction……………………………………3
2. Safety precautions and warnings.…………4
3. Complete set…………………………………..5
4. General information………………………….5
5. Controls…………………………………………6
6. Specifications………………………………….9
bmtamps.com.ua 3
1. INTRODUCTION
Dearuser!
WearepleasedtointroduceyoutheguitartubepreampTubeWizardIV.Designedfor
modernguitarists,TubeWizardIVisALLTUBEandhasthreeseparatechannelsofaudio
processing:
CLEAN‐cleanandslightlyoverdrivensound
CRUNCH‐averagelevelofoverdrive
LEAD‐highlevelofoverdrive
AllchannelshaveseparateEQs,whichgivesyouapossibilitytocreategreatdiversityof
soundcharacters.
SOLOswitchletsyouadjustthevolumewhenyouplay.Thisisakeyfunctionduringlive
performances.
PreampisequippedwithFXLOOP(paralleltoserialadjustable),whichiscrucialwhenyou
arelookingforbalanceinpreamp/effectsound.
Preamphasaprogressivecabinetemulationsystem,sothatyougetanexcellentguitarsound
notonlywhenconnectedtoaguitaramporpoweramp,butwhenyouplay"in‐line"andin
headphones.
TubeWizardIVwillsurpriseyouwithavarietyofoptionsandshadesofsound–youcanget
everythingstartingfromcrystalcleansoundtoamassivelyoverloadedroar!
YouarewelcometogetacquaintedwithallthepossibilitiesofTubeWizardIV,andafterthat
–justexperiment!Taketimetofamiliarizeyourselfwiththewiderangeofsoundsthepreamp
offers.
TubeWizardIVwillrespondtoeverynuanceofyourperformance!
Bestwishes,
BMTTeam
bmtamps.com.ua 4
2. SAFETY PRECAUTIONS & WARNINGS
PLEASE, ALWAYS OBSERVE THESE PRECAUTIONS:
CAUTION!DANGER!Highvoltage!Riskofelectricshock!Thedeviceisunderhigh
voltage,life‐threatening.Toavoidelectricshock,donotremovetheinstrumentcover
anddonottrytomakerepairs.Therearenouserserviceablepartsinside.
Keepthedeviceawayfromchildren.
Beforeusing,makesurethedeviceisproperlygrounded.
Inordertoavoidfireorelectricshockthedevicemustnotbeexposedtorainor
moisture.Donotplaceobjectsfilledwithliquidontopofthedevice.
TubeWizardIVisequippedwithagroundedpowercordtopreventpossibleelectric
shock.ThepowercordmustbeconnectedtothegroundedACsockets.Donot
disassembletheACpowerreceptacle.
Whenreplacingthefuse,disconnectthepreampfrommainsandusefusesofthe
correcttypeandrating.
Laythemainscablesothatitisnotsteppedonandavoiditscontactwithsharp
subjects.
WARNING!Allserviceinstructionsareintendedonlyforqualifiedpersonnelinorderto
avoidelectricshock;donotcarryoutanyrepairworkswhicharenotdescribedinthe
instructionmanual.Repairworksmustbecarriedoutonlybyqualifiedexperts.
To avoid possible damage of the preamp:
Donotblockorcoverventslots.
Incaseofthunderstormorfiredisconnectthedevicefromthemains.
Ifthedeviceisnotusedforonehourormore,disconnectitfromthemains.
Donotstoreoroperatethedeviceinhighhumidityconditions.
Donotplacethedeviceindirectsunlightornearaheater.
Donotdroporthrowthedevice.
Whenconnectingtoamainssupply,makesurethatthepowersupplycomplieswith
thedevice(correctvoltageforyourregion)
Changeaudioconnectionsonlywhenthedeviceisturnedoff.
Donotapplyexcessiveforcetotheswitchesandcontrols.
Tocleanthepreampdonotusesolvents,usecleananddrycloth.
bmtamps.com.ua 5
3. COMPLETE SET
Thecompletesetincludes:
TheguitarpreampTubeWizardIV
Thepowercord
User’smanual(printedorpdfversion)
4. GENERAL INFORMATION
ThepreampTubeWizardIVhasthreeseparatechannelsCLEAN,CRUNCHandLEADand
traditionalpassiveEQswithadjustableBASS,MIDDLEandTREBLE,regulatorsGAIN,VOLUME
andSWEEP(regulatorofthefrequencylevel).DRIVEMODEswitchgivesyou+9optionsof
overloadcharacteronLEADchannel.Thisallowstocreateasoundwhichisclosetothesound
ofpreampsofmanyfamousamplifiers.SOLOswitchletsyouadjustthevolumewhileplaying.
Thisisakeyfunctionduringliveperformances.
Controlsinchannellines(GAIN,SWEEP,BASS,MIDDLE,TREBLE,VOLUME)performsimilar
functionsintherespectivechannels.FXMIXcontrolregulatestheratioofsignalpreamp/
effect.
TheVOLUMEcontrolinMASTER‐sectionchangestheoverallvolumeofthepreamp.The
preampisequippedwithBUILT‐IN2WPOWERAMPwhichallowsyoutoconnectthepreamp
directlytotheguitarcabinet,HiFispeakersystemorheadphones,whichisreallyconvenientif
youdonothaveanexternalpoweramplifier.
bmtamps.com.ua
6
5. CONTROLS
For convenience, we will explain the controls, using the analogy with the position of the clock (for example:
GAIN control in position 11:00).
FRONT PANEL:
1. GAIN (sensitivity) controls not only regulate the total gain and sensitivity of the corresponding
channel, but also significantly change the character of the sound. Low settings (7: 00-11: 00) create the
most clean and clear timbre with high dynamic range (especially at high frequencies). If the level of
control is raised the sound becomes more dense and congested, especially on drive channels.
2. SWEEP (shift) control determines the overall sound spectrum of the channel. At low levels (7:00-
11:00) low frequencies are emphasized, at medium (11:00-2:00) the entire frequency range increases
evenly, and at high levels (2:00-5:00) high frequencies are highlighted.
3. BASS (low) control determines the amount of low frequencies in the output signal of the preamp.
Excess of low frequency makes the sound of the instrument illegible and boomy. For clean rhythm
tones it is recommended to set the BASS at the middle level (12: 00-2: 00), and for overdrive rhythm
tones with high gain at the level 11:30 or less.
4. MIDDLE control affects the mid-frequency range of the signal. Strengthening of the midrange allows
to create a more "cut-through" and vivid sound. In some cases, it can be used to brighten the guitar
sound from the overall sound of the band. Low levels of the control cut midrange frequencies, giving a
characteristic sound, often used in heavy music.
5. TREBLE (high) control determines the level of treble in the signal and is the most effective of all the
timbre regulators. You need to know that TREBLE levels, that are too high or too low, can lead to an
unbalanced sound. At high levels of the control (3: 00-5: 00) the sound is bright and "glassy". At low
bmtamps.com.ua
7
levels (7: 00-10: 00) the impact of this regulator decreases and the sound becomes “warmer”. It is
recommended to use this control with great care, it will give the best results.
6. VOLUME control sets volume of the corresponding channel.
7. DRIVE MODE switches change the sound on LEAD channel. A / B / C switch changes the timbre of
the sound on LEAD channel. 1/2/3 switch changes the character of the overdrive on LEAD channel.
Thanks to these switches you can get the sound character which is close to preamps of many famous
sound amplifiers. If you want to get a “clean” sound on CRUNCH channel when volume of guitar is
decreased, then 1/2/3 switch should be installed in position 1.
8. CLEAN / DRIVE and CRUNCH / LEAD footswitches allow to switch between the channels. When
CLEAN channel is on, the green LED near the switch CLEAN / DRIVE glows. When CRUNCH
channel is on, green LED near the switch CRUNCH / LEAD glows. When LEAD channel is on, the
LED turns red.
9. SOLO footswitch is used to activate the SOLO mode (change in volume). When you activate SOLO
mode, yellow LED near the corresponding switch glows.
10. FX LOOP footswitch is used to connect the pedal effects or processors plugged in the loop ( send and
return ) of the preamp. When you activate FX LOOP red LED near the switch FX LOOP glows.
11. MASTER-section controls: VOLUME sets the level of total volume of the preamp; SOLO changes the
level of volume on the corresponding mode when SOLO mode is on; FX MIX sets the ratio of signal of
the preamp and effects/processors pluggged in the loop of the preamp. When FX LOOP is on, turning
the control clockwise increases the signal level from effect/processor, when installing FX MIX control
to the rightmost position the entire signal passes through effect/processor, so loop turns into a serial. If
the effects are not used in the loop and the signal is taken from the OUTPUT 2, it is recommended to
set the FX MIX control to the leftmost position.
bmtamps.com.ua 8
REAR PANEL:
12. The power cord is connected to the power receptacle. For safety reasons, the power cord should be
connected only to grounded AC sockets with the voltage level used in your country ( Europe – about
220-230V, USA – 120V ). The main fuse compartment is at the top of the power receptacle. Use the
0.3A fuse for Europe, and 0.5A fuse for USA. To replace the fuse, disconnect the device from the
mains, push the fuse compartment, replace the fuse and install the cover back into its place.
13. TO PHONES OR HiFi CAB output is created to connect headphones or HiFi speaker system, and also
the mixing console or to the digital audio interface. The main feature of this output is that it emulates
the sound of a full PA system.
In this output connections are made only with stereo jacks to avoid damaging the preamp.
14. TO GUITAR CAB output is for connection of the preamp to the guitar cabinet.
15. OUTPUT 2 connects the preamp to the input of the power amplifier or to the RETURN of guitar amp
(depending on the type of amplifier). Use only OUTPUT 2 for connection with the external power amp
, when the effects are plugged in in the loop, for connection to the mixer / digital audio interface - only
TO PHONES OR HiFi CAB output.
16. The OUTPUT 1 OR SEND serves to connect the preamp to the input of an external power amplifier, to
the RETURN of guitar amp or to the input of the external effect / processor. The level of signal to the
external effects adjusts with the VOLUME MASTER-section control. The level of signal from
OUTPUT 1 is about 3 times less than from the OUTPUT 2.
17. RETURN input (return of an effect) is used to connect the external effect / processor.
18. INPUT is meant for guitar connection.
19. POWER switch is designed to connect the preamp to the mains. Power is on, when the switch is set to
ON position.
20. PHONES OR HiFi CAB / GUITAR CAB switch is used to select the type of load. When the switch is
in the PHONES OR HiFi CAB position, connect the phones or HiFi speaker system to the TO
PHONES OR HiFi CAB output. When the switch is in GUITAR CAB position, connect the guitar cab
to the TO GUITAR CAB output. If the guitar cabinet is not used, it is recommended to set the switch to
PHONES OR HiFi CAB.
bmtamps.com.ua 9
6. SPECIFICATIONS
Tubes: 2 x 12AX7
Input impedance: 1MOhm
Output 1 and Output 2 impedance: 2 kOhm
Poweramp output impedance: minimum 8 Ohm
Power output: 2W
Power supply: Standard 220 V 50/60 Hz / or
Custom made varies from country or region
Power consumption: not more than 18W.
Dimensions: L x W x H about 260 x 210 x 85 mm
( 10.3 x 8.3 x 3.4 inches )
Weight: about 2.1 kg ( 4 lb 10 oz )
Dear user! Thank you for choosing our preamp.
Tube Wizard IV will be reliable and creative assistant during your journeys in the world of music.
If you have any questions, please get in touch with us on
We wish you lots of inspiration!
Play and enjoy!
Table of contents
Popular Amplifier manuals by other brands
Digital audio
Digital audio ACHAPELL AUDIO 992EG user guide
Hall Research Technologies
Hall Research Technologies AMP-7040 user manual
e-audio
e-audio B425BA manual
JBL
JBL Grand Touring Series GTO1004 Specifications
Pioneer
Pioneer SA-560 operating instructions
Creative
Creative Sound Blaster E3 SB1610 user guide
