Trafomatic Audio Premise User manual

Premise
Stereo Integrated Tube Amplier
User’s Manual
www.trafomaticaudio.com rev. 1
Trafomatic Audio

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Table of Contents
Section Page No.
Safety Precautions 3, 4
Getting Started
 AboutYourAmplier 5
 ConstructionandTesting 5
 Packaging/Unpacking 5,6
 Accessories 6
 PreparationforUse 6
 OperatingProcedures 6
Controls and Their Functions 7
Vacuum Tube Layout: 8
Tube Replacement 8, 9
Servicing 9
Technical Specications 9
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Stereo Integrated Tube Amplier
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SAFETY
1) Read the User’s Manual and refer to it
frequently during use of this product
All the safety and operating instructions should be
read before the product is operated.
2) Retain the User’s Manual
The safety and operating instructions should be re-
tained for future reference.
3) Follow Instructions
All operating and instructions for use should be close-
ly followed.
4) Power Sources
This product should be operated using only the type
of power source indicated on the marking label. If you
are not sure of the type of power supply in your home,
consult your product dealer or local power company.
5) Grounding
This product is equipped with a three prong IEC con-
nector. Always use power cord with adequate wire
cross section and an electrical outlet that is grounded.
If you do not know whether the outlet is grounded,
consult your electrician or local power company.
6) Power Cord Protection
Power supply cords should be routed so that they are
not likely to be walked on or pinched. Pay particular
attention to cords at plugs, convenience receptacles
and where they exit from the product. Always use
power cords with adequate current ratings and safety
certications(UL,CE,TÜV,CSA,etc.)
7) Fuses
Forcontinuedprotectionagainstrehazard,replace
fuses with the same type and rating of the fuses
specied.Whenchangingfuses,completelyunplug
the AC cord from the wall outlet.
8) Tubes
During operation the tubes get very hot. Do not
touch the tubes since this may result in a severe
burn. Allow at least 10 minutes after removing pow-
er for tubes to cool down before touching them.
9) Turn-off when not using
Turn off the unit as soon as you stop actively using
it. Unplug the power supply from the wall during a
lightning storm or when the product is to be left unat-
tended and unused for longer periods of time.
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CAUTION!
TOREDUCETHERISKOFELECTRICSHOCK,DONOTREMOVE
SCREWS.NOUSERSERVICEABLEPARTSINSIDE.REFERSERVICING
TOQUALIFIEDSERVICEPERSONNEL.
SAFETY PRECAUTIONS
IMPORTANT SAFEGUARDS
PLEASE READ CAREFULLY ALL THE FOLLOWING
IMPORTANT SAFEGUARDS THAT ARE APPLICABLE TO
YOUR EQUIPMENT
Stereo Integrated Tube Amplier

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ENVIRONMENT
1) Water and Moisture
Do not use this product near water - i.e. near a bath-
tub, ash bowl, kitchen sink or laundry tub; in a wet
basement; or near a swimming pool or the like. Damp
basements should be avoided.
2) Heat
The product should be situated away from heat sourc-
es such as radiators, heat registers, stoves or other
appliances that produce heat. Also avoid putting the
unit in the direct rays of the sun.
3) For indoor use only.
PLACEMENT
1) Accessibility
Itisnormalforavacuumtubepowerampliertorun
warm if used for prolonged periods. Tubes are very
hot when operating and should not be touched for at
least ten minutes after the unit is turned off to pre-
vent burns.Always place your amplier away from
children and pets to prevent burns.
2) Ventilation
This product should not be placed in a built-in installa-
tion or rack unless proper ventilation is provided or
the manufacturer’s instructions have been followed.
Neverplaceanythingontopyouramplierthatcould
obstructtheairowandcausetheelectrontubesto
overheatanddamagetheamplier.Donotplaceyour
amplierinaclosedbookcase;overheatingcouldoc-
cur.Ensurethatthereisatleast8”(200mm)ofopen
spaceabovetheamplier.
3) Surface
Placetheunitonaatlevelsurface.Careshouldbe
taken to prevent objects from falling and liquids from
spilling into the unit. Do not subject the unit to exces-
sive smoke, dust, vibration or shock.
MAINTENANCE
1) Cleaning
Unplug this product from the wall outlet before clean-
ing. Do not use liquid cleaners or aerosol cleaners.
Use a dry cloth for cleaning. Do not use any type of
abrasive pad, scouring powder or solvent such as al-
coholorbenzene.
2) Tube replacement
Electron tubes have their life in the 2000-3000 hrs
range.Westronglyrecommendreplacingtheoutput
tubesat 20-30months interval(depending onyour
listeninghabits)andsignaltubesateveryotherpow-
er tube replacement (after 24-36 months). This will
ensurethattheamplieralwaysperformsatitsbest
and tube failure will not overstress other parts.
3) Biasing the amplier
ThePremiseamplierusestubesinself-biasingcon-
gurationanddoesnotrequireanyadjustments.The
only requirement is to ensure that matched tubes are
usedinbothchannels.Matchedtubesareavailable
from multiple vendors as well as directly from Trafo-
matic Audio.
SERVICE
1) Replacement Parts
Whenreplacement partsarerequired, besurethat
the service technician uses replacement parts speci-
edbythemanufacturerorpartswiththesamechar-
acteristics as the original part.  Unauthorized sub-
stitutions may result in re, electric shock or other
hazards.
2) Tube Replacement
Should it become necessary to replace your tubes,
remove the AC power plug from the wall and allow
thirty minutes for the high voltage capacitors to dis-
charge. Follow instructions outlined in this manual.
3) Modications
Modications to the amplier are strongly discour-
aged. The unit was designed by experienced engi-
neers and tested for safe and reliable operation. Any
modicationmayposeasafetyproblemandresultin
reduced lifetime of the product. Any removal of the
cover will void warranty.
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Stereo Integrated Tube Amplier

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Your Premise Integrated amplierwasdesignedto
provideasignicantvaluebasedonahighperform-
ance to price ratio that will exceed the sonic quality of
goodsolidstateamplierswithitsmusicalaccuracy.
The Premise Integrated amplier uses four
EL84/6BQ5 output tubes per channel, driven from
antwoECC81.ThePremiseIntegratedamplieris
designed to work in a Push-Pull class A Triode/Ultra-
linerar mode. Parts are carefully chosen for the op-
timum sound quality and the overall circuit layout is
maximizedforsonicpurity.
Handling Vacuum Tubes
Many people have never had experience handling
vacuum tubes. Process is very similar to handling
incandescent light bulbs. As with light bulbs, you
should not touch a vacuum tube when it is operat-
ing since you can burn yourself. Similarly, if a tube is
droppedonahardsurfaceitwillbreak.Whenreplac-
ingthetubesallowsufcienttime,minimum30min-
utes, for tubes to cool down and internal capacitors to
discharge.Beforeyouinsertatubeyoushouldmake
certain the unit is disconnected from the AC outlet
and that the tube has cooled down. Inspect the tube
forcracksandphysicaldamage.Makesurethatthe
pins are straight. If you need to straighten the pins,
be very careful as it may cause the glass envelope
to break, causing the tube to lose the vacuum and
failassoonastheamplierispoweredon.Carefully
align the pins with the socket and gently insert the
tube. Never force a tube into a socket. Should
you decide to buy replacement tubes from Trafomatic
Audio, rest assured that they were fully tested before
the shipment.
Packaging
Saveallthepackaginginadryplace.Youramplieris
a precision electronic instrument and should be prop-
erlypackagedanytimeshipmentismade.Because
of its weight it is highly probable that the unit will be
damaged during shipment if repackaged in a box and
packing other than that designed for the unit.
Preparation for Use
Placeyouramplieronaatsurface.
Before inserting the tubes, inspect them for cracks
and physical damage. Make sure that the pins are
straight. If you need to straighten the pins, be very
careful as that may cause the glass envelope to break,
causing the tube to lose the vacuum and fail as soon
astheamplierispoweredon.Refertothedrawing
below to locate correct location for each tube. Care-
fully align the pins with the socket and gently insert
thetubeaccordingtothedrawingbelow.Neverforce
a tube into a socket.
Trafomatic Audio
Trafomatic Audio
Premise
Getting Started - About Stereo Tube Amplier
Triode Triode
4xEL84 ECC81
UL UL
ECC81 4xEL84
Made by Trafomatic Ltd
Figure 1: Premise tube layout
Never use excessive force when inserting the tubes into their socket.
Stereo Integrated Tube Amplier

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Operating Procedure
1. Make sure that you read instructions before attempting to operate your unit.
NOTE: 4 ohms and 8 ohms speakers cannot be connected to the speaker terminals at the same time!
Makesureyouramplierisproperlyconnectedtoahigh-currentpowerreceptacle.
3. WARNING.Alwaystakecarevolumecontrolisintheproperposition.Theamplierwillbefullyfunctional
afteronlyacoupleofminutes.However,asitwarmsupovertherst30minutesofoperationyoumaynotice
slight improvement in the sound quality.
4.Attheendofyourlisteningsessionmakesuretoturntheamplieroff.
Leavingitondoesnothingforsoundqualityanditreduceslifeofthevacuumtubes.
Theampliershouldalwaysbeturnedonandoffviaitsownpoweron-offswitch.
The amplier should always be turned on and off via its own power on-off switch.
2.Attachtheaudiosourcesandspeakers(refertothepicturebelow).
Never run the amplier without speakers connected since that may damage the transformers.
Speaker’sminusterminalshouldbeconnectedtothespeakerterminalmarkedaszero(0)andpositivetermi-
nalshouldbeconnectedtotheterminalthatcorrespondstothespeaker’snominalimpedance(4or8ohms).
Theamplierisoptimizedfortheseimpedances.Higherorlowerimpedancewillresultinhigherdistortionor
lossofpower.Donotuseaspeakerwithimpedancelowerthan2ohmsoneitheroftheoutputs.
Makesuretopreventshortcircuitattheamplier’sspeakerterminalsasthatwilldamagetheamplier.
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Premise
Figure 2:PremiseamplierFrontpanel
Figure 3: Premiseamplierspeakersconnection
Stereo Integrated Tube Amplier

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Back Panel
Power Switch: Press the power switch to (I)
turnthepoweron.Within10-20seconds,asthe
heaters reach operating temperature the tubes
will begin to glow a soft orange light. Press the
power switch to (0) to turn the unit off.As the
heaters cool off, the orange glow will slowly dis-
appear.
It is normal for a vacuum tube equipment
to run warm if used for prolonged periods.
Tubes are operating at much higher tempera-
ture and should not be touched for at least
ten minutes after the unit is turned off to pre-
vent burns.
Always place your amplier away from chil-
dren and pets to prevent burns.
Audio signal connection jacks - Use these
jacks to connect the audio interconnects from
yourcomponentstotheamplier.
Speaker terminals -Youramplierhastwoout-
putchannels,theRightOutputandtheLeftOut-
put.
Each output channel is designed to handle one
speaker. Follow the instructions outlined in the
Operating Procedure for the correct speaker
connections.
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Premise
Controls and Their Functions
Stereo Integrated Tube Amplier

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TUBE REPLACEMENT
Your Premise Integrated amplier’s conservative
designmaximizeslifeofthetubes.
YoucanexpectthatyourEL84/6BQ5tubeswilllastin
excessof3000,whiletheECC81preamplivertubes
should last approximately 4000 hrs.
Lackingtheaccuratetimemeasurement,westrong-
ly recommend replacing the output tubes at 20-30
monthsinterval(dependingonyourlisteninghabits)
and signal tubes at every other power tube replace-
ment(every24-36months).
This will ensure that the amplier always performs
at its best and tube failure will not overstress other
parts.
Beforeyoustartreplacementyoushouldmakecer-
tain that the unit is turned off and disconnected from
the AC outlet and that the tubes have cooled down.
Allowsufcienttime,minimum30minutes,fortubes
to cool down and internal capacitors to discharge.
Before inserting a new tube, inspect the tube for
cracks and physical damage.
Makesurethatthepinsarestraight.Ifyouneedto
straighten the pins, be very careful as it may cause
the glass envelope to break, causing the tube to lose
thevacuumandfailassoonastheamplierispow-
eredon,possiblydamagingtheamplieraswell.
Also, make sure to inspect the tube sockets for cracks
and pin inserts. Carefully align the pins with the sock-
etandgentlyinsertthenewtube.Neverforceatube
into a socket. Should you decide to buy replacement
tubes from Trafomatic Audio, rest assured that they
were fully tested before the shipment.
Only EL84/6BQ5 power tubes can be used.
Regardingpreampliertubes,the ECC81cannotbe
replacedwithanyotherECCtubetype(ECC82,83,88).
No other types of tubes can be used as they may
cause damage to the amplier, which is not cov-
ered by the warranty.
We do not recommend frequent changes of the
tubes, as the sockets are sensitive mechanical
parts and are rated for relatively small number of
insertions.
Servicing
Becauseofitscarefuldesignandhighmanufactur-
ingstandards,yourampliershouldnormallyrequire
only minimal service to maintain its high level of per-
formance.
CAUTION
Lethal voltages are prvesent inside the amplier.
Do not remove the amplier’s bottom cover and
do not tamper with components inside the unit
even with the power turned off. Servicing should
be left only to authorized and trained personnel.
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Stereo Integrated Tube Amplier

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Trafomatic Audio
Trafomatic Audio
Premise
Technical Specications:
Stereo Integrated Tube Amplier
Stereo Integrated tube amplier
Class of operation: Push Pull class A Triode/ Ultralinerar mode
Tubes complement: 8xEL84,2xECC81
Inputs: CD, Tuner, Aux
Outputs: 4 , 8 ohms
Input sensitivity:0.85Vrms
THD: 0.25%-1W/1KHz
Bandwidth: 10Hz(-1dB)-50KHz(-3dB)
S/N ratio:88dB
Input impedance: 100K
Power consumption:250VA
Input voltage:230V/50Hz(100-120-220-240Vavailableonrequest)
Size:430x2900x1900mm
Weight:22kg

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Notes
Trafomatic Audio

Trafomatic Ltd.
AndijeHabusa15
11400Mladenovac,Serbia
www.trafomatic.com
Trafomatic Audio®is a registered trademark of the Trafomatic LTD.
Copyright2007-2012byTrafomatic.Allrightsreserved.
Trafomatic Audio