Trafomatic Audio PRIMAVERA User manual

Brand: Trafomatic Audio

Model: PRIMAVERA

Category: Audio amplifiers

Type: User manual

www.trafomaticaudio.com Rev. 1

PRIMAVERA

Headphone Amplier

Table of Contents

Section Page No.

Safety Precautions 02

Getting Started 05

 AboutYourLinePreamplier   05

Packaging / Preparation for use 06

Controls and Their Functions 08

Front Panel 08

Rear Panel 10

Servicing 11

Technical Specications 12

Table of Contents

Section Page No.

Safety Precautions 02

Getting Started 05

 AboutYourLinePreamplier   05

Packaging / Preparation for use 06

Controls and Their Functions 08

Front Panel 08

Rear Panel 10

Servicing 11

Technical Specications 12

SAFETY PRECAUTIONS

IMPORTANT SAFEGUARDS

PLEASE READ CAREFULLY ALL THE

FOLLOWING IMPORTANT SAFE

GUARDS THAT ARE APPLICABLE TO

YOUR EQUIPMENT

CAUTION! TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE SCREWS. NO

USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PER-

SONNEL.

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 retained for

future reference.

3) Follow Instructions - All operating and instructions for use should be closely followed.

4) Power Sources - This product should be operated using only the type of power source indi-

cated on the marking label. If you are not sure of the type of power supply in your home, con

sult your product dealer or local power company.

5) Grounding - This product is equipped with a three prong IEC connector. 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 recep-

tacles 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 vacuum tubes get very hot. It is highly recommended that tube

cage is always installed to prevent inadvertent contact with the glass. Allow at least 10 min

utes after removing power for tubes to cool down.

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 unattend-

ed and unused for longer periods of time.

PRIMAVERA-HEADPHONEAmplier-User Manual

ENVIRONMENT

1) Water and Moisture. Do not use this product near water - i.e. near a bathtub, 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 sources such as radiators, heat regis-

ters, 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 an audio device to run warm if used for prolonged periods.

Always place your device away from children and pets to prevent burns.

2) Ventilation. Proper ventilation is critical for safe and reliable operation of all vacuum tube

based equipment. This product should not be placed in a built-in installation or rack unless

proper ventilation is provided or the manufacturer’s instructions have been followed. Never

placeanythingontopofyourpreamplierthatcouldobstructairowandcausevacuumtubes

tooverheatanddamagetheunit.Donotplaceyourpreamplierinaclosedbookcase;over

heatingcouldoccur.Ensurethatthereisatleast8”(200mm)ofopenspaceabovethepre

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excessivesmoke,dust,

vibration or shock.

MAINTENANCE

1) Cleaning.Unplugthisproductfromthewalloutletbeforecleaning.Donotuseliquidcleaners

oraerosolcleaners.Useadryclothforcleaning.Donotuseanytypeofabrasivepad,scour-

ingpowderorsolventsuchasalcoholorbenzene.

2) Tube replacement.Vacuumtubeshavelifeinthe5000hourrange.Werecommendreplac-

ing the tubes after 24-36 months, depending on your listening habits. That will ensure that the

preamplieralwaysperformsatitsbestandtubefailurewillnotoverstressotherpartsoftheunit.

3) Biasing the amplier. Biasing of the Primavera is not required.

SERVICE

1) Replacement Parts.Whenreplacementpartsarerequired,besurethattheservicetechni-

cianusesreplacementpartsspeciedbythemanufacturerorpartswiththesamecharacter-

isticsastheoriginalpart.Unauthorizedsubstitutionsmayresultinre,electricshockorother

hazards.

2) Tube replacement.Shoulditbecomenecessarytoreplacethevacuumtubes,removethe

ACpowerplugfromthewallandallowthirtyminutes(30min)forthehighvoltagecapacitors

to discharge. Follow instructions outlined below in the section “Handling vacuum tubes”.

3) Modications.Modicationstotheamplierarestronglydiscouraged.Theunitwasde-

signedbyexperiencedengineersandtestedforsafeandreliableoperation.Anymodication

may poses safety risk and result in reduced lifetime of the product. Any removal of the cover

will void warranty.

PRIMAVERA-HEADPHONEAmplier-User Manual

05 PRIMAVERA-HEADPHONEAmplier-User Manual

GETTING STARTED - ABOUT

YOUR HEADPHONE AMPLIFIER

Your Primavera Headphone Amplier was designed to provide a high value based on its high

performance,whichisaresultofacarefullydesignedcircuitandoptimizedcomponentselec-

tion. The design utilizes minimum number of active parts and top quality passive elements.

The Primavera’s impressive output power of 9W into 50 Ohms makes it capable of driving

the most demanding loads and its sound quality and striking design set it as an icon of a

modern high-end audio electronics.

Thedesignisbasedonanexcellentdirectheatedtriode(DHT)SV811-10inasingle-ended

conguration,drivenbyanexcellent6S45P(6C45Π)tube.Highcapacitypowersupplyisdomi-

nated by a custom, in-house made power transformer and choke. New generation of Trafomatic

Double-C core output transformers ensures maximum linearity and wide frequency response.

ThePrimaverahasbalanced(XLR)andunbalanced(RCA)inputs,andthefollowingheadphone

outputs:

One Neutrik 4-pin balanced connector,

TwoNeutrik3-pinXLRconnectors

One ¼” Neutrik connector

Outputimpedancecanbesetinthe25to600Ohmsrange,makingiteasytooptimizesound

quality for multitude of headphones.

HANDLING AND REPLACING VACUUM TUBES

Many people have never had experience handling vacuum tubes. Process is very similar to

hand incandescent light bulbs. As with the light bulbs, you should not touch a vacuum tube

whenitisoperatingsinceyoucanburnyourself.Similarly,ifatubeisdroppedonahardsurface

itmaybreakorchangecriticaloperatingparameters.Whenreplacingthetubesandremoving

theamplier’scover,allowsufcienttime,minimum 30 minutes, 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. 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ail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.

The Primavera is designed around the 6S45P (6C45Π) vacuum tube as a gain stage and

SV811-10 as the power tube.Whenthetubesaredueforreplacement,itisbesttousethe

same brand and model number.

ShouldyoudecidetobuyreplacementtubesfromTrafomatic Audio, rest assured that they are

fully tested before the shipment.

PACKAGING

Savetheoriginalpackaginginadryplace.Thepackaginghasbeendesignedtoprotectyour

devicefromstressesincurredduringshipping.Usingpackagingdifferentfromtheoriginalin-

creases risks of shipping damages

PREPARATION FOR USE

Placeyouramplieronaat,stablesurface.

Power switch, located on the left side of the unit should be in the OFF position.

Makesurethatthevoltageselectorswitch(locatedontherearpanel,nexttotheACinlet)

isproperlyset;thisswitchneedstobesetsothatthenumberdisplayed(115or230)corre-

sponds with the line voltage in your country.

Plug in the power cord.

Connect your audio source to the rear inputs of your Primavera. You may use balanced

(XLR)orunbalanced(RCA)inputs.Itisnotrecommendedtousebothsetsofinputsatthe

same time.

Ifsomeofyoursourcesrequiresignalgrounding(turntabletonearm,forexample),connect

thewiretothegroundinglug(GND)ontherearpaneloftheamplier.

Connect your headphones by using connectors on the front of the unit.

Make sure that volume control is set to minimum position.

Turn on the Primavera by using power switch located on the left side of the unit.

Slowlyincreasevolume,tomakesuretherearenounusualnoisescomingoutofthehead-

phones.

CONGRATULATIONS!YouareallsetandreadytoenjoyhighsoundqualityofthePrimavera

HeadphoneAmplier.

PRIMAVERA-HEADPHONEAmplier-User Manual

CONTROLS AND THEIR FUNCTIONS

FRONT PANEL

Volume control: regulates maximum outputs on headphone outputs.

Impedance selector: optimizesamplier’sperformanceforwiderangeofheadphones.

As a general rule, select the impedance that is the best match for the headphones that are being

used. It is possible to use different impedance setting, as that will result in slight changes in the

sound.Whilehighimpedanceheadphonescanbeusedwiththelowimpedancesettings;for

example, 300 ohms headphones can be used with Primavera set to 50 ohms, however, it is not

recommended that low impedance headphones are connected to the high impedance setting -

using 40ohm headphones with 300 ohm setting will results in loss of resolution and increased

distortion.

LEFT SIDE OF THE UNIT

Power ON/OFF switch: The switch turns the amplier ON and OFF

Whenturningontheamplier,makesurethatthevolumecontrolisatitsminimum.Theam-

plierwillbefullyfunctionalafteronly30seconds.However,asitwarmsupovertherst15

minutes of operation, you may notice subtle improvements in the sound quality.

Attheendofyourlisteningsession,makesuretoturntheamplieroff.Leavingitturnedon

does not improve sound quality and it reduces life of the vacuum tubes.

Theampliershouldalwaysbeturnedonandoffviaitsownpowerswitch.

PRIMAVERA-HEADPHONEAmplier-User Manual

Volume control Output Impedance selector knob

VU Meter

3 pin XLR connectors

Front view

4 pin XLR connector

6,3mm(1/4’) unbalanced

connector

CONTROLS AND THEIR FUNCTIONS

REAR PANEL

The only control on the rear panel is the line voltage selector switch located next to the

AC power inlet (AC INPUT). This switch needs to be set so that the number displayed

(115 or 230) corresponds with the line voltage in your country.

The rear panel also hosts:

Groundinglug(GND)

Unbalancedinputs(RCAconnectors)

Balancedinputs(NeutrikXLRconnectors)

Groundliftswitch(LIFTGND):insomecongurations,groundingofthesystemcancong-

ure so called “ground loops”. In certain situation, this causes increased hum in the system.

Groundliftswitchisusedtobreakthe“groundloop”whilemaintainingsafetyaffordedby

proper system grounding.

NOTE: never use the so called “cheater plugs” to remove ground from the system, as it

createspotentiallyhazardousconditions.

PRIMAVERA-HEADPHONEAmplier-User Manual

SERVICING

High quality parts and careful design of the Primavera ensure long and reliable operation

without need for any maintenance other than that listed in the MAINTENANCE section. In

an unlikely case that the unit does not operate as intended, please contact factory or your

local distributor for assistance.

CAUTION

Lethalvoltagesarepresentinsidetheamplier.Donotremovethepreamplier’scovers.Ser-

vicingoftheunitshouldbeperformedonlybyauthorizedservicepersonnel.

11 PRIMAVERA-HEADPHONEAmplier-User Manual

TECHNICAL SPECIFICATIONS:

PRIMAVERA-HEADPHONEAmplier

Class of operation: Single-EndedDHT(classA)

Tube complement: 2x6S45P,2xSV811-10

Input impedance: 47 K ohms

Input sensitivity: 0.5Veff

Headphone output impedance: 25 – 50 – 100 – 300 – 600 Ohms

Inputs: XLRandRCA

Outputs:

One Neutrik 4-pin balanced connector,

TwoNeutrik3-pinXLRconnectors

One ¼” Neutrik connector

Output Power: 9Winto50Ohm

Gain: 33dB

THD: 0.2%,at0.5Wand1kHz

S/N ratio: 88dB

Frequency bandwidth: 10Hz(-1dB)–80kHz(-3dB)

Input voltage: 230V/50Hz–115V/60Hzswitchable

Power consumption: 280VA

Size (WxDxH): 340x480x240 mm

Weight: 30 kg

PRIMAVERA-HEADPHONEAmplier-User Manual

www.trafomaticaudio.com

Trafomatic Audio PRIMAVERA User manual

Brand: Trafomatic Audio

Model: PRIMAVERA

Category: Audio amplifiers

Type: User manual

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Trafomatic Audio PRIMAVERA User manual

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