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Orpheus

Phono 

Pre

a

mplifier

 by Thrax Audio

Owner’s

 Manual

Manual issued 

05/03/2012

CAUTION

THE UNIT CONTAINS NO USER SERVICEABLE PARTS. DO NOT REMOVE THE COVERS. LETHAL 

VOLTAGES ARE PRESENT WITHIN THE CHASSIS.

NEVER OPERATE THE PREAMPLIFIER WITH THE CHASSIS COVERS REMOVED. 
DO NOT OPERATE THE UNIT IF WET OR NEAR WATER.

THE PREAMPLIFIER IS FAIRLY HEAVY. BE SURE TO USE PROPER LIFTING TECHNIQUES TO AVOID 

BACK STRAIN AND INJURY. BE CERTAIN TO INSTALL IT IN A SECURE LOCATION FROM WHICH 

IT CAN NOT FALL OR TIP OVER.

TIME SPENT FAMILIARIZING YOURSELF WITH THIS MANUAL WILL BE WELL  REWARDED.

Summary of Contents for Orpheus

Page 1: ...ITHIN THE CHASSIS NEVER OPERATE THE PREAMPLIFIER WITH THE CHASSIS COVERS REMOVED DO NOT OPERATE THE UNIT IF WET OR NEAR WATER THE PREAMPLIFIER IS FAIRLY HEAVY BE SURE TO USE PROPER LIFTING TECHNIQUES TO AVOID BACK STRAIN AND INJURY BE CERTAIN TO INSTALL IT IN A SECURE LOCATION FROM WHICH IT CAN NOT FALL OR TIP OVER TIME SPENT FAMILIARIZING YOURSELF WITH THIS MANUAL WILL BE WELL REWARDED ...

Page 2: ...mportant Safety Instructions 3 2 Introduction 4 3 Specifications 5 4 Unpacking and Installation Unpacking 6 Installation 6 5 Front Panel 7 6 Back Panel Inputs 8 Outputs 8 AC Fuse 8 7 Operation 9 CONTENTS 2 ...

Page 3: ...y purpose of the grounding type plug A grounding type plug has two blades and a third grounding prong The third prong is provided for your safety If the provided plug does not fit into your outlet consult an electrician for replacement of the obsolete outlet POWER CORD PROTECTION Protect the power cord from being walked on or pinched particularly at plugs convenience receptacles and the point wher...

Page 4: ...be compliment 2 x D3a amplification 2 x 6C4П 6S4P amplification 1 х 6Ц4П 6C4P rectifier Inputs 2 x RCA or XLR MM or MC phone cartridges Output RCA or XLR Power consumption 50W Dimensions 432W x 400D x 120H mm Weight 15 kg ...

Page 5: ...ntegral circuit reference To interface to both MC and MM type cartridges our design uses a built in Lundahl cobalt amorphous step up transformer for the MC types It is switchable for low and high impedance providing for appropriate load and gain to the wide variety of cartridges and is bypassed in MM mode Our input gain stage is based on a super low noise D3a German tube used as a triode It provid...

Page 6: ... rack This might create a parallel ground path that could degrade the sound of your system Connect the input and output cables Input connection is via single ended RCA jacks or XLR jacks which can be from balanced or unbalanced sources Output can be on RCA or XLR jacks and can be set for balanced or unbalanced loads with or without ground connection at the preamplifier IMPORTANT READ THE SECTIONS ...

Page 7: ...tton is pressed while source 1 is selected the source wraps around to source 3 The current source is indicated via a row of LED s between the source buttons Source Up Button Each button press changes the selected source to the next higher source If this button is pressed while source 3 is selected the source wraps around to source 1 Source LED s A row of 3 LED s between the source buttons They ind...

Page 8: ...ct your Orpheus phono preamplifier to a line preamplifier using the set of RCA output jacks or the pair of XLR output jacks The OUTPUT MODE switch must be set accordingly Do not connect an unbalanced load with pin 3 hot to the XLR connectors You may also choose RCA UNGND if it is necessary to break a ground loop AC Fuse Please note that there is one fuse located in the IEC power connector For 220 ...

Page 9: ... period we recommend turning it off using the power switch on the back panel to save power As with all high fidelity products the sound characteristic changes somewhat as it warms up Best sound will be achieved after about 15 minutes of operation Any time that the Orpheus phono preamplifier has not been used for a few weeks the sound may be different This is also normal for high resolution audio e...

Page 10: ...NOTES ...

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