Thrax Audio Libra Operating Manual Download Page 12 | Manualshive

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Summary of Contents for Libra

Page 1: ...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 REWARD...

Page 2: ...structions 3 2 Introduction 4 3 Specifications 5 4 Unpacking and Installation Unpacking 6 Installation 6 5 Front Panel 7 6 Back Panel AC Fuse 9 Inputs 9 Outputs 9 Tape output 10 9 Remote Control 11 8 Operation 12 CONTENTS 2 ...

Page 3: ...fety 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 w...

Page 4: ...triode operation with two independent outputs Features 6 inputs 3 XLR line inputs 1 XLR Tape Input and 2 RCA inputs 3 XLR Outputs 2 line outputs and 1 Tape Output 100 stepped volume control Tape Loop mode for use with tape recorders Home Theatre mode for assigning different settings to each output Inside you get Balanced differential topology for noise immunity and subtle dynamics Auto bias for co...

Page 5: ...onnectors Output 3 pair balanced XLR connectors Attenuation steps 100 Volume Control Range Minimum gain 100 to 12dB Power supply 115 or 230 V Power consumption 70W Dimensions 440W x 400D x 150H mm Weight 65Kg Finish Black or Silver anodized aluminum Tube compliment 4 x 300B Tube ...

Page 6: ...touch any metal parts such as the frame of an equipment 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 The outputs are XLR jacks IMPORTANT READ THE SECTIONS INPUTS OUTPUTS The unit should be operated only with th...

Page 7: ... on the main screen toggle between inputs by turning the Left Control Knob Volume Control Mute Turn the Right Control Knob to toggle volume level 0 100 Pressing it Mutes the device Menu Press Hold the Left Control Knob to access the Menu Menu Controls Left Control Knob Turn to navigate through Menu items Press to select highlighted Menu item Right Control Knob Turn to toggle a highlighted setting ...

Page 8: ...level each time you use that input The HT feature is just a handy way to make the level jump automatically to the same volume each time that input is selected NOTE In some systems switching to an unused input will cause a small amount of hum at the speakers This is because with no input connected the signal path is hanging in the breeze picking up whatever noise is floating by For unused inputs HT...

Page 9: ...OUT 2 1 XLR Inputs Right XLR Inputs Left RCA Inputs Right RCA Inputs Left XLR Outputs Right XLR Outputs Left Power Plugs Inputs 3x pair XLR for standard balanced connections to sources indicated 1 3 on the back panel 1x pair XLR for devices making use of the Tape Loop function indicated as TAPE IN on the back panel 2x pair RCA for standard unbalanced connections to sources Outputs 2x pair XLR for ...

Page 10: ...on toggles between mute and normal volume modes The mute will be cancelled when the volume is adjusted by the remote handset or by the volume knob on the front of the pre amp Volume Up Down The volume up and down buttons step the volume up or down 1 step about 2db per button press or if held down they continuously adjust volume Channel Use these buttons to select an input or to navigate through th...

Page 11: ...the amplifier for a long period we recommend turning it off using the power switch on the back panel to save power Refer to pages 7 9 of this manual for using the Menu 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 Libra Preamplifier has not been used for a few weeks the s...

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