Thrax Audio Teres Operating Manual

Teres

Mono Power Amplifier

by Thrax Audio

Operating Manual

Manual issued 30/11/2014

CAUTION

THE UNIT CONTAINS NO USER SERVICEABLE PARTS. DO NOT REMOVE THE COVERS. LETHAL
VOLTAGES ARE PRESENT WITHIN THE CHASSIS.

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

THE AMPLIFIER 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.

WARNING: Do not allow anything to touch the tube in normal operation – it becomes very
hot. Take care to keep everyone, especially children and pets, from being able to reach
and touch the tube, which becomes extremely hot and may cause serious injury. Never
touch a tube if the glass is broken. The internal structures carry high voltage and could
present a serious, possibly lethal shock. If a tube breaks, unplug the amplifier and wait 30
minutes, then remove the tube. Keep flammable objects away from the amplifier.

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

1. Important Safety Instructions …...................………….................................... 3

2. Introduction ………........................................................................................… 4

3. Specification ……..........................................................................................… 4

4. Unpacking and Installation

- Unpacking ……....................................................................................… 5

- Installation ……....................................................................................… 5

5. Front Panel ……..............................................................................................… 6

6. Back Panel

- Inputs …..…...........................................................................................… 7

- Speaker outputs ………......................................................................… 7

- AC Fuse …….........................................................................................… 7

- Battery ……...........................................................................................… 8

7. Operation ………...........................................................................................… 9

8. Tube replacement ………..........................................................................… 10

CONTENTS

2

READ ALL INSTRUCTIONS: All the safety and operating instructions of your Thrax Audio

equipment should be read before power is applied to the equipment.

RETAIN OWNER'S MANUAL: These safety and operating instructions should be retained

for future reference.

HEED WARNING: All warnings on the unit and in the operating instructions should be

adhered to.

FOLLOW INSTRUCTIONS: All operating and use instructions should be followed.

CLEANING: Unplug the unit from the wall outlet before cleaning. The unit should be

cleaned only as recommended by the manufacturer.

VENTILATION: Do not block any ventilation openings. Do not install near any heat sources

such as radiators, heat registers, stoves, or other apparatus (including amplifiers). The unit
should not be installed in a built-in location such as a bookcase or rack unless proper
ventilation is provided.

GROUNDING: Do not defeat the safety pu r pose of the gr o u n ding-type pl u g. 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 where they exit from the
apparatus.

LIGHTNING: Unplug this apparatus during lightning storms or when unused for long

periods of time.

SERVICING: Refer all servicing to qualified service personnel. Servicing is required when

the apparatus has been damaged in any way, such as if the power-supply cord or plug is
damaged, liquid has been spilled inside the appliance or it has been exposed to
moisture, the appliance does not operate normally, or has been dropped.

DO NOT OPEN THE CABINET: There are no user serviceable components inside this

product. Opening the cabinet may present a shock hazard, and any modification to the
product will void your warranty.

WARNING: To reduce the risk of fire or electric shock, do not expose this apparatus to rain

or moisture.

IMPORTANT SAFETY INSTRUCTIONS

3

Teres is a two stage hybrid power amplifier, a true high end audio product, a bridge
between solid-state power and vacuum tube finesse and resolution. The input stage
employs the legendary Siemens C3g tube with battery bias for super low noise and
extreme linearity. The output stage uses JFET/MOSFET cascodes in same polarity with
inverted phase and floating power supplies.

Signal path simplicity and zero feedback design brings unprecedented clarity and tone
richness with power to spare.

Features

2 inputs – one unbalanced on RCA and one balanced on XLR

Inside you get

Inside you get: Separate constant current PSU for the input tube and separate PSU for
the output stage. The input stage uses a property choke input rectifier and shunt
regulator power supply solution for super low noise and stability. The power supply uses a
new breed of rectifier diodes made of a new material called Silicon Carbide that have no
reverse current and switching loses.

INTRODUCTION

4

• Inputs

- 1 pair unbalanced RCA connector

- 1 pair balanced XLR connectors

• Output ………………...................................................….. 250W/8 Ω, 350W/4Ω

• Power supply ………………..................................................... …….. 115 or 230 V

• Power consumption …………….......................................................…….. 250W

• Dimensions ………………....................................…….. 230W x 400D x 340H mm

• Weight ………………............................................................................…….. 25Kg

• Finish ……..........................................…….. Black or Silver anodized aluminum

• Tube compliment :

- 1x C3g amplification

SPECIFICATION