USER MANUAL

GOLDMUND TELOS 350

Universal Power Amplifier

Thank you for purchasing the GOLDMUND TELOS 350.

You have acquired the best Universal Power Amplifier ever made for professional and domestic uses.

Please take some time to read this manual. It will provide you with useful information to make your pleasure of listening to the TELOS 350 even higher.

INTRODUCTION

GOLDMUND TELOS 350 – Universal Power Amplifier

Goldmund was founded in 1978 and has ever since been dedicated to the accurate reproduction of sound and image.

At Goldmund, we strive to lead in the creation, development and manufacture of the industry’s most advanced technologies, including audio and video systems, home - networking and music distribution.

The guiding principle at Goldmund is to produce a precise sound with the least possible loss of quality through the different stages. Goldmund will never adopt a technology before it is sufficiently developed to satisfy the high quality standards we set. This is why

Goldmund has often rejected mainstream technologies and developed its own.

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Table of Contents

1 UNPACKING

1 UNPACKING

2 AMPLIFIER LOCATION & COOLING

3 LINE VOLTAGE ADJUSTMENTS

4 CONNECTIONS

5 AMPLIFIER CONTROLS

6 SAFETY FEAT U R E S

7 MAINTENANCE

8 TECHNICAL DATA

8

9

12

13

14

4

5

6

7

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W A R N I N G !

No connection or manipulation must be done before reading these instructions. Damage to the amplifier may result if the following instructions are not consciously understood and applied.

These extremely high quality amplifiers possess new technical features which are a necessity for accurate sound reproduction in the best audio systems.

Only careful installation and use can provide the satisfaction you are expecting.

The installation instructions must be carried out in full and the mentioned precautions taken to get the expected result and to avoid impairing the amplifier’s performance.

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1 UNPACKING

You will find in the GOLDMUND TELOS 350 box:

- The amplifier

- The power cord

- This manual

Please keep the packaging in case you need to transport the amplifier at a later date.

IF YOU NEED TO RETURN THE TELOS 350 TO THE FACTORY OR TO YOUR LOCAL

REPRESENTATIVE FOR A WARRANTY REPAIR, PLEASE NOTE THAT IT MUST BE

REPACKED IN THE ORIGINAL PACKAGING.

THIS PACKAGING HAS BEEN DESIGNED SPECIFICALLY TO PROTECT YOUR TELOS

350 IN TRANSIT.

USE OF ALTERNATIVE PACKAGING IS LIKELY TO RESULT IN DAMAGE,

INVALIDATING WARRANTY COVER.

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2 AMPLIFIER LOCATION & COOLING

The GOLDMUND TELOS 350 amplifier, as all high quality amplifiers, generates a large amount of heat when driven at high levels and must be vented properly. It is mandatory to allow a proper cooling of the heat sinks. Do not put temperature sensitive equipment on top of the amplifier.

Due to its weight, and to maximize the effect of the built-in "Mechanical Grounding" construction, the TELOS 350 can be located on the floor or on other very strong supports if they offer rigid transmission to the floor.

The TELOS 350 is built on four rubber feet to ensure proper the amplifier support. This avoids all detrimental vibrations inside the amplifier, following the famous GOLDMUND

"Mechanical Grounding" principle.

If you use more than one TELOS 350 at any location, you may decide to stack them. You may stack up to 3 amps provided extra care is taken to ensure proper air circulation vents the side heat-sinks.

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3 LINE VOLTAGE ADJUSTMENTS

A voltage selection is provided inside the amplifier.

If your line voltage is not adapted to the voltage indicated on the serial plate of the amplifier, please consult your local GOLDMUND dealer for internal adjustment.

On the 220V configuration, the GOLDMUND TELOS 350 amplifier will function properly for main line voltage between 190V and 245V. On the 110V configuration, the main line must deliver between 95 and 125V. If your main line is usually out of these tolerances, please consult your GOLDMUND dealer.

Please check the value of the main line fuse. This fuse is located on the back panel of the amplifier, above the power cord receptacles.

Use a 16A delayed fuse.

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4 CONNECTIONS

Connect the power cord to the back of the amplifier and plug it into the nearest wall plug.

Use only a 3 lugs grounded plug, for safety reasons. To get the best sound from the amplifier, avoid any multiple plug or extension cord.

If used with an analog signal, connect the interconnect between the preamp and each power amp and position the Analog/Digital input switch to analog.

When used with a digital input signal, connect the digital input cable to the digital input and switch the input switch to digital. Since a digital Spdif cable carries 2 channels you may link the digital output to the next amplifier to transfer the second channel.

Connect the speaker cable to one of the red and black terminals in the back of the amplifier, or, if you use a Goldmund High Definition speaker cable, you can connect directly from the speaker cable to one of the coaxial plugs on the back panel of the amplifier, bypassing the amplifier adapter module of the speaker cable.

The 2 separate outputs (both 5 way post and coaxial) are connected internally in parallel.

They are provided to facilitate the connection in bi-wiring systems.

You may notice that the ground of the input plug and the black speaker terminal are the same polarity. The amplifier is non-inverting in phase.

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5 AMPLIFIER CONTROLS

As soon as the amplifier is connected to AC line and the amplifier has not detected an error previously, the yellow light on the amp front panel is ON.

The TELOS 350 may be powered on either manually (Manual Operation) or automatically when receiving a signal (Auto-Power Operation). This is selected internally by the small white 10-position circular selector located on the top circuit of the amplifier, close to the big capacitors.

There is 1 position for Manual operation and 9 for Auto-Power operation. Positions 1 through 8 enable various delays to be set. This supports powering-up a quantity of amplifiers without a big surge on the AC line.

Position 0: Manual Operation

Position 1: Power after 200ms

Position 2: Power after 400ms

Position 3: Power after 600ms

Position 4: Power after 800ms

Position 5: Power after 1s

Position 6: Power after 1.2s

Position 7: Power after 1.4s

Position 8: Power after 1.6s

Position 9: Power after 1.8s

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Power up sequence:

•

Progressive charge of high power capacitors to limit peak current on

AC line

•

Switch on high power supply on output stage

•

Wait stabilisation of high power supply

•

Unmute input

•

Unmute ouput

Power down sequence:

•

Mute ouput

•

Mute input

•

Switch off high power supply on output stage

•

Switch off main power

5 AMPLIFIER CONTROLS (Ctd.)

MANUAL OPERATIO N

On the front plate of the GOLDMUND TELOS 350 amplifier you will find one POWER green light, one LOCKED orange light and one ERROR red light.

When first connected to mains power the 3 leds flash ones to indicate AC line detected.

The orange led will flash twice (equal time on and off) to indicate the initialization, at the end of this sequence, the amplifier enters in STANDBY mode. The orange led flashes slowly.

Once in STANDBY mode, a short key press (<1 second) switches the amplifier ON, the green led will flash five times indicating the initialization in POWER UP mode. The green led is permanently illuminated in this mode.

If the digital input is not used, the orange led is turned off, showing there is no lock and the amp remains muted until a lock is found. With a digital input, the amp is immediately operational and the orange led illuminated

The amp may be returned to STANDBY mode with a short key press. A long key press (>2 seconds) takes the amplifier in POWER OFF mode.

If an error is detected the red Led will be illuminated. Once the cause of the error has been removed, the amplifier can be returned to STANDBY mode with a long key press.

These security features are provided to reduce the risk of accidental POWER ON or

POWER OFF and to protect the amplifier in ERROR mode.

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5 AMPLIFIER CONTROLS (Ctd.)

In AUTO-POWER mode, the amplifier is turned on automatically when receiving an audio signal.

This mode is useful when several amplifiers are used together in a multi-amp system or when the power amplifiers are not easily accessible.

If an abnormal situation is found by the TELOS 350, the front panel red lights may turn ON, and the power of the amplifier is instantaneously set OFF.

The left red Led indicates an over temperature situation.

The display indicates if the problem is an over-temperature situation, an HF oscillation or

DC signal has been detected or an overload (for example when output is short-circuited).

Before re-starting the amplifier, detect what caused the problem and remove the cause first.

The amplifier will remain OFF with a red led on until the user intervenes.

To unlock the amplifier from the error mode, press the power key for >2 seconds, or restart the power sequence.

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6 SAFETY FEAT U R E S

The GOLDMUND TELOS 350 amplifier provides features to protect the amplifier and the speakers against all mishandling or component failure. However precautions must be taken to avoid problems with a very high power amplifier.

Protection a gainst DC

The TELOS 350 is a DC-coupled amplifier. If the associated preamplifier is badly designed or defective (often true for tube preamps), the speakers could be damaged.

In such a case, the DC protection circuit of the TELOS 350 will automatically turn off the amplifier. This detection circuit is totally immune to any sonic effect.

To indicate that the amplifier has been turned off by the protection circuit, a red led will be displayed on the front panel.

When the source of DC offset is suppressed, turn ON the amplifier again.

In the same way, the speaker must be protected against a large amount of high frequency oscillations, if present, before and after to avoid any danger for the tweeters, even if these frequencies remain unnoticed.

The amplifier is by itself extremely stable. However some mishandling must be avoided in order to avoid any oscillation:

• Never plug an input cable into a power amp when it is turned on.

• Be careful to use only very high quality interconnects. If the ground connection becomes loose, there is a big danger of oscillation. Warranty is voided if this occurs.

• Never run the input and output (speaker) cables in parallel.

If the TELOS 350 detects excessive oscillation, the amplifier will be turned OFF automatically. You will have to suppress the source of oscillation and turn it ON again once the protection is activated.

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6 SAFETY FEATURES (Ctd.)

If for any reason (malfunction, too high level, too low load impedance) the temperature of the amplifier could reach a dangerous level and the TELOS 350 could be damaged.

To avoid this type of damage, if the temperature rises too high, a protection circuit switches the amplifier OFF automatically. A red front panel light indicates that the amplifier has been turned OFF by the protection circuit.

If this happens, let the amplifier cool for some time. We strongly recommend investigating the cause of the temperature gain before operating the amplifier again.

7 MAINTENANCE

The GOLDMUND TELOS 350 amplifier usually requires no maintenance.

Always turn the power OFF before cleaning your amplifier. Use a clean, soft, damp cloth to clean the amplifier surface. Dampen the cloth with water or a mild detergent solution.

Avoid abrasive or harsh cleansers (e.g. products containing sodium carbonate).

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8 TECHNICAL DATA

SAFETY FEATURES

•

AC voltage fuse: 16 A slow-blow

•

Over-heating: the amplifier stops when heat sink temperature exceeds 80°C

•

Overload: Amplifier stops when output current exceeds 25A peak

•

HF protection: Amplifier stops when oscillations are detected on output

•

DC protection: Amplifier stops when continues signal (DC) is higher than 5Vdc on output

FRONT PANEL CONTROLS

•

1 control key (ON/OFF)

•

Red led display for over-heating, DC offset or HF protection and overload

•

Green led display for Power ON, operating mode

•

Orange led display for signal connection and digital lock (blinking in standby)

REAR PANEL CONNECTORS AND CONTROLS

•

Universal socket 3 lugs with main fuse (16 A slow-blow)

•

USB Connector will provides access for future optional DSP board

•

Output speaker 1 x 5 ways post in parallel

•

Output speaker 1 x Coaxial connectors in parallel

•

Analog Input connector RCA

•

Digital Spdif input and output RCA connector (Alize 6 D/A converter)

•

Switch between analog or digital input

•

Switch right or left channel selection from the Spdif input

POWER

•

Maximum power (IEC60065): 300 Wrms on 8 Ω / 1%THD

•

Rated power consumption (IEC 60065 at 8 Ω ): 180 W.

•

Maximum power consumption: 490 W.

•

Nominal line voltage: 117, 234 V (selectable internally)

•

Input voltage range: +/- 10 %

•

4 toroidal transformers

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Information and product specifications contained in this manual are subject to change without prior notice. Updated versions of this manual will be posted on our website at www.goldmund.com

.

Please visit our support page at http://www.goldmund.com/support/register to register your Goldmund product for warranty.

8 TECHNICAL DATA (Ctd.)

BANDWIDTH

•

+/- 0.1 dB, 0 - 300 kHz

•

+/- 1 dB, 0 - 1000 kHz

•

+/- 3 dB, 0 - 3 MHz

DISTORTION

•

Static: THD < 0.05 % (test conditions: Vin = 1kHz @ 100mV, unweighted)

SPEED

•

Rise time: < 300 ns

OPERATING TEMPERATURE

•

Room temperature: -30 to +40 degrees Celsius (-22 to +104 degrees Fahrenheit)

•

Internal temperature: +45 to +65 degrees Celsius (+113 to +149 degrees

Fahrenheit)

POWER SUPPLY

•

Ultra fast power supply with 4 separate transformers and low impedance filtering capacitors.

MECHANICAL CONSTRUCTION & G R

•

Mechanical grounding optimum construction

•

Thermal grounding full implementation with gold-plated copper buffer plate

DIMENSIONS & WEIGHT

•

Dimensions: 305 W x 385 D x 230 H mm

•

Weight: 30Kg

WARRANTY

•

3 years parts and labor

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