Goldmund TELOS 500 User manual

USER MANUAL
GOLDMUND TELOS 500
Universal Power Amplifier

Thank you for purchasing the GOLDMUND TELOS 500.
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 500 even higher.
INTRODUCTION
GOLDMUND TELOS 500 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 5
2 AMPLIFIER LOCATION & COOLING 6
3 LINE VOLTAGE ADJUSTMENTS 7
4 CONNECTIONS 8
5 AMPLIFIER CONTROLS 9
6 SOUND QUALITY OPTIMIZATION 12
7 SAFETY FEATURES 14
8 MAINTENANCE 16
9 TECHNICAL SPECIFICATIONS 16

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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 500 box:
- The amplifier
- The power cord
- This manual
ATTENTION
IF YOU NEED TO RETURN THE TELOS 500 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
500 IN TRANSIT.
USE OF ALTERNATIVE PACKAGING IS LIKELY TO RESULT IN DAMAGE,
INVALIDATING WARRANTY COVER.
Please keep the packaging in case you need to transport the amplifier at a later date.

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2 AMPLIFIER LOCATION & COOLING
The GOLDMUND TELOS 500 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 500 is better located on the floor. Other very strong supports can
be used if they offer rigid transmission to the floor.
The TELOS 500 is built on four very hard conical feet to ensure proper vibration
transmission to the amplifier support. This evacuates all detrimental vibrations inside the
amplifier, following the famous GOLDMUND "Mechanical Grounding" principle.
If you use more than one TELOS 500 at any location, you may decide to stack them. Be
careful that the conical feet of the top amp are inserted properly on the top of the steel bars
of the amplifier located below. You may stack up to 3 amps provided extra care is taken to
ensure proper air circulation vents the rear heat-sinks.
Depending on the flatness of the surface where the amplifier will be located, you will adjust
the four round flat feet of the amplifier to allow full contact of the points with the support.

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3 LINE VOLTAGE ADJUSTMENTS
A voltage selector 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.
ATTENTION
On the 220V configuration, the GOLDMUND TELOS 500 amplifier will function properly for
main line voltage between 211V and 257V. On the 110V configuration, the main line must
deliver between 105 and 129V. 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 two 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. You may either use the
RCA female socket or the XLR. The XLR socket, especially useful in professional
installations, is wired as follows:
1. Grounding, Shielding
2. Hot
3. Cold
ATTENTION
If you want to use a symmetrical 4 wire cable, never maintain the ground/earth
switch to "Float" or you may damage your amplifier.
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 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 the coaxial plugs on the back panel of the amplifier, bypassing the
amplifier adapter module of the speaker cable.
The output (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 (see page 12).

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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 500 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 one position for Manual Operation and 9 for Auto-Power Operation with various
delays to power a number 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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5 AMPLIFIER CONTROLS (Ctd.)
MANUAL OPERATION
On the front plate of the GOLDMUND TELOS 500 amplifier you will find only two POWER
keys.
In the Manual Operation mode, the two POWER keys have to be activated simultaneously
to power the amplifier on.
This security feature is provided to avoid accidental POWER ON or POWER OFF.
When the two keys are pressed simultaneously, the amp switches on in "Operating" mode
and the center green led lights on showing the amp is POWERED ON.
If the digital input is used, the yellow led may flicker, showing there is no lock and the
amplifier remains muted until a lock is found.
With an analog input, the amplifier is immediately operational.
By pressing the right key once, the amplifier is put in Mute mode, and the green led
flickers.
By pressing the right key once again, the amplifier returns to "Operating" state.
The amp may be POWERED OFF by pressing the two POWER keys simultaneously at
anytime.