Goldmund TELOS 390.5 User manual

USER MANUAL
GOLDMUND TELOS 390.5
Integrated Amplifier

User manual –Goldmund TELOS 390.5 –INTEGRATED AMPLIFIER - 2 -
Thank you for purchasing the Goldmund TELOS 390.5 Integrated Amplifier.
You have acquired one of the best integrated amplifiers ever made for professional and domestic
uses. It incorporates the Goldmund TELOS amplifier technology. Please take some time to read
this manual. It may provide you with useful information to make your pleasure of listening to the
Telos 390.5 even higher.
INTRODUCTION
GOLDMUND Telos 390.5 Integrated 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.
The guiding principle at Goldmund is to produce a precise sound with the latest 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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W A R N I N G!
This high quality amplifier possesses new
technical features such as ultra-high band
width and computer linking which are
necessary for accurate transcription within
today’s best audio systems.
Only careful use can provide all the
satisfaction you are expecting.
All handling must be performed according to
the following instructions to avoid impairing the
amplifier’s performance.
Nevertheless, if the instructions are perfectly
carried out, you will notice that the use of the
GOLDMUND TELOS 390.5 is quite simple and
convenient.
IMPORTANT
PLEASE DO NOT CONNECT ANY CABLES
OR MOVE ANY PARTS BEFORE READING
THE FOLLOWING INSTRUCTIONS.

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Table of Contents
1UNPACKING 5
2CHOICE OF LOCATION & COOLING 5
3CONNECTIONS & LINE VOLTAGE ADJUSTMENTS 6
4AMPLIFIER CONTROLS 8
5 SOUND QUALITY OPTIMIZATION 9
6MAINTENANCE AND CLEANING 9
7TECHNICAL DATA 10

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1 UNPACKING
You will find within the custom packaging:
- The Telos 390.5 amplifier,
- The remote control & batteries (to be fitted before use),
- The power cord,
- This owner's manual.
Unpack the above-mentioned parts carefully.
Keep all packaging for future use.
WARNING
If you need to return the Telos 390.5 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 390.5 in transit. Use of
alternative packaging is likely to result in damage, invalidating warranty cover.
2 CHOICE OF LOCATION & COOLING
The Telos 390.5 integrated amplifier, like all high quality amplifiers, generates a lot of heat
when driven at high levels and therefore must be vented properly.
It is mandatory to allow proper cooling of the heat sinks.
Do not put temperature sensitive equipment on top of the Telos 390.5.

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3 CONNECTIONS & LINE VOLTAGE ADJUSTMENTS
Connect the power cord to the back of the integrated amplifier and plug it into the nearest
wall plug. For safety reasons, use only a 3 lugs grounded plug.
To get the best sound from the Telos 390.5, avoid any multi-way plugs or extension cords.
Connect a computer, CD/DVD or Blu-ray player to the back panel of the Goldmund Telos
390.5 integrated amplifier, using either the USB Audio (input 7), RCA Analog (inputs 1 to
4), RCA Digital or Toslink Optical connector (inputs 5 to 7).
The Telos 390.5 driver will automatically be installed on your computer when its input
source is connected for the first time with the USB audio connector.
It will then be identified as “Goldmund USB Audio” in all audio related software.
This installation is performed only at the first USB connection.
When the input source is connected, connect the speaker output binding posts to the
speaker using a high quality speaker cable.
Only one connection per input can be used at once.
The automatic input selection has been set so the USB Audio connector has the priority
over the other input. To use the digital or optical input, turn off the computer to which the
USB input on disconnected or unplug the USB connection. The converter will then
automatically detect the RCA/Optical Toslink connection and will switch to it.
AT T E N T I O N:
A residual high frequency noise may remain audible in some circumstances if an analog
input is left open and is selected. This disturbance has no effect on the amplifier but may be
avoided easily through the application of short-circuit plugs on all unused inputs.
OS compatible USB Audio Class 1.0
(i.e. Windows Vista/XP/2000, Mac OS
X, and Linux).
It supports up to 96 kHz /24 bits.

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3 CONNECTIONS & LINE VOLTAGE ADJUSTMENTS (Ctd.)
3.1 LINE VOLTAGE ADJUSTMENT
The Goldmund Telos 390.5 uses an internal power supply developed by Goldmund to
provide totally separate voltage between the USB part and the digital/analog circuitry.
Your power supply unit has been set to operate with the mains voltage of your area. Check
on the power supply voltage switch on the rear panel if there is any doubt. If you move after
purchasing the integrated amplifier to an area using a different AC mains voltage, you can
change the voltage yourself or consult your local Goldmund dealer for assistance in doing
so.
The voltage selector on the rear panel allows choosing between 220V (234V nominal) and
110V (117V nominal).
Please refer to the Technical Specifications at the end of this manual for the main line
voltage range.
In case the nominal line voltage in your country is out of range, please consult your local
Goldmund dealer for assistance.
The power supply unit can operate indifferently with both 50 and 60 Hz AC line.

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4 AMPLIFIER CONTROLS
The Telos 390.5 integrated amplifier is powered on using the switch located on the back
panel. In regular use this switch should be left ON at all times (see sound quality
optimization). The standby function of the remote control should be used to mute the signal
for safe removal of cables. When in standby mode the front panel operation locking LED
will blink intermittently.
The amplifier is powered OFF by switching the back panel switch to the OFF position. A
safety circuit switches the unit to mute to avoid any disturbance reaching the speakers.
MUTING
To mute the integrated amplifier output, press the "MUTE" key. The same operation
repeated brings back the amplifier to normal operation at the same volume as in operation
at the point the mute function was activated.
VOLUME ADJUSTMENT
The level control may be adjusted manually using the front panel knob or by using the +
and - buttons on the remote control.
SELECTOR
The selector knob selects one of seven available inputs (4 analog and 3 digital). Each step
clockwise selects the next input in sequence. Selection may also be made using the remote
control by pressing the key corresponding to the input on the remote control.
An orange locking led is lighted up when an analog input is selected or when a digital
source is connected to one of the 3 digital input.
BALANCE ADJUSTMENTS
The balance of the integrated amplifier may be adjusted using the “<< ; >>” BAL key press
on the remote controller. A point under the volume or under the input, on the display, will
show the balance right and left of the audio signal. This function is only accessible via the
remote control.

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4 AMPLIFIER CONTROLS (Ctd.)
OPENING VOLUME MEMORY
This function is only accessible via the remote control. It allows the volume to be
automatically set to the level fixed when the unit is turned ON.
To adjust the level, first select the desired output level, and then press MEMO on the
remote control.
If at any time during playback you wish to return to this level, just press the RESET button.
SERIAL PORT
The Telos 390.5 integrated amplifier can be controlled via a standard computer serial port,
please contact your Goldmund representative for more details.
5SOUND QUALITY OPTIMIZATION
WARM UP SONIC EFFECT
If the amplifier has been powered off for some time, the optimum sound quality is only
reached after some time. It may take 15 minutes for the amplifier to reach optimum
operating temperature, as the circuits have to warm up to around +55 degrees Celsius
(=131degrees Fahrenheit).
6 MAINTENANCE AND CLEANING
The Telos 390.5 amplifier usually requires no maintenance. Please contact your Goldmund
approved dealer if any maintenance should be required.
Always turn the power OFF before cleaning your amplifier.
To clean the external metal of the amplifier, always use a clean, soft, damp cloth. Dampen
it with water or a mild detergent solution. Avoid abrasive or harsh cleansers (e.g. products
containing sodium carbonate).
The identification plate is plated with precious metal. Simply clean it with a soft cloth,
without any chemical solution.
3
4
7

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7 TECHNICAL DATA
POWER SUPPLY
• Nominal line voltage: 117 or 234 V (switchable)
• Fuse 8A for 110V and 220V
• Input voltage range: +/- 10 %
POWER
• Nominal power: 2 X 210W on 8 Ohms before clipping
• Maximum voltage: 55V peak
These values are for both driven channels.
ANALOG INPUTS
• 4 x RCA analog input (Left & Right)
DIGITAL INPUTS
• 1 x Digital S/PDIF coaxial RCA 75 Ohms or Toslink Optical
• 1 x Digital S/PDIF coaxial RCA 75
• 1 x USB AUDIO
REAR PANEL CONNECTORS AND CONTROLS
• 2 x output binding posts Left & Right
• 1 x USB Audio connector
• ON/OFF power switch key
• Voltage input selector
• RS232 Command connector

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7 TECHNICAL DATA (Ctd.)
FREQUENCY RESPONSE
• +/- 0.5 dB, 20 - 20 kHz
• Typical phase error between channels: < 0.5 degrees
DISTORTION
Measured with 20 Hz - 20kHz bandwidth and 80 kHz signal:
• Static: THD + N ratio <0.002%
NOISE
•Signal-to noise ratio: > 120 dB at 0 dBFS
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)
SIZE AND WEIGHT
• 44 W x 43 H x 13 D (cm)
• Weight: 15 kg
WARRANTY
• 3 years parts and labor
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.
Rev B