Goldmund MIMESIS 27.8 User manual

USER MANUAL
GOLDMUND MIMESIS 27.8
Preamplifier

User manual –Goldmund MIMESIS 27.8 –PREAMPLIFIER - 2 -
Thank you for purchasing the Goldmund MIMESIS 27.8 preamplifier.
You have acquired one of the best preamplifier ever made for professional and domestic uses.
Please take some time to read this manual. It may provide you with useful information to make
your pleasure of listening to the Mimesis 27.8 even higher.
INTRODUCTION
GOLDMUND Mimesis 27.8 Preamplifier
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 preamplifier 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
preamplifier’s performance.
Nevertheless, if the instructions are perfectly
carried out, you will notice that the use of the
GOLDMUND MIMESIS 27.8 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
4PREAMPLIFIER 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 Mimesis 27.8 preamplifier,
- 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 Mimesis 27.8 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 Mimesis 27.8 in transit. Use
of alternative packaging is likely to result in damage, invalidating warranty cover.
2 CHOICE OF LOCATION & COOLING
The Goldmund Mimesis 27.8 preamplifier generates a significant amount of heat.
It is necessary to allow a proper cooling of the heat sinks. Avoid any location which is not
properly ventilated and avoid putting any equipment that is sensitive to temperature on top.

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3 CONNECTIONS & LINE VOLTAGE ADJUSTMENTS
Connect the power cord to the back of the preamplifier 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 preamplifier, avoid any multi-way plugs or extension cords.
Connect a computer, CD/DVD or Blu-ray player to the back panel of the Goldmund Mimesis
27.8 preamplifier, using either the USB Audio (input 7), RCA Analog (inputs 1 to 4), RCA
Digital or Toslink Optical connector (inputs 5 to 7).
The Mimesis 27.8 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 analog output RCA connectors to the
power amplifier analog input using a high quality analog cable like the Goldmund
Interconnect.
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 preamplifier 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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3CONNECTIONS & LINE VOLTAGE ADJUSTMENTS (Ctd.)
3.1 LINE VOLTAGE ADJUSTMENT
The Goldmund Mimesis 27.8 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 preamplifier 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 PREAMPLIFIER CONTROLS
The Mimesis 27.8 preamplifier 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 preamplifier 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 preamplifier output, press the "MUTE" key. The same operation repeated
brings back the preamplifier 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 preamplifier 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 PREAMPLIFIER 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 Mimesis 27.8 preamplifier 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 preamplifier has been powered off for some time, the optimum sound quality is only
reached after some time. It may take 15 minutes for the preamplifier to reach optimum
operating temperature, as the circuits have to warm up to around +55 degrees Celsius
(=131degrees Fahrenheit).
6 MAINTENANCE AND CLEANING
The Mimesis 27.8 preamplifier usually requires no maintenance. Please contact your
Goldmund approved dealer if any maintenance should be required.
Always turn the power OFF before cleaning your preamplifier.
To clean the external metal of the preamplifier, 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 2.5A for 110V and 220V
• Input voltage range: +/- 10 %
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 (up to 96 kHz /24 bits)
REAR PANEL CONNECTORS AND CONTROLS
• 1 x analog output RCA connector Left & Right
• 1 x USB Audio connector
• ON/OFF power switch key
• Voltage input selector
• RS232 Command connector
INPUT
• Input impedance: 50 kOhms
• Nominal input level: 2.25 V RMS
• Maximum input level (unbalanced): 3.6 V RMS
OUTPUT
• Output impedance: 75 Ohms
• Maximum output level (unbalanced): 3.6 V RMS

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7 TECHNICAL DATA (Ctd.)
FREQUENCY RESPONSE
These values for any level to maximum output level
• +/- 0.1 dB, 10 - 20 kHz
• +/- 1.5 dB, 10 - 100 kHz
• +/- 3 dB, 10 - 200 kHz
DISTORTION
With 1 V RMS output level, 80 KHz measurement bandwidth, 600 Ohms termination
impedance
• THD unbalanced in to unbalanced out < 0.005% (-90 dB) flat with frequency
• IMD unbalanced in to unbalanced out < 0.002% (-80 dB)
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: 12 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