Goldmund METIS 2 Manual de usuario

USER MANUAL

GOLDMUND METIS 2

Analog Preamplifier

Thank you for purchasing the GOLDMUND METIS 2 Analog Preamplifier. The Goldmund Metis

line amplifiers fully incorporate the technological expertise developed by our company throughout

many years. Please take some time to read this manual. It may provide you with useful information

to make your pleasure of listening to the METIS 2 even higher.

INTRODUCTION

GOLDMUND METIS 2 - Analog 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, 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.

GOLDMUND METIS 2 - Analog Preamplifier - 3

Table of Contents

1 SETTING UP THE METIS 2 5

2 FIRST INSTALLATION & CONNECTIONS 7

4 SOUND QUALITY OPTIMIZATION 9

5 CLEANING 9

6 TECHNICAL SPECIFICATIONS 10

GOLDMUND METIS 2 - Analog Preamplifier - 4

W A R N I N G !

No connection or manipulation may be done

before reading these instructions. Damage to

the analog preamplifier may result if the

following instructions are not understood and

applied.

This high quality analog preamplifier

possesses new technical features like ultra-

high bandwidth which are becoming necessary

for an accurate transcription of today’s best

analog messages in complete systems with

video, computer and audio associated

components.

Only a careful use can provide all the

satisfaction you are expecting.

All handling must be performed according to

the following instructions to avoid the

preamplifier deterioration

Nevertheless, if the instructions are perfectly

carried out, you will notice that the use of the

Goldmund METIS 2 is quite simple and

convenient.

GOLDMUND METIS 2 - Analog Preamplifier - 5

1 SETTING UP THE METIS 2

Please read very carefully the following instructions. This high-precision preamplifier will

provide the best analog signal possible thanks to its unique circuitry.

For exacting technicians, musicians, and all amateurs who demand the very best in

recording transcription, we strongly recommend the use of a top quality D/A converter to

decode the today’s high definition digital signals.

The connections between the analog sources and the preamplifier are critical. Ultra low

reflection cables are absolutely mandatory. Goldmund recommends using the Goldmund

Interconnect cables.

1.1 UNPACKING

You will find in the Goldmund Metis 2 box:

- The preamplifier

- The power cord

- The remote-control transmitter

- This manual

ATTENTION

Please keep the packaging in case you need to transport the METIS 2 at a later date or if

you have to send it for maintenance.

This packaging has been designed specifically to protect the METIS 2 in transit. Use of

alternative packaging is likely to result in damage, invalidating warranty cover.

GOLDMUND METIS 2 - Analog Preamplifier - 6

1 SETTING UP THE METIS 2 (Ctd.)

1.2 CHOICE OF THE PREAMPLIFIER LOCATION

The Goldmund Metis 2 preamplifier generates a significant amount of heat.

It is necessary to allow a proper cooling of the unit. Avoid any location which is not properly

ventilated and avoid placing the Metis 2 on top of any equipment that is generating high

temperature.

1.3 LINE VOLTAGE ADJUSTMENT

A voltage selector is provided on the back plate of the preamplifier. Adjust it with a

screwdriver if the line voltage provided is not appropriate.

ATTENTION: On the 220V position, the Goldmund Metis 2 preamplifier will function

properly for main line voltage in between 200V and 250V. On the 110V position, the main

line must deliver between 105 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 power cord

receptacle. The lid can be removed with a small screwdriver when the cord is removed.

Use a 500mA slow-blow fuse for 220V and 110V.

GOLDMUND METIS 2 - Analog Preamplifier - 7

2 FIRST INSTALLATION & CONNECTIONS

2.1. POWER CONNECTION

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

plug. Use only a 3 lugs grounded plug, for safety and noise reasons. To get the best sound

of the preamplifier, avoid any multiple plugs or an extension cords.

If the preamplifier is the logical center of your system and you use a star grounding

configuration, you may have to use the earth connection of the AC plug and lift the earth

connection of the other equipment.

2.2. SOURCES CONNECTION

Connect the interconnects between the preamplifier analog outputs and the power amp.

You will plug the cables to the RCA female sockets noted outputs.

Connect the interconnects from the analog source devices to the line inputs number 1 to 5.

Note: a residual High Frequency noise may remain audible in some circumstances when

an input is left open and is selected. This disturbance has no effect on the preamplifier but

may be avoided easily by short-circuiting plugs applied to all the unused inputs.

GOLDMUND METIS 2 - Analog Preamplifier - 8

3 FRONT & BACK PANELS FUNCTIONS

POWER

On the back panel of the Goldmund Metis 2 preamplifier the switch is used to power the

preamplifier on. In regular use, this switch is left ON and the circuits of the preamplifier are

left ON. The muting function of the remote control is only shorting the output to ground for

safe removal of the cables to the power amplifier.

The preamp can be powered off by switching the switch to the OFF position.

However, to optimize the sound quality of the preamplifier and insure the best reliability,

Goldmund recommends that the unit is left powered ON.

MUTING

Muting is controlled from the remote control. It can be used to temporarily turn the volume

down without touching the volume control. When returned to normal, the level of the

preamplifier is returned to where it was when the muting was activated.

VOLUME

May be adjusted manually by turning the volume control or on the remote by VOLUME + or

SELECTOR

Selects one of the available inputs for listening. A step clockwise is selecting the next input;

a step counterclockwise selects the previous input. A display on the front panel shows the

number of the input selected. Selection may be also made on the remote by pressing the

key corresponding to the input on the Analog section of the remote.

GOLDMUND METIS 2 - Analog Preamplifier - 9

4 SOUND QUALITY OPTIMIZATION

WARM-UP SONIC EFFECT

If the preamplifier has been left unpowered for a few days, the optimum sound quality is

only reached after a few hours. This is why Goldmund recommends leaving the METIS 2

powered on.

5 CLEANING

The Goldmund Metis 2 preamplifier usually requires no maintenance.

To clean your Metis, use a soft and slightly wet cloth. Always turn the power off before

cleaning your preamplifier.

GOLDMUND METIS 2 - Analog Preamplifier - 10

6 TECHNICAL SPECIFICATIONS

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

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

GROUP DELAY

•Propagation delay < 1 ms stable with frequency from DC to 100 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)

SPEED

•Slew rate of the amplification stages: > 20 V/us

•Rise time: < 700 ns

CROSSTALK

•Separation: > 80 dB between channels. (20 Hz – 20 kHz)

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