Ecler SAM412T User Manual [en, de, es, fr]

USER MANUAL
MANUAL DE INSTRUCCIONES
NOTICE D'UTILISATION
BEDIENUNGSANLEITUNG

SAM412T

INSTRUCTION MANUAL

1. IMPORTANT REMARK 04

1.1. Safety Precautions 04

2. INTRODUCTION 04

3. INSTALLATION 05

4. INPUTS 05

5. OUTPUTS 06

6. CONSIDERATIONS 07

6.1. Starting Up 07

6.2. Equalization 07

6.3. VU-meter 07

6.4. Ground loops, background noise 07

6.5. Cleaning 07

7. TECHNICAL CHARACTERISTICS 23

8. DIAGRAMS 24

8.1. Function list 24

8.2. Function diagram 25

8.3. Configuration diagram 26

8.4. Block diagram 27

All numbers subject to variation due to production tolerances. ECLER SA reserves the right to make changes or
improvements in manufacturing or design which may affect specifications.

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1. IMPORTANT REMARK
We thank you for trusting on us and choosing our SAM412T mixer. In order to get the most in

operation and efficiency from your mixing unit, it is VERY IMPORTANT for you - before you plug anything ­to read this manual very carefully and take seriously into account all considerations specified within it.
In order to guarantee the optimum operation of this unit, we strongly recommend that its
maintenance be carried out by our Authorised Technical Services.

1.1. Safety Precautions
This apparatus must be earthed through its mains cable.

Do not expose the unit to rain or water splashes, and do not place liquid containers or
incandescent objects like candles on top of the unit.

Any change in the configuration of the unit must be carried out by a qualified technician.
Should any connection / disconnection task be done, always disconnect the unit from the mains

supply.

There are no user serviceable parts inside the unit.

2. INTRODUCTION

The SAM412T is an easy-to-use professional mixer designed for PA applications. Its main features

are:

• 4 MIC/LINE input channels.

• Adjustable microphone sensitivity on the back panel.

• +18 V DC Phantom power supply available for all "MIC" inputs.

• Direct microphone input on the front panel, channel 1.

• Included Talkover assigned to input 1, with in t ernal re c o v e r y time se l e c t o r.

• 3-Band tone controls, adjustable with a screwdriver.

• Mix output VU-meter.

• Main output level control.

• Record output.

• "MIX" input to connect another mixer or equipment.

• "MUTE" remote control input: allows connection of fire detection systems or any other safety

device that have to mute the mixer by activating this control signal (internally selectable as "NO /
NC", normally open / normally closed).

• Mono / Stereo selector.

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3. INSTALLATION

The SAM412T mixer has been specially designed to be installed in a standard 19" rack, takin g up
1U. It has been designed to be operated by non-technical users. This is the reason why its tone controls
are adjustable only with a screwdriver. On the opposite, input and output level controls use classic and
easily accessible rotary knobs.
Due to its low power consumption and heat sink, the SAM412T doesn't need any fan cooling.
However, avoid installing it in dusty environments and/or in a location with extreme temperature and
moisture.
The mixer should be kept apart from noise and interference sources (dimmers, motors, etc...) as
well as from power cables.

The SAM412T operates from 90V to 264V CA, 47 to 63Hz. Its oversized power supply is

compatible with any mains voltage worldwide.

In order to protect the mixer from eventual overloads, the SAM412T is protected by a timered

power fuse (23) of 0.5A. If it gets blown up, you must replace it with an identical one. If it gets blown up,
you must replace it with an identical one. NEVER REPLACE THE FUSE WITH ANOTHER ONE WITH A
HIGHER VALUE.

CAUTION: Fuse substitutions have to be performed by a qualified technician.

4. INPUTS

Each SAM412T channel has two input types (MIC/mono, LINE/stereo), selectable using a switch on

the back panel:

• Microphone signal (11): the four mixing channels are provided with screw terminal strips and accept
a nominal input level from -50dBV (3.16mV) to –20dBV (0.1mV), to be adjusted on the back panel
(12).
There is also another jack input for microphone on the front panel (1), connected in parallel with the
one for the same channel on the back panel.

Here is the wiring diagram for microphones:

Microphones must be low impedance (200 to 600Ω) and monophonic.

The SAM412T have a Phantom power supply for condenser microphones, individually switchable

by internal jumpers (for each microphone). Cf diagram. The Phantom power supply is activated by default
(factory setting).

The Talkover function is activated when a signal presence is detected on Input 1. Then it

attenuates the other unit inputs. It can be activated/deactivated by the "TK" switch (2), located on the
front panel.

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• Line signal (14): stereo RCA inputs, compatible with CD, DAT, MP3, DVD-Audio players, etc..
All these inputs accept 0dBV (1V) line level signals.

Turntables CAN NOT be directly connected to this unit, because SAM412T has no RIAA preamp

equipped input.

In addition, MIX IN (15) input directly access to the main mixing bus. It is especially useful to

connect a second SAM412T or another mixer in order to increase the number of mixing channels and
inputs.

5. OUTPUTS

The SAM412T has two main outputs, with their type of connector as only difference: electronically

balanced screw terminal strips (17, 18) and unbalanced RCA connectors (20).

Connection is made according to the following diagram:

In order to use a balanced output, you need to short pin 2 and pin 3, as indicated in the previous
diagram. Otherwise, the output signal won't have the right level and quality.

The mixer's main output level (OUTPUT VOL (7)) must be set in order to avoid your system power
amp clipping indicators (CLIP) to be permanently lit. Only the most powerful lower frequencies must light
them.

Other connections on the back panel:

• REC output (16), 0dBV nominal, 10kΩ.

• L+R switch (19): convert output signals in a mono signal.

• MUTE remote control input (21): external contact closure input. Allows connection of fire detection

systems or any other safety device that have to mute the mixer by activating this control signal. The
operating mode is internally selectable by jumpers as "NO / NC" (normally open / normally closed).

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6. CONSIDERATIONS

6.1. Starting up

This is directly done via the POWER mains switch (10). Even is the power-up noise of SAM412T is

minimal, we highly recommend to power up all equipment in the following order: sound sources, mixing
units, equalizer, processors and finally power amplifiers. The power down sequence is the inverse of the
power up one.

6.2. Equalization

Tone controls (4, 5, 6) provide ±15 dB gain/attenuation for each of the three bands, centered on

100Hz, 2kHz and 10kHz. Given th is unit's application philosophy, tone controls are designed to be set
with a screwdriver, thereby preventing accidental manipulation during normal usage.

6.3. VU-meter

The SAM412T has a VU-meter (9) to show the main mixing signal.

6.4. Ground loops, background noise
You should always make sure that the signal sources coming to the unit, as well as all devices

connected to its outputs, do not have their grounds interconnected, that is; ground must never come from
two different devices. Should this ever happen, noises could occur and seriously interfere the sound quality.

Cable shields, when connected to the chassis, must never be linked together. This will avoid

ground loops.

The SAM412T mixer was designed to produce the lowest background noise. Independently from

the el ectronic design, the resulting background noise directly relies on the correct use and installation of
the mixing unit.
I. e.: setting a channel VOL to "2" and the output to "10" is not the same as the other way round. In
the first case, the signal coming to the mixing amplifier - which has got its own noise - is low, and so is the
signal-to-noise ratio (low signal). When the output amplifier boosts the whole signal we will get a very high
background noise. In the second case - with the channel fader at maximum - the mixing level is high, and
so is the signal-to-noise ratio. When the signal reaches the VOL OUTPUT and is boosted, it will keep a
much better signal-to-noise ratio than in the preceding case.

6.5. Cleaning
The front panel should not be cleaned with dissolvent or abrasive substances because silk-

printing could be damaged. To clean it, use a soft cloth slightly wet with water and neutral liquid soap;
dry it with a clean cloth. Be careful that water never gets into the unit through the holes of the front panel.

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MANUAL DE INSTRUCCIONES

1. NOTA IMPORTANTE 09

1.1. Precauciones 09

2. INTRODUCCIÓN 09

3. INSTALACIÓN 10

4. ENTRADAS 10

5. SALIDAS 11

6. CONSIDERACIONES 12

6.1. Puesta en funcionamiento 12

6.2. Ecualización 12

6.3. Vu-metro 12

6.4. Bucles de masa, ruido de fondo 12

6.5. Limpieza 12

7. CARACTERÍSTICAS TÉCNICAS 23

8. DIAGRAMAS 24

8.1. Lista de funciones 24

8.2. Diagrama de funciones 25

8.3. Diagrama de configuración 26

8.4. Diagrama de bloques 27

Todos los datos están sujetos a variación debida a tolerancias de producción. ECLER S.A. se reserva el derecho de
realizar cambios o mejoras en la fabricación o diseño que pudieran afectar las especificaciones.

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1. NOTA IMPORTANTE
Agradecemos su confianza por haber elegido nuestro mezclador SAM412T. Para conseguir la

máxima operatividad y rendimiento del mezclador es MUY IMPORTANTE antes de su conexión leer
detenidamente y tener muy presentes las consideraciones que en este manual se especifican.
Para garantizar el óptimo funcionamiento de este aparato recomendamos que su mantenimiento
sea llevado a cabo por nuestros Servicios Técnicos autorizados.

1.1. Precauciones
Este aparato debe ser conectado a tierra mediante su cable de alimentación.

No exponga el aparato a la caída de agua o salpicaduras, no ponga encima objetos con líquido ni
fuentes de llama desnuda, como velas.

Cualquier cambio en la configuración debe ser realizada por personal técnico cualificado.

En caso de requerir alguna intervención y / o conexión desconexión del aparato debe
desconectarse previamente de la alimentación.
En el interior del aparato no existen elementos manipulables por el usuario.

2. INTRODUCCIÓN
El SAM412T es un mezclador profesional de sencilla manipulación diseñado para aplicaciones de

sonorización. Estas son sus características principales:

• 4 canales de entrada MICRO / LÍNEA.

• Nivel de sensibilidad de micrófono ajustable en el panel posterior.

• +18 V DC de alimentación Phantom disponible en todas las entradas "MIC".

• Entrada directa de micrófono en panel frontal, canal 1.

• Incluye Talkover asignado a la entrada 1, con selector interno del tiempo de recuperación.

• Controles de tono de tres bandas por cada canal, accesibles mediante destornillador.

• Vu-metro para la señal de mezcla.

• Control de nivel de salida principal.

• Salida de grabación.

• Entrada “MIX” para la conexión de otro mezclador o equipo.

• Entrada de control remoto "MUTE": permite la conexión de sistemas de detección de fuego u

otros dispositivos de seguridad que deban enmudecer el mezclador al activarse dicha señal de

control (configurable internamente "NO / NC", normalmente abierto, normalmente cerrado).

• Selector mono / estéreo.

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