ecler SAM612T Analogue Preamplifiers and Mixers User Manual

ecler SAM612T Analogue Preamplifiers and Mixers

IMPORTANT REMARK

• CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN
  WARNING: SHOCK HAZARD DO NOT OPEN

The lightning flash with the arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated “dangerous voltage” within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance.

• WARNING (If applicable): The terminals marked with the symbol of “ ” may be of sufficient magnitude to constitute a risk of electric shock. The external wiring connected to the terminals requires installation by an instructed person or the use of ready-made leads or cords.
• WARNING: To prevent fire or shock hazards, do not expose this equipment to rain or moisture.
• WARNING: An apparatus with Class I construction shall be connected to a main socket outlet with a protective earthing connection.

IMPORTANT SAFETY INSTRUCTIONS

1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with a dry cloth.
7. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.
8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades one wider than the other. A grounding-type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for the replacement of the obsolete outlet.
10. Protect the power cord from being walked on or pinched particularly at the plugs, convenience receptacles, and at the point where they exit from the apparatus.
11. Only use attachments/accessories specified by the manufacturer.
12. Unplug the apparatus during lightning sorts or when unused for long periods of time.
13. Refer all servicing to qualified personnel. Servicing is required when the apparatus has been damaged in any way, such as a power supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.
14. Disconnecting from mains: When switching off the POWER switch, all the functions and light indicators of the unit will be stopped, but fully disconnecting the device from mains is done by unplugging the power cable from the mains input socket. For this reason, it always shall remain easily accessible.
15. Equipment is connected to a socket outlet with earthing connection by means of a power cord.
16. The marking information is located at the bottom of the unit.
17. The apparatus shall not be exposed to dripping or splashing and no objects filled with liquids, such as vases, shall be placed on the apparatus.

NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense.

WARNING: This product must not be discarded, under any circumstance, as unsorted urban waste. Take it to the nearest electrical and electronic waste treatment center.

NEEC AUDIO BARCELONA, S.L. accepts no liability for any damage that may be caused to people, animals, or objects due to failure to comply with the warnings above.

IMPORTANT NOTE

Thank you for choosing our Ecler SAM612T Installation Analogue Mixer! It is VERY IMPORTANT to carefully read this manual and to fully understand its contents before any connection in order to maximize your use and get the best performance from this equipment. To ensure the optimal operation of this device, we strongly recommend that its maintenance be carried out by our authorized Technical Services. Ecler SAM612T comes with a 3-year warranty.

INTRODUCTION

Ecler SAM612T is an easy-to-use professional mixer designed for PA applications.

Main Features

• 6 MIC/LINE input channels (± 15dB gain)
• 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 an internal recovery time selector.
• 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 has to mute the mixer by activating this control signal (normally pen, NO).
• Mono / Stereo selector.

INSTALLATION

Ecler SAM612T has been specially designed to be installed in a standard 19″ rack, taking 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, SAM612T 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. Ecler SAM612T is powered by alternating current through its external power supply: 100-240 VAC and 50-60 Hz. This external PSU has interchangeable connectors: American, European, British and Chinese. In order to protect the mixer from eventual overloads, SAM612T is protected by a timed power fuse (21) 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.

INPUTS

Each SAM612T channel has two input types (MIC/mono, LINE/stereo), selectable using a switch on the back panel: Microphone signal (11): the 6 mixing channels are provided with screw terminal strips and accept a nominal input level from -50dBV (3.16mV) to –20dBV (0.1mV), ± 15dB gain to be adjusted on the back panel (14). There is also another jack input for the microphone on the front panel (1), connected in parallel with the one for the same channel on the back panel.

Wiring diagram for microphones:

Remark: Microphones must be low impedance (200 to 600 ) and monophonic. SAM612T has a Phantom power supply for condenser microphones, individually switchable by internal jumpers (for each microphone). Cf diagram. The Phantom power supply is disabled 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. Given the important level differences between usual LINE and CD sources, SAM612T provides ±15dB gain for each source. CD Players, DAT, MP3, and DVD Audio should be connected to the “LINE” inputs.

WARNING: Turntables CAN NOT be directly connected to this unit, because SAM612T has no RIAA preamp-equipped input. In addition, MIX IN (15) input directly accesses to the main mixing bus. It is especially useful to connect a second SAM612T or another mixer in order to increase the number of mixing channels and inputs.

OUTPUTS

Ecler SAM612T has two main outputs, with their type of connector as the only difference: electronically balanced screw terminal strips (17, 18) and unbalanced RCA connectors (16). Connection is made according to the following diagram:

In order to use an unbalanced 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, 10k .
• L+R switch (19): convert output signals into a mono signal.
• MUTE remote control input (20): external contact closure input, Normally Open (NO). Allows connection of fire detection systems or any other safety device that have to mute the mixer by activating this control signal.

STARTING UP

This is directly done via the POWER mains switch (10). Even is the power-up noise of SAM612T is minimal, we highly recommend powering 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.

EQUALIZATION

Tone controls (4, 5, 6) provide ±15 dB gain/attenuation for each of the three bands, centered on 100Hz, 2kHz, and 10kHz. Given this unit’s application philosophy, tone controls are designed to be set with a screwdriver, thereby preventing accidental manipulation during normal usage.

VU-METER

SAM612T has a VU-meter (9) to show the main mixing signal.

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. SAM612T was designed to produce the lowest background noise. Independently from the electronic 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 around. 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 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.

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.

DIAGRAMS

Control Panels Functions

1. Micro input, MIC
2. Talkover switch, TK
3. Channel volume control, VOL
4. Bass control, BASS
5. Midrange control, MIDv
6. Treble control, TREBLE
7. Output main volume control, OUTPUT VOL
8. LED indicator, MUTE
9. Led Vu-meter, MIX
10. LED indicator, ON
11. Micro input, MIC
12. Microphone input sensitivity adjust, ADJ
13. Micro line selector
14. Line input, LINE
15. Mix input, MIX
16. Recording output, REC
17. Mono-stereo switch, L+R
18. Main output, right channel, OUTPUT L
19. Main output, right channel, OUTPUT R
20. Screwable terminal for remote mute, MUTE
21. Mains socket
22. Fuse holder
23. Mains switch, POWER

Side position

Configuration Diagram

JUMPERS FACTORY ADJUST

• Phantom: OFF
• Output Sensitivity: 0dB

Block Diagram

TECHNICAL CHARACTERISTICS

SAM612T __

Inputs Sensitivity nom()/Impedance
IN 1-6 (LINE)| 0dBV/50kΩ
MIX (LINE)| 0dBV/10kΩ
IN 1-6 (MIC BAL)| -35dBV/>1kΩ
Input sensitivity adjust|
IN 1-6 (MIC/LINE)| ±15dB
Outputs Level/Minimum load|
OUT| 0(+6)dBV/600Ω
REC| 0dBV/10kΩ
Frequency response|
LINE| 10Hz-50kHz -1dB
MIC BAL| 10Hz-30kHz -1dB
Harmonic distortion|
LINE| <0.005%
MIC BAL| <0.04%
CMRR|
MIC| >60dB@1kHz
Signal/Noise ratio|
LINE| >100dB
MIC BAL| >85dB
Input Tone control|
BASS| 100Hz ±15dB
MID| 2kHz ±15dB
TREBLE| 10kHz ±15dB
Talkover|
TIME| 2 seconds
EFFECT| -30 dB
Phantom voltage| +18VDC
DC supply| ±17,5 VDC
Mains| 100-240VAC + External PSU 17,5VDC
Power consumption| 18VA
Dimensions|
Panel| 482.6x44mm
Depth| 120mm
Weight| 2.0kg

• internally selectable

All product characteristics are subject to variation due to production tolerances. NEEC AUDIO BARCELONA S.L. reserves the right to make changes or improvements in the design or manufacturing that may affect these product specifications. For technical queries contact your supplier, or distributor or complete the contact form on our website, in Support / Technical requests Motors, 166‐168 08038 Barcelona ‐ Spain ‐ (+34) 932238403 information@ecler.com www.ecler.com

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