Ecler MAC70i User manual

USER MANUAL

MANUAL DE INSTRUCCIONES

NOTICE D’EMPLOI

BEDIENUNGSANLEITUNG

E

C

LER

AUDIO CREATIVE POWER

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INSTRUCTIONS MANUAL MAC70i

1. IMPORTANT REMARK 04

2. INTRODUCTION 04

3. INSTALLATION 04

3.1. Placement and mounting 04

3.2. Connectable signal sources 05

4. OPERATION AND USAGE 06

4.1. Start up 06

4.2. Monitoring 06

4.3. Channel gain and equalization 06

4.4. Use of the CROSSFADER 07

4.5. Outputs 07

4.6. Talkover 08

4.7. Internal adjustments 08

4.7.1. Input sensitivity adjustment 08

4.7.2. Output sensitivity adjustment 09

5. CONSIDERATIONS 09

5.1. Ground loops 09

5.2. Audio connections 09

5.3. Background noise 09

5.4. Cleaning 10

6. TECHNICAL CHARACTERISTICS 36

7. DIAGRAMS 37

7.1. Talkover or Program assign 37

7.2. AUX input assign to bus 37

7.3. Function list 38

7.4. Function diagram 40

7.5. Block diagram 41

All numbers subject to variation due to production tolerances. ECLER S.A. reserves the right to make changes or

improvements in manufacturing or design which may affect specifications.

4

1. IMPORTANT REMARK

Congratulations! You are the owner of a carefully designed and manufactured equipment.

We thank you for trusting on us and choosing our mixer MAC70i.

In order to obtain the maximum performance of this unit, It is VERY IMPORTANT that you

read this manual before connecting the mixer.

We recommend our authorised Technical Services if any maintenance task should be

needed so that optimum operation shall be achieved.

2. INTRODUCTION

The MAC70i mixer is designed for its use in discotheques, ballrooms, bars, disco bars and

external p.a. applications.

The MAC70i has 7 mixable channels, with 10 stereo inputs: 3 PHONO, 3 CD (compact

disc), 3 LINE and an AUXiliar; plus 3 more inputs for balanced microphones.

All channels have a lever switcher input selector, independent gain control for each input,

as well as 3-band tone controls. The MAC70i also has a removable, externally exchangeable

CROSSFADER, assignable to channels 3,5 and 4,6 for an easier DJ mixing.

All inputs are PFL-capable in order to visually (through the VU meters) and acoustically

(through headphones) monitor any signal connected to the unit's inputs.

The MAC70i has a seventh auxiliar input, AUX INPUT, to which you can connect any

signal source or effect unit that generates line levels (see 3.2.). This seventh channel is only different

form the other channels in that it doesn't have any input selector and the potentiometer is a rotary

knob instead of a sliding fader.

In the MAC70i, we have cared specially about the roughness, long-time response and

maximum adaptability to the DJ needs, getting a total ease of operation.

3. INSTALLATION

3.1. Placement and mounting

The first thing to take into account when looking for the placement of the MAC70i is your

comfort and an easy access to all the connections.

The MAC70i has 19" (482.6 mm), 7U (310.5 mm) rack mounting ears that allow you to

place it in a standard rack.

In case you want to install it into a table or a base you should make a hole of 445x300mm.

Keep in mind that all the connections are made on the back panel, so enough space must be

provided for the connection. The thickness of the table or base must not be larger than 20 mm, else

there would not be any physical space left for the connections.

Because of the high gain of the PHONO and MIC inputs, the mixer must be placed as far

as possible from noise sources (dimmers, engines, etc.) as well as from any mains cable. You

should never, under any circumstance, remove the metallic cover of the mixer.

The MAC70i, being a low consumption unit, does not need any cooling; you should

anyway avoid exposure to extreme temperatures and the operating environment must be as dry and

dust free as possible.

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The MAC70i operates (depending on country) under 110, 120, 220, 230 or 240V AC

50/60Hz. See characteristics in the back of the unit. You should avoid mixing the mains wire with and

in between shielded signal cables, because this could generate noise and hum.

In order to protect the mixer from eventual mains overloads or occasional excesses in the

consumption of the internal circuits, it has a 250mA (44) mains protection fuse. Should this fuse ever

blow off, disconnect the mixer from mains and replace it for an identical one. If the new fuse also

blows ask our Authorised Technical Service. NEVER REPLACE THE FUSE WITH ANOTHER ONE

WITH A HIGHER VALUE.

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

3.2. Connectable Signal Sources

- Turntables / Phono: They must be fitted with a magnetic cartridge capable of a nominal

output between -60 and -20dBV (1 and 100mV). The PHONO (36) inputs of the MAC70i have a high

headroom (margin before saturation) and it can handle higher output cartridges than what is usual. If

you plan to use moving coil cartridges, they must be of high output level type, you should use a

transformer or external preamplifier, which must be placed as near as possible to the turntables.

These inputs have a nominal sensitivity of -40dBV (10mV).

- Microphones: The MIC inputs (37) are ready for a nominal input level of

-50dBV (3.16mV). They are of the XLR 3 type. These inputs provide, through the input selector (1) at

ATT position, an input sensitivity reduction of 20dB; this is, from -50 to -30dBV (3.16 to 31.6mV).

The MIC inputs allow for balanced connections. You should use the following connections

for the XLR:

Hot or direct signal > Terminal 2

Cold or inverted signal > Terminal 3

Ground > Terminal 1

The microphones must be low impedance (200 to 600) monophonic. For non balanced

connections, short circuit terminal 3 to ground.

- Compact disc, magnetophone, cassettes and videos: These signals can be connected to

any CD (39) or LINE (38) input. Al these inputs carry level type signals between -30 and +20dB

(31.6mV and 10V).

However, given the important level differences between usual LINE and CD sources, the

MAC70i provides specialized inputs for each source. The CD input sensitivity is 0dBV(1V) while the

LINE input sensitivity is -10dBV (316mV). In both cases, it is possible to internally adjust them (see

4.7).

-Tuners and auxiliary equipment: Any auxiliary equipment capable of supplying a signal

between 316mV and 1V must be connected to the above mentioned LINE inputs.

The AUX IN (35) input can be used like any other line level input. The send to bus is

assignable through internal jumpers (see diagram 7.2). The mixer is factory preadjusted with the

AUX input adjusted to the PGM bus.

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- Headphones: In order to achieve the best performance, they must be of high impedance

type (200 - 600). They must be connected to the HEADPHONES OUT (22) connector, a standard

1/4" stereo jack. Connect ground to sleeve, ring to right and tip to left.

- Other mixers: The MIX (40) input provides a direct access to the main mix bus, so this is

a perfect input for another mixer to be plugged in without using up a regular input.

- Power amplifiers: See 4.5.

4. OPERATION AND USAGE

4.1. Start up

Power up the mixer by pushing the POWER (11) switch. The green pilot-light, integrated

into the switch itself, will immediately light up. Although the noise generated by powering up the

MAC70i is reduced to a bare minimum and is nearly null with the MASTER (12 and 21) faders down,

it is always advisable not to forget about this sequence: sound sources, mixer, equalizers, active

filters and power amplifiers. Power down the equipment by following the inverse sequence. This way

the peaks or transients produced by powering up / down a device does not affect the following one in

the audio chain and, as a result, they do not reach the loudspeakers, the weakest audio elements.

4.2. Monitoring

The MAC70i is equipped with an acoustical and visual monitoring system, through

headphones, CUE output and double VU METER. Switching on any of the PFL buttons, the signal(s)

present at the input(s) will be seen at the left VU METER. If no switch is at the on position, the signal

present at the main mix bus is heard (open faders). Switching on the OUT1 / OUT2 buttons, the

signals present at the output 1 or 2 are displayed in the right VU METER. If no switch is on, the

signal present at the main mix bus is displayed (open faders).

It is also possible to monitor through the CUE (41) output. This output carries the very

same signal than the headphones output does. Its nominal output level is -10dB (316mV) and it is

controlled by the rotary knob CUE VOL (20).

4.3. Channel gain and equalization

These controls allow to individually adjust sensitivity levels and tone for every channel.

The GAIN (2) control provides a fine adjust of the input gain in order to make the ready-to-

mix signal's level match the playing channel's level. This operation can be visually performed through

the left VU METER, as well as acoustically with headphones, making successive comparisons

between both signals by means of the PFL buttons. The GAIN controls provide an adjust margin of

±20dB.

The tone controls for each channel allow a ±12dB adjust for the frequencies at 100Hz and

10KHz and ±15dB at 1,8KHz.

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4.4. Use of the CROSSFADER

The MAC70i provides a short travel sliding potentiometer placed horizontally. This

potentiometer is called CROSSFADER (26) and enables a direct mixing of the signals present at

channels 3, 5 and 4, 6. This allows the disc-jockey to prepare the mixes in the turntables and switch /

mix from one to the other by simply moving the CROSSFADER.

Two switchers, at each side of the CROSSFADER (24 and 30) allow for the selection of

the active inputs assigned to each of the CROSSFADER's sides.

The MAC70i's CROSSFADER has the great advantage of being removable and replaced

on-the-field from the outside. In order to replace it, just follow these instructions:

1- Remove the screws of the plate that hold the CROSSFADER.

2- Remove the set from the mixer.

3- Detach the multipin connector.

4- Replace the whole set or remove the screws that tie the potentiometer.

5- Tie the new potentiometer and the associated printed circuit and multipin

connector to the plate.

6- Attach the multipin connector.

7- Place the set on the mixer.

8- Fix the screws of the plate.

4.5. Outputs

The MAC70i mixer has two independent outputs, OUT1 and OUT2. Each one has its own

volume control, with a sliding fader for the main output (21), and a rotary one for the output 2 (12).

Each of the outputs also has its own balance control (17 and 10).

You must be careful when setting up the general output level of the mixer. The “clip”

display of the connected power amplifiers must never remain permanently lighten up, but do it

occasionally by following the rhythm of the bass signals that are being played.

The MAC70i mixing unit is factory adjusted at 0dBV/1V, although this output can be

internally modified to -10dBV/0.316V, +4dBV/1.6V or +6dBV/2V. See 4.7.2.

The OUT1 (32, 42) output is balanced, with the following pin sheme:

Hot or direct signal > Terminal 2

Cold or inverted signal > Terminal 3

Ground > Terminal 1

The balancing circuit simulates a transformer, so if you want to use OUT1 in non balanced

mode you must short circuit to ground the pin from the non-used output, else the output signal will

not have the desired level nor quality.

OUT2 (43) output is NON-BALANCED OR ASYMMETRICAL.

The MAC70i has two recording outputs: REC1 before the talkover (no channel signal is

present so it does not activate the talkover and so it does not attenuate the output) and REC 2 which

is affected by the talkover.

Finally, a L+R (19) switcher converts the stereo signal into mono or makes it present to

only one of the two channels. This switcher affects the OUT1, OUT 2 and REC 2 signals.

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4.6. Talkover

This device automatically reduces the signal level just at the first voice "hit" of the DJ or

speaker on the microphone plugged to the channel which is assigned to the Talkover. When the DJ

stops talking the music level come up to the initial level. The talkover is enabled through the ON (25)

switch, and has efficiency, EFF (28), main signal level attenuation (between 0 and 30dB) and

recovery time, REC TIME (27), the necessary time for a progressive come back to the original level

(between 0,5 and 2 sec).

The channel(s) assignable to Talkover are internally selectable, see 7.1. The MAC 70i is

factory preset at channel 1.

ATTENTION: The modification of the talkover assignment must be carried out by a qualified

technician.

4.7. Internal adjustments

4.7.1. Input sensitivity adjustments

The MAC70i has the possibility of internal modification of the CD and LINE channels input

sensitivity, as mentioned in section 3.2. The sensitivity adjustment is performed by changing the

position of the jumpers on the printed circuit board.

The next table shows the preset sensitivities, the alternate ones, the jumper positions and

comments about it:

Preset Alternate Change Comment

CD 0 dB -10 dB jumper off more sensitive

LINE -10 dB 0 dB jumper on less sensitive

ATTENTION: The modification of the input gain range must be carried out by a qualified

technician.

INPUT SENSITIVITY

LINE-CD-AUX

J103 J104

-10dBV OFF OFF

0dBV ON ON

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4.7.2. Output sensitivity adjustments

Same as with the input sensitivities, the output levels are also internally and independently

adjustable. The following table shows the jummper arrangements for the desired levels:

ATTENTION: The modification of the output gain must be carried out by a qualified

technician.

5. CONSIDERATIONS

5.1. Ground loops

You should always try that all sources which reach the mixer, as well as all devices

connected to its output, do not have their grounds interconnected between them, that is, that they

never get the ground signal through two or more different ways. Sould this ever happen, hum and

noise could appear and interfere the sound quality.

The cable shielding, when connected to the chassis, must never be interconnected

between them. This way ground loops will be avoided.

5.2. Audio connections

As a general rule of thumb, make the signal connections as short as possible and use the

best connectors and cable available. Cables and connectors are frequently undervaluated, forgetting

that a bad connection can result in a poor sound quality.

5.3. Background noise

The use of active circuitry can yield, depending on the configuration, to a significant noise

level. The MAC70i mixer has been designed for the minimum possible noise. Anyway, the noise

level will always depend on the correct use and installation of the mixer.

It is not the same setting up the “FADER” at “2” and the “MASTER” at “10” that the other

way round; “FADER” at “10” and “MASTER” at “2”. In the first case you get a poor signal-to-noise

ratio that will be fully amplified by the master while on the second we have a good signal-to-noise

ratio only amplified by 2. As a result, the background noise is greater in the first case than in the

second one.

CHANNEL R

OUTPUT 1

CHANNEL L

OUTPUT 1

CHANNEL R

OUTPUT 2

CHANNEL L

OUTPUT 2

J102 J103 J104 J105 J106 J107 J108 J109

-10dBV OFF OFF OFF OFF OFF OFF OFF OFF

0dBV ON OFF ON OFF ON OFF ON OFF

+4dBV OFF ON OFF ON OFF ON OFF ON

+6dBV ON ON ON ON ON ON ON ON

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5.4. Cleaning

The control panel must not be cleaned with any dissolvent, abrasive or petroleum

derivated substance else paint and silk-printing could be damaged.

Whenever cleaning should be necessary use a soft cloth slightly wet with water and

neutral liquid soap or with a solution of water and alcohol at 50%. Be careful that no liquid gets into

the mixer. Never use sharp or erosive objects to scratch the control panel.

Should any liquid get into the mixer, do not use any cleaning sprays; send the unit to the

nearest ECLER Technical Service.

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6. MAC70i TECHNICAL CHARACTERISTICS

Input Sensitivity nom(*)/Impedance PHONO -40dBV/47k

LINE -10(0)dBV*/47k

CD 0(-10)dBV*/47k

AUX -10(0)dBV*/47k

MIC (BAL) -50dBV/2.2k

MIC ATT (BAL) -30dBV/2.2k

MIX -10dBV/9.3k

Outputs Level/Minimum load OUT1 (BAL) 0(-10/+4/+6)dBV*/600

1(0.3/1.6/2)V

OUT2 0(-10/+4/+6)dBV*/2.2k

1(0.3/1.6/2)V

REC1 -10dBV/10k

REC2 -10dBV/10k

CUE -10dBV/10k

HEADPHONES 230mW/400

(*) internally switchable

input sensitivity adjust GAIN ±20dB

Frequency response PHONO RIAA±0.5dB

LINE/CD/MIX 15Hz-45kHz+0/-1dB

MICRO 20Hz-25kHz+0/-1dB

Harmonic distortion PHONO <0.03%

LINE/CD/MIX <0.02%

MICRO <0.2%

CMRR MICRO >70dB@1 kHz

Signal to noise ratio PHONO >80dB

LINE/CD >85dB

MICRO >75dB

MIX >85dB

Tone control BASS 100Hz ±12dB

MID 1.8kHz±15dB

TREBLE 10kHz ±12dB

Mains Depending on country See characteristics plate in the unit

Power consumption 24VA

Dimensions Panel 482.6 x 310.5mm Height 109mm

Weight 5.5kg

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7.3. Function list 7.3. Lista de funciones

1. Input selector 1. Selector de entradas

2. Input sensitivity adjust, GAIN 2. Ajuste de la sensibilidad de entrada, GAIN

3. Treble control, TREBLE 3. Control de agudos, TREBLE

4. Midrange control, MID 4. Control de medios, MID

5. Bass control, BASS 5. Control de graves, BASS

6. Prefader listening control, PFL 6. Conmutador de preescucha, PFL

7. Channel gain, FADER 7. Ganancia de vía, FADER

8. LED VU Meter, MIX/PFL 8. Vu-meter a leds, MIX/PFL

9.LED VU Meter, MIX/OUT 9. Vu-meter a leds, MIX/OUT

10. Balance control OUTPUT 2, BAL 10. Control de balance OUTPUT 2, BAL

11. Switcher and start up pilot, POWER 11. Interruptor y piloto de puesta en marcha, POWER

12. Volume control OUTPUT 2, VOL 12. Control de volumen OUTPUT 2, VOL

13. LED indicator, MIX 13. Indicador luminoso, MIX

14. LED indicator, MIX 14. Indicador luminoso, MIX

15. LED indicator, PFL 15. Indicador luminoso, PFL

16. Listening switch, OUT2 16. Conmutador escucha, OUT2

17. Balance control OUTPUT 1, BAL 17. Control de balance OUTPUT 1, BAL

18. Listening switch, OUT1 18. Conmutador escucha, OUT1

19. Mono/Stereo switch, L+R 19. Conmutador de mono-estéreo, L+R

20. Cue volume control, CUE 20. Control volumen cue, CUE

21. Volume control OUTPUT 1, VOL 21. Control de volumen OUTPUT 1, VOL

22. Stereo jack, headphone connection, OUT 22. Jack estéreo conexión auriculares, OUT

23. Headphones volume control, VOL 23. Control volumen auriculares, VOL

24. Crossfader assign switch, channels 4/6 24. Conmutador de asignación al Crossfader vias 4 y 6

25. Talkover, ON 25. Puesta en marcha Talkover, ON

26. CROSSFADER control 26. Control de CROSSFADER

27. Talkover Recovery time control, REC TIME 27. Control tiempo de recuperación talkover, REC TIME

28. Talkover effect control, EFF 28. Control de efecto talkover, EFF

29. Aux volume control, VOL 29. Control de volumen aux, VOL

30. Crossfader assign switch, channels 3/5 30. Conmutador de asignación al Crossfader vias 3 y 5

31. Ground pin, GND 31. Borne de toma de masa, GND

32. Main balanced XLR output, LEFT 32. Salida principal balanceada XLR canal izquierdo, LEFT

33. Post effects recording output, REC2 33. Salida de grabación post-efectos, REC2

34. Pre effects recording output REC1 34. Salida de grabación pre-efectos, REC1

35. Auxiliar input, AUX IN 35. Entrada auxiliar, AUX IN

36. Phono input, PH 36. Entrada de phono, PH

37. Microphone balanced input, MICRO 37. Entrada balanceada de micrófono, MICRO

38. Line input, LINE 38. Entrada de linea, LINE

39. Compact Disc input, CD 39. Entrada de compac disc, CD

40. Mix input, MIX 40. Entrada mezcla, MIX

41. Cue output, CUE 41. Salida cue, CUE

42. Main balanced XLR output, RIGHT 42. Salida principal balanceada XLR canal derecho, RIGHT

43. RCA output, OUT2 43. Salida RCA, OUT2

44. Fuse holder 44. Portafusibles

45. Mains socket 45. Base de toma de red

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ECLER Laboratorio de electro-acústica S.A.

Motors 166-168, 08038 Barcelona, Spain

INTERNET http://www.ecler.es E-mail: [email protected]

50.0023.0200

Ecler MAC70i User manual

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