Ecler PKUB User Manual
USER MANUAL
MANUAL DE INSTRUCCIONES
NOTICE D'UTILISATION
BEDIENUNGSANLEITUNG
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INSTRUCTION MANUAL
1. IMPORTANT REMARK 04
1.1. Safety Precautions 04
2. INTRODUCTION 04
3. INSTALLATION 06
4. INPUTS 06
5. OUTPUTS 07
6. INFRARED REMOTE CONTROL 08
7. CONSIDERATIONS 08
7.1. Starting up 08
7.2. Gain and input levels 08
7.3. Equalization 08
7.4. SIGNAL indicators 08
7.5. CLIP indicators 09
7.6. VOLUME control knob 09
7.7. Auto-Standby function 09
7.8. MUTE - REMOTE LED indicator 10
7.9. Ground loops, background noise 10
7.10. Cleaning 10
8. FUNCTION LIST 11
9. FUNCTION DIAGRAM 11
10. CONFIGURATION DIAGRAM 39
11. TECHNICAL CHARACTERISTICS 40
12. BLOCK DIAGRAM 41
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
Thank you for trusting us and choosing our PKUB amplified mixer. In order to obtain the
best performance and efficiency it's VERY IMPORTANT to carefully read and follow all
considerations specified in this manual before connecting the product.
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 PKUB is a professional two channel amplified mixer in a tabletop format, incorporating a
powerful Class-D stereo amplifier and a universal power supply.
The PKUB is a professional and compact solution for sound equipments of which end user
is not necessarily expert in audio equipment usage, since it offers simple power up and operation, like
those of domestic audio equipment. Also, its absolutely quiet operation as well as its particular format
and design make it perfect for use in obvious places, where classic professional equipment with a rack
format would not be suitable.
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These are its main features:
• Two-channel input mixer, with one MIC/LINE input and one LINE only input
• Class-D stereo integrated amplifier, 2 x 50W RMS @ 4 Ω
• Direct AUX IN (Channel 2) line input via a front panel mini-jack, ideal to connect iPod® type
players, mp3 players, multimedia players, etc. The same stereo connection is duplicated on
back panel for Channel 2 (RCA connectors)
• A Type A USB connector supplies power to charge batteries of iPod® type players, mp3
players, multimedia players, etc.
• Includes a Talkover function assigned to Input 1, with an internal recovery time selector
(see configuration diagram)
• Microphone sensitivity level can be adjusted with a back panel trimmer
• Internally switchable phantom power supply (+15V DC) for MIC (Channel 1)
• Level control for each input channel
• 3-Band tone controls on the back panel, independent for each input channel and adjustable
with a screwdriver
• Main output level rotary knob also working as a MUTE push button
• Output volume and mute remote control by means of the supplied infrared remote handset
• Line-level auxiliary output for a reinforcement subwoofer or another audio equipment
• Direct MIX IN input to the mixing "bus", allowing to connect external equipment, e.g.
another PKUB or a SAM type mixer
• General "MUTE" remote control by external contact closure, ideal for connection of fire
detection systems or any other safety device. Internally selectable as "NO / NC" (normally
open / normally closed).
• Back panel MONO/STEREO mode selector
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3. INSTALLATION
The PKUB is a professional mixer specially designed to be operated by non-technical users
and for tabletop usage. For this reason, its adjustments for microphone input sensitivity and tone
controls on each input are located on the back panel, and tone controls are adjustable with a
screwdriver only, therefore preventing the risk of unwanted operations.
Keep the unit far from noise sources (variable voltage regulators, motors, etc…) as well as
from power cables.
Also, you must not block ventilation opening with obstacles that could interfere with the
airflow of the equipment convection cooling.
The PKUB operates under voltages from 90 to 264 V at 47 to 63 Hz. This device features
an over dimensioned power supply that adapts to the mains voltage in any country of the world with
no need to make any adjustments.
In order to protect the unit from eventual overloads, the PKUB is protected by a timered
power fuse (25) of 4A. 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
The PKUB INPUT 1 accepts two types of signal: MIC and stereo LINE. You can select one of
them with the back panel switch (14). On the back panel, a sensitivity knob and a MIC jack connector
handle microphone signals (level range: – 20 dBV to – 50 dBV) whereas stereo line signals are
connected to LINE RCA connectors, also located on the back panel.
INPUT 2 only accepts stereo line signals and has a front mini-jack connector and another
RCA type connector on the back panel.
MIC input allows balanced connection. In this case, the stereo 1/4" jack wiring has to be done
as indicated:
Live or direct signal > Tip
Cold or inverted signal > Ring
Ground/Earth > Sleeve
Microphones must be low impedance (200 to 600Ω) and monophonic. For NON balanced
connections, use monophonic jacks. It is also possible to make a non balanced connection with a
stereo jack connector by shorcircuiting the center ring to ground.
It supplies phantom power in order to use condenser microphones (positive on the tip and the
ring, negative on the sleeve). An internal jumper is used to switch it on/off. See configuration diagram
for more details.
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The AUX IN (INPUT 2) line input on a front panel mini-jack connector (6) is summed in
parallel with the same channel from the back panel. It has the following wiring:
L channel > Tip
R channel > Ring
Ground > Sleeve
Stereo LINE inputs accept -10 dBV (0.31 V) line level signals from CD and DVD players,
multimedia devices, iPod®, MP3 players, radio tuners, TV receivers, etc. Turntables CAN NOT be
directly connected to this unit, because the PKUB has no RIAA preamp equipped input.
The line MIX INPUT is a direct access to the main mixing "bus". This input with 0dB (1V)
sensitivity is especially useful to interconnect e.g. two PKUB units or a PKUB and a SAM type mixer,
etc., therefore increasing the number of mixing channels and inputs.
5. OUTPUTS
The PKUB has a low impedance main amplified stereo output labelled OUT (20, 21) to
connect loudspeakers: 2 x 50 W RMS @ 4 Ω.
Use special care when setting the mixer general output level, VOLUME (5), so that CLIP
indicators never remain permanently lit in the upper part of the VU-meters bargraphs (9), but only (and
at the most) at the rhythm of the sound sequence lowest frequencies.
The PKUB has a non amplified stereo auxiliary output labeled SUB/AUX OUT (18) with RCA
connectors. Its output level is proportional to the equipment's general volume setting. Next to this
output, a MONO/ST selector allows to choose for this signal and the amplified outputs a monophonic
format (sum of L and R channels).
The PKUB allows to bridge outputs. In order to do this, simply press the back panel MONO
switch and connect the output as silk printed.
The PKUB incorporates a MUTE (22) remote control that can be activated by an external
potential free contact, affecting all inputs. This control is especially designed to connect fire
detection systems or any other safety device. It is internally selectable as "NO / NC" (normally open
/ normally closed) by means of a jumper. See configuration diagram for more details.
The MUTE front panel red LED indicator lights up whenever the unit is muted by the MUTE
external contact or by the user operating the MUTE control on the front panel or on the remote handset.
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6. INFRARED REMOTE CONTROL
The equipment includes as standard a remote control and its infrared detector to control
general volume and mute. Three keys control these functions:
• VOL UP (upward arrow)
• VOL DOWN (downward arrow)
• MUTE (crossed out speaker symbol)
Always try to point the remote handset directly toward the PKUB front panel REMOTE
detector, within range and preferably in front of it, without obstacles between them. The maximum
response distance for the emitting/receiving system depends on the incidence angle of infrared signals
on the receiver, on the battery load in the remote handset and on the existence of ambient interfering
signals, such as other infrared signals or emissions coming from certain types of fluorescent lamps.
7. CONSIDERATIONS
7.1. Starting up
This is directly done by means of the mains switch (24), the blue ON indicator (8) remaining
lit in blue on the front panel when the unit is powered on.
In a complete audio installation, it is important to start up the equipment in the following
sequence: sound sources, mixer, equalizers, active filters and finally power amplifiers. To turn them
off the sequence should follow an inverse pattern.
7.2. Gain and input levels
The PKUB has an effective adjustment system for the microphone input (channel 1)
sensitivity, allowing a precise matching to input levels. This system uses a back panel trimmer (15) for
this setting.
Also, two front panel rotary knobs (INPUT 1 and INPUT 2) allow to adjust the level of signals
sent from Input 1 and 2 to the mixing bus of the equipment for a later amplification that will be
proportional to the front panel VOLUME control setting.
7.3. Equalization
Tone controls (10, 11, 12) provide ±15 dB gain/attenuation for each of the three bands,
centered on 100Hz, 1.8kHz and 10kHz. Because of the intended applications of this unit, its tone
control system is adjustable by screwdriver, thus preventing unauthorised or unintentional use during its
normal operation.
7.4. SIGNAL indicators
The “SIGNAL” indicator (2) lights up to indicate a signal presence at inputs.
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7.5. CLIP indicators
“CLlP” indicators light up when the signal is near the real clipping (saturation) level. It is
normal for CLIP indicators to be lit at the bass frequencies rhythm for high operating levels, as these
frequencies have the higher energy content. You must take care that these indicators do not remain
continuously lit.
7.6. VOLUME control knob
The front panel VOLUME control knob has three functions:
• Adjusting the unit output volume, when you turn it
• Activating the unit's mute function, when you press it
• Deactivating the unit's mute function, when you press it again or turn it
The MUTE LED indicator lights up in red when the unit is muted.
Last volume setting is stored and at power-on the unit will be set to the same volume level as
when it was last turned off.
NOTE: if the unit is muted by the back panel MUTE external contact closure or opening,
all front panel and remote handset controls are deactivated. If MUTE is externally activated while the
device is already muted, the device remains muted after the end of the external activation.
7.7. Auto-Standby function
The unit automatically enters standby mode (low power consumption) after two minutes of
no input signal. In standby mode, the front panel ON LED indicator has a variable light intensity that
increases and decreases according to a slow cycle. In this mode, the other LED indicators are
permanently switched off.
The PKUB wakes up again in following conditions:
• An audio signal is detected on any input
• Any key of the remote control is pressed. Its assigned command is NOT executed
that time
• The volume is changed (UP/DOWN) or the front panel VOLUME control is pressed.
The assigned command is NOT executed that time
• A status change has been detected at the external MUTE input. The assigned
command IS executed
• Auto Standby can be deactivated with the back panel switch
If the unit was muted before entering the standby mode, the MUTE LED indicator is
switched off in standby mode and lights up when the unit is switched ON again.
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7.8. MUTE - REMOTE LED indicator
The MUTE LED indicator on the front panel also indicates when signals sent with the remote
handset are received by the infrared detector: it lights up in green when infrared signals are received
and in orange when you try to increase or decrease the volume beyond its maximum/minimum limits,
with the remote control or the encoder.
7.9. Ground loops, background noise
You must always avoid interconnected grounds between signal sources. It means grounds
must never arrive by two or more different ways, since this could produce "hum" ("ground loop") that
would even interfere with the sound reproduction quality.
Cable shielding, when connected to the chassis, must never be interconnected, so as to
avoid ground loops.
The PKUB amplified mixer has been conceived to obtain the lowest possible background
noise. Independently of the electronic design the background noise will directly depend 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.
7.10. 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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8. FUNCTION LIST 9. FUNCTION DIAGRAM
1. Channel volume control
2. Visual indication, SIGNAL
3. Visual indication, MUTE
4. Remote control detector, REMOTE
5. Volume control, VOLUME
6. Line input, AUX IN
7. USB power supply, CHARGE
8. Visual indication, ON
9. VU Meter
10. Treble control, TREBLE
11. Mid control, MID
12. Bass control, BASS
13. Line input, LINE
14. Input selector, MICRO LINE
15. Input sensitivity adjustment, ADJ
16. Balanced microphone input, MICRO
17. Standby mode selector, AUTO STBY
18. Auxiliary output, SUB / AUX OUT
19. Mono-stereo switch, ST / MONO
20. Screwable terminal, OUT L
21. Screwable terminal, OUT R
22. Screwable terminal for remote mute, MUTE
23. Mix input, MIX INPUT
24. Mains OFF/ON Switch, O/I
25. Fuse holder
26. Mains socket
27. Unit mute switch
28. Volume up key
29. Volume down key
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MANUAL DE INSTRUCCIONES
1. NOTA IMPORTANTE 13
1.1. Precauciones 13
2. INTRODUCCIÓN 13
3. INSTALACIÓN 15
4. ENTRADAS 15
5. SALIDAS 16
6. CONTROL REMOTO POR INFRARROJOS 17
7. CONSIDERACIONES 17
7.1. Puesta en funcionamiento 17
7.2. Ganancia y niveles de entrada 17
7.3. Ecualización 17
7.4. Indicadores SIGNAL 17
7.5. Indicadores CLIP 18
7.6. Control giratorio VOLUME 18
7.7. Función Auto-Standby 18
7.8. Indicador LED MUTE-REMOTE 19
7.9. Bucles de masa, ruido de fondo 19
7.10. Limpieza 19
8. LISTA DE FUNCIONES 20
9. DIAGRAMA DE FUNCIONES 20
10. DIAGRAMA DE CONFIGURACIÓN 39
11. CARACTERÍSTICAS TÉCNICAS 40
12. DIAGRAMA DE BLOQUES 41
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 amplificado PKUB. Para
conseguir su máxima operatividad y rendimiento 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
PKUB es un mezclador amplificado profesional de dos canales en formato de sobremesa, y
que integra un potente amplificador estéreo de clase D y fuente de alimentación universal.
PKUB es una solución compacta profesional para sonorizaciones en las que el usuario final
no sea necesariamente experto en el uso de equipamiento de audio, ya que ofrece una sencilla puesta
en marcha y utilización, similares a las de los equipos de audio domésticos. Asimismo, su
funcionamiento absolutamente silencioso, así como su particular formato y estética, lo hacen perfecto
para su empleo en ubicaciones “a la vista”, en las que el equipamiento profesional clásico, con formato
para instalación en armario de rack, no sería apto.
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Estas son sus características principales:
• Mezclador de dos canales de entrada, uno compatible con señales de MICRO / LÍNEA y el
otro sólo de LÍNEA
• Amplificador estéreo integrado clase D de 2 x 50 W RMS sobre 4 Ω
• Entrada directa de línea tipo minijack en panel frontal, AUX IN (canal 2), ideal para la
conexión de reproductores tipo iPod®, mp3, multimedia, etc. El canal 2 dispone asimismo de
conexión estéreo RCA duplicada en panel posterior
• Toma de alimentación con conector USB tipo A, para la carga de baterías de reproductores
tipo iPod®, mp3, multimedia, etc.
• Incluye función Talkover asignada a la entrada 1, con selector interno del tiempo de
recuperación (ver diagrama de configuración)
• Nivel de sensibilidad de micrófono ajustable mediante trimmer en panel posterior
• Alimentación Phantom (+ 15 V DC), conmutable internamente, para MICRO (canal 1)
• Control de nivel por canal de entrada
• Controles de tono de tres bandas en panel posterior, independientes por canal de entrada y
accesibles mediante destornillador
• Control rotativo de nivel general de salida con función MUTE mediante pulsación
• Control remoto de volumen de salida y enmudecimiento mediante mando de infrarrojos
incluido
• Salida auxiliar de línea para el empleo de un refuerzo de subgraves o envío a otros equipos
de audio
• Entrada MIX IN directa al "bus" de mezcla, para enlazar la unidad con equipos externos,
como por ejemplo otra unidad PKUB o un mezclador tipo SAM
• Control remoto de "MUTE" general mediante cierre de contacto externo, ideal para la
conexión de sistemas de detección de fuego u otros dispositivos de seguridad.
Configurable internamente "NO / NC" (normalmente abierto, normalmente cerrado).
• Selector MONO / STEREO en panel posterior
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