Master audio B Series B5A User manual

B SERIES
B5A
Pol.Ind.Norte-Perpinyà,25
08226 TERRASSA
(Barcelona-SPAIN)
[email protected]
www.master-audio.com
Copyright © 2014
All rights reserved
2014
User’s manual / Manual usuario

ENGLISH. Safety instructions
1. All safety instructions must be read before using this device.
2. The exclamation mark in the triangle indicates
internal components which if replaced can affect
safety.
3. The lightning symbol within the triangle
indicates the presence of dangerous uninsulated
voltages.
4. This device must not be exposed to rain or humidity.
5. Only clean the device with a dry cloth.
6. Do not install the device near heat sources such as radiators,
heaters or other heat-emitting elements.
7. The equipment must be repaired by qualified technical service
personnel when:
A. The mains supply cable is damaged, or
B. Any object or liquid has damaged the device; or
C. The equipment does not function normally or correctly; or
D. The equipment has been exposed to the rain; or
E. The chassis is damaged
8. Disconnect the device in the case of electric storms or during
long periods of disuse.
9. Use only manufacturer recommended accessories.
To reduce the risk of fire or electric shock do
not expose this equipment to rain or moisture
WARNING:

1. INTRODUCTION
1.1. General
Master Audio would like to thank you for your confidence in our B
Series. We suggest you to carefully read the following instructions in
order to obtain the best results in performance.
1.2. Features and presentation
Your new Master Audio B5A is a powered two-way speaker system
designed for indoor using. Thanks to its accurate design, the B5A is
ideal for multiple solutions, such as conference rooms, home studio,
classrooms or presentation venues.
The main speaker system features are:
•Self-powered stereo acoustic system (one unit active and
one unit passive)
•Three available inputs:
a) Balanced stereo on a 5-pin block connector
b) Unbalanced stereo L & R on RCA connectors
c) Line level stereo input on a 3,5mm mini jack connector
•Three available outputs:
a) Output to the right passive speaker (4 ohm)
b) Output to an external active subwoofer
c) A link output, for chaining additional pairs of active
speakers
•BASS, TREBLE, VOLUME control knobs
•Bass-reflex design for optimum bass performance
•In-built 30W+30W stereo amplifier
•Universal mains range of 90 to 240V AC
•Auto-power shutoff (STBY mode)
•ABS cabinet
•5.25” polypropylene cone with butyl rubber surround woofer
•1” titanium dome tweeter

•1
rst order LPF & 3rd-order HPF built-in a two-way crossover
•Rubber feet for desktop use
•2x M5 insert nuts for optional SP-5A bracket
2. CONTROL AND CONNECTION PANNEL (Active cabinet)
A: SPEAKER OUTPUT connector: Output signal to feed the right
passive speaker (4 ohm)
B: 5-pin terminal block stereo INPUT connector: Connect the audio
source to this connector (balanced, sensitivity 1.5V)
C: L&R RCA stereo INPUT connector: Connect the audio source to
this connector (unbalanced, sensitivity 1V)
D: 3.5mm stereo Mini Jack INPUT connector: Connect the audio
source to this connector (unbalanced, sensitivity 0.775V)
E: 3.5mm Mini Jack SUB OUT connector: When desired, connect an
active subwoofer to this output for increasing bass reproduction
F: 3.5mm Mini Jack LINK OUT connector: If necessary, connect to
another pair of active speakers
G: POWER/STANDBY LED1: Illuminates in green when powered
(power switch set to ON or STBY). Illuminates in red when in the
standby mode (power switch is set to STBY)
H: VOLUME: Rotate the button to adjust the audio volume
I: TREBLE: Rotate the button to control de treble
J: BASS: Rotate the button to control de bass
K: POWER switch: For tuning the unit ON, OFF, STBY shutoff 2
L: AC-Input power supply: Connect to the AC power cord. For your
safety, use always a power outlet with ground terminal
1 In the STBY mode, the LED illuminates green if an input signal is detected
and illuminates red if idle for over 2 minutes
2When selecting the STBY shutoff mode, the speaker enters the standby
mode when idle for over 2 minutes (only 0,7W consumption)

Fig.1. B5A control and connection panel (active cabinet)
B
D
EF
G
A
C
HI J
K L

3. CONNECTION PANEL (Passive cabinet)
A: 2-pin terminal block stereo INPUT connector: Connect the passive
speaker from the active speaker. IMPORTANT: Respect always the
polarity of the speakers to avoid out of phase audio performance.
Fig.2. B5A connection panel (passive cabinet)
4. MOUNTING AND PLACEMENT
For a proper installation of the speaker system, it is strongly
recommended to carefully read the following advices.
•Connect only good quality cables, thus avoiding interference,
deterioration in signal quality due to poor matching, and elevated
noise-levels
•Avoid interference from neighbouring electrical appliances
•Position your B5A cabinets away from moisture, excessive
sunlight and dust
•Choose the best location for your speakers. Experiment by placing
them in different locations before finally deciding the most suitable
location
A

•When using the optional mounting bracket, be sure that the
wall type is appropriate, that is, either solid wood, bricks or
concrete
•Check that the mounting location is free of obstructions,
such as AC ducts or water lines, electrical piping, and so on
5. CONNECTION
To install the speakers, do the following:
•Connect the “+” and “-“ sockets of the active speaker to the
“+” and “-“ sockets of the passive speaker using the cable
supplied
•Connect the input source (mixer, CD or DVD player,
computer, smartphone and so on)
•Connect the AC power to a grounded inlet socket
•Adjust the volume on the input source
•Adjust the volume control on the rear side control panel
•Adjust the treble and bass control on the rear side control
panel
•If required, connect and additional set of speakers by
connecting the LINK OUTPUT connector to the input of a
second active speaker
•If required, mount the speaker on the wall via the optional
mounting bracket (see “SP-5A” user’s manual).
6. TREBLE AND BASS CONTROL
Use the BASS and TREBLE knobs to control both the low
frequency and the high frequency response of the speakers.
•BASS CONTROL
MAX: Low-Shelf +4dB
MIN: Low-Shelf -8dB
•TREBLE CONTROL
MAX: Hi-Shelf +4dB
MIN: Hi-Shelf -12dB

Fig.3. Bass control
Fig.4. Treble control
+
-
Fig.5. Connection from active speaker to passive speaker

7. TECHNICAL FEATURES
Audio Inputs 1 line stereo on a 3.5mm mini Jack connecto
r
(0.775V, unbalanced)
1 line stereo on a terminal block connecto
r
(1.5V, balanced)
1 line stereo on left & right RCA connectors
(1V, unbalanced)
Audio Outputs 1 passive speaker on a terminal block
connecto
r
1 active subwoofer on a 3.5mm mini connecto
r
1 link output on a 3.5mm mini connector
Speaker type Two-way bass reflex
Woofer 5,25” polypropylene cone with butyl rubber
surround
Tweeter 1” titanium diaphragm
Impedance 4 Ω
Sensitivity 88 dB (1W/1m)
105 dB (maximum continuous)
Frequency
response 58Hz – 20kHz (-10dB)
Built-in amplifier 2x30W r.m.s
Power supply Universal mains 90-240V AC 50/60Hz
Standby mode
power
consumption
0.7W
Materials ABS cabinet
Steel grille
Dimensions 248x170x176 mm (HxWxD)
Dimensions with
mounting bracket 248x170x290 mm (HxWxD)
Accessories
(included) Feet, 4-m loudspeaker cable,
2-m RCA-mini Jack cable, 2-m power cord
Not included SP-5A aluminium wall bracket
Weight Active speaker: 2,9Kg/Passive speaker: 2,5Kg
Weight with SP-5A Active speaker: 3,2 Kg / Passive speaker: 2,8 Kg

8. WARRANTY
All MASTER AUDIO products manufactured by Amate Electroacústica, s.l.
have been conceived under strict manufacturing rules and have passed
rigorous quality controls to guarantee an excellent and long product
performance even under the hardest conditions.
Amate Electroacústica, s.l. extends its Warranty Certificates for each
group of products according to their technological characteristics in order
to cover manufacturing defects of the product or any of its components,
including necessary workmanship for its replacement.
The validity period depends of each group of products, and it is
determined in the following manner:
Electronics: Power amplifiers (*), equalizers (**), mixers (**), limiters (**).
For this group of products, the warranty is extended to THREE years for
all related to circuits and electronic components (in solid state).
Exceptions:
(*): Each series of amplifiers has its own warranty period due to its
technological configuration, which is defined in the Instructions Manual or
in the commercial catalogue.
(**): The mechanic parts and components submitted to wear out from the
own use, such as slide potentiometers, commuters, switches, and
connectors, will only have ONE year warranty, provided that the wear out
is not caused by inappropriate use or by presence of solid or liquid foreign
object.
Acoustics: Passive acoustic cabinets. The warranty for this group of
products is for ONE year for all its components (transducers, passive

crossovers, and connectors); provided that the cause of the damage is
due to a manufacturing defect or malfunctioning of any of its components
(***)
(***) The warranty WILL NOT be effective in any case when:
a) Any of the mentioned components present unquestionable traces of
destruction by overheating or excess of continuous temperature
(burned voice coils or diaphragms), as well as magnetic nucleus
displaced by a hit.
b) The parts handled by the user, such as connectors or painted
wooden cabinet, also present signs of violence, hits, exposure to
continuous and excessive humidity, or mistreat in general.
Electroacoustics: Active acoustic cabinets, that is, self-powered
systems (****). In this section of products, the warranty has also two
parts:
c) Electronics, that includes in most of the cases the amplification in
class AB and D, with its corresponding power sources (linear or
commuted) and the rest of the control or processing circuits. In this
case, a TWO-year warranty is granted.
d) And the acoustic components (electromagnetic transducers –
speakers), with ONE-year warranty. In this case, the warranty does
NOT cover the damages caused by the same causes described in
clause (***).
(****) As a general rule for all products, the WARRANTY DOES NOT
COVER the damages caused by improper use (failure to comply the
operations described in the User’s Manual, wrong connections, etc.),

mistreat during use or accidentally, the internal handling by other than an
Authorized Technical Service without the previous authorisation of our
own Technical Service .
In case of damaged or defective product:
Please contact your local dealer or check our website www.master-
audio.com to find the distributor in your country.
As the transport of the material to the Technical Service office is to the
charge of the client, we recommend that you take the necessary
measures to protect the product to avoid any possibility of damage or
wear out during transport. For devolution of a defective new product, it
should be sent back in its original packaging with all its accessories and
internal protection elements. Amate Electroacústica,s.l. reserves the right
of not admitting any devolution or damaged material sent back if the
packaging is in bad conditions.
Once received the material, the Authorized Technical Service will make
an evaluation of the damages and determine the cost of repair or proceed
to apply the warranty or replacement of the product if proceeds.
Warranty Rights:
The product indicated in the purchase invoice is for PROFESSIONAL use,
and it is protected under the law 23/2003 of July 10th about Warranties in
the Sale of Consumer Goods. Notwithstanding, Amate Electroacústica,s.l.
voluntarily grants WARRANTY over possible defects in manufacturing for
the above mentioned period for each Series or group of products.
Conditions: The buyer has been informed about the maintenance
required for the material purchased in order to keep it in perfect conditions
of use and maintenance, as well as to avoid its wear out. The buyer has

also received (corresponding to each case) one Manual with the technical
features of the product purchased and the instructions for its correct use.
The buyer, after checking the purchased material, accepts the reception
of the product without any type of external damage, in good conditions
of use, without prejudice of possible nonconformity that could happen
as a consequence of its use.
Validity periods: The warranty is effective from the date of purchase
of the product, being valid against the presentation of the corresponding
invoice, provided that it shows the original serial numbers of the
manufacturer matching to the serial numbers shown in the identification
labels stuck on every product. Any product that does not have the
corresponding serial number could be excluded of any warranty right by
unilateral decision of our Commercial Department.
Warranty for products repaired by Amate Electroacústica,s.l:
Any product or part replaced by the Technical Service of Amate
Electroacústica, s.l. has a 90-day warranty from the date of the repair
(with the paid invoice), provided that the same failure is produced by the
same reasons and is not related to any misuse or mistreat.
In any case of technical assistance given by Amate Electroacústica,s.l
or any of its Authorized Technical Services, the client cannot demand
any compensation for indirect damages arisen from professional
services to third parties, as well as the loss of benefits or incomes
caused by the product breakdown.

ESPAÑOL. Instrucciones de seguridad
1. Todas las instrucciones de seguridad deben ser leídas antes de
utilizar este aparato.
2. El signo de exclamación dentro de un triángulo
indica componentes internos cuyo reemplazo puede
afectar la seguridad.
3. El símbolo del rayo con la punta de la flecha indica
la presencia de voltajes peligrosos no aislados.
4. Este equipo no debe ser expuesto a la lluvia ni a la humedad.
5. Limpie el aparato sólo con paños secos.
6. No instale el aparato cerca de ninguna fuente de calor, como
radiadores, estufas u otros aparatos que emitan calor.
7. Este equipo debe ser reparado por personal cualificado del servicio
técnico cuando:
A. El cable de red esté dañado, ó
B. Algún objeto o liquido haya dañado el aparato; ó
C. El equipo no funcione de una manera normal (correcta); ó
D. El equipo se haya expuesto a la lluvia; ó
E. El chasis esté dañado
8. Desconecte el aparato en caso de tormentas eléctricas o cuando
no vaya a emplearlo durante largos períodos de tiempo.
9. Use solo accesorios recomendados por el fabricante.
To reduce the risk of fire or electric shock do
not expose this equipment to rain or moisture
WARNING:

1.1. General
Master Audio le da las gracias por la confianza depositada en los
productos de la serie B. Sugerimos lea detalladamente las
siguientes instrucciones a fin de obtener unos resultados acústicos
óptimos para el sistema.
1.2. Características y presentación
Su nuevo conjunto de altavoces B5A es un sistema acústico activo
de dos vías diseñado para aplicaciones “indoor” (interiores).
Gracias a su óptimo diseño, la B5A es ideal para múltiples
aplicaciones: salas de conferencia, escuelas, home Studio, etc…
Las principales características del sistema de altavoces son:
•Sistema de altavoces autoamplificado (una unidad activa y
una unidad pasiva)
•Tres entradas disponibles:
a) Balanceada estéreo mediante conector de 5 pins
b) No balanceada estéreo L & R mediante conectores RCA
c) Entrada de línea estéreo mediante conector Mini Jack 3,5mm
•Tres salidas disponibles:
d) Salida hacia el recinto pasivo del canal derecho (4 ohms)
e) Salida hacia un subwoofer externo activo
f) Salida “link”, para encadenar parejas adicionales de
altavoces activos
•Potenciómetros de control BASS, TREBLE, VOLUME
•Diseño bass-reflex para una respuesta en graves óptima
•Amplificador estéreo incorporado 30W+30W
•Alimentación universal con rango de 90 a 240V AC
•Apagado automático (modo STBY)
•Recinto en ABS
•Woofer de 5.25” con cono de poligrafito y suspensión en goma
•Tweeter de 1” de titanio
1. INTRODUCCIÓN

•Filtro pasivo de dos vías de 1er orden LPF y 3er orden HPF
•Patas de goma para uso en mesa
•Dos insertos de M5 para acoplar soporte de pared opcional
SP-5A
2. PANEL DE CONTROL Y CONEXIONES (Recinto activo)
A: Conector SPEAKER OUTPUT: Señal de salida hacia el recinto
pasivo derecho (4 ohms)
B: Conector de ENTRADA terminal block de 5 pins: Señal de entrada
balanceada con sensibilidad 1.5V
C: Conector de ENTRADA L&R RCA estéreo: Señal de entrada no
balanceada con sensibilidad 1V
D: Conector de ENTRADA Mini Jack estéreo de 3.5mm: Señal de
entrada no balanceada con sensibilidad 0.775V
E: Conector de SALIDA Mini Jack de 3.5mm SUB OUT: Cuando se
necesite, conectar a esta salida un subwoofer activo para una
respuesta en baja frecuencia máxima
F: Conector de SALIDA Mini Jack 3.5mm LINK OUT: Cuando sea
necesario, conectar otra pareja de cajas activas
G: POWER/STANDBY LED1: Se ilumina en color verde cuando está
en funcionamiento (interruptor de alimentación en posición ON o
STBY). Se ilumina en color rojo cuando se activa el modo de reposo
(interruptor de alimentación en posición STBY)
H: VOLUME: Rotar el potenciómetro para ajustar el volumen de
audio
I: TREBLE: Rotar el potenciómetro para ajustar el nivel de agudos
J: BASS: Rotar el potenciómetro para ajustar el nivel de graves
K: Interruptor POWER: Para encender el recinto ON, OFF, STBY 2
L: Base de entrada AC: Para conectar el cable de alimentación AC.
Para su seguridad use siempre una base con toma a tierra.
1 En modo STBY, el LED se ilumina en verde si se detecta señal de entrada
y se ilumina en rojo si no se detecta señal durante 2 minutos
2Cuando se selecciona el modo STBY, el altavoz activa el modo reposo
cuando no se detecta señal durante 2 minutos (consumo 0.7W solamente)

Fig.1. Panel de control y conexiones B5A (recinto activo)
B
D
EF
G
A
C
HI J
K L

3. PANEL DE CONEXIONES (Recinto pasivo)
A: Conector de ENTRADA terminal block de 2 pins: Para conectar el
altavoz pasivo al altavoz activo. IMPORTANTE: Respetar siempre la
polaridad de los altavoces para evitar problemas de fase entre los
recintos.
Fig.2. Panel de conexiones B5A (recinto pasivo)
4. MONTAJE Y COLOCACIÓN
Para una instalación óptima del sistema, recomendamos seguir los
siguientes puntos:
•Use solo cables de calidad, evitando de esta manera
interferencias, pobre señal y ruidos
•Evite interferencias de aparatos eléctricos vecinos
•Posicione sus cajas B5A lejos de polvo, humedad o calor
excesivo
•Escoja la mejor posición para sus altavoces. Pruebe diferentes
localizaciones antes de determinar cual es la correcta.
•Cuando use el soporte de colgado opcional, asegúrese que la
pared es del material apropiado (madera sólida y resistente,
ladrillos o hormigón)
A

•Asegúrese que la posición de colgado esté libre de
conductos eléctricos, conductos de agua, etc…
5. CONEXIONES
Para instalar el sistema de altavoces siga las instrucciones:
•Conecte los terminales “+” y “-“ de la caja activa a los
terminales “+” y “-“ de la caja pasiva, mediante el cable
suministrado
•Conecte la fuente de señal a una de las entradas (mixer,
CD o reproductor DVD, portátil, smartphone, etc…)
•Conecte la señal de alimentación a una base de corriente
(con toma a tierra)
•Ajuste el volumen de la señal de entrada
•Ajuste el control de volumen situado en la parte trasera del
panel del amplificador
•Ajuste los controles de agudos y graves situados en la parte
trasera del panel del amplificador
•Si es necesario, conecte otro set de altavoces a través del
conector LINK OUTPUT
•Si es necesario, cuelgue los altavoces a la pared mediante
el soporte opcional (ver manual instrucciones “SP-5A”).
6. CONTROLES TREBLE y BASS
Use los controles BASS y TREBLE para variar la respuesta en baja
y alta frecuencia de los altavoces.
•CONTROL BASS (Graves)
MAX: Low-Shelf +4dB
MIN: Low-Shelf -8dB
•CONTROL TREBLE (Agudos)
MAX: Hi-Shelf +4dB
MIN: Hi-Shelf -12dB

Fig.3. Control Bass
Fig.4. Control Treble
+
-
Fig.5. Conexionado recinto activo a recinto pasivo