Celestion C-MUSIC BA28 User manual

BA28
Portable Busking and Music System

Important Safety Instructions!
Read before connecting!
This product has been built by the manufacturer in accordance
with IEC 60065 and left the factory in safe working order. To
maintain this condition and ensure non-risk operation, the
user must follow the advice and warning comments found
in the operating instructions. If this product shall be used in
vehicles, ships or aircraft or at altitudes exceeding 2000 m
above sea level, take care of the relevant safety regulations
which may exceed the IEC 60065 requirements.
WARNING: To prevent the risk of fire and shock hazard, do not
expose this appliance to moisture or rain. Do not open case
– no user serviceable parts inside. Refer service to qualified
service personnel.
This symbol, wherever it appears, alerts you to
the presence of uninsulated dangerous voltage inside the
enclosure – voltage that may be sucient to constitute a risk
of shock.
This symbol, wherever it appears, alerts you to
the presence of externally accessible hazardous voltage.
External wiring connected to any terminal marked with
this symbol must be a “ready made cable” complying with
the manufacturers recommendations, or must be a wiring
installed by instructed persons only.
This symbol, wherever it appears, alerts you to
important operating and maintenance instructions in the
accompanying literature. Read the manual.
This symbol, wherever it appears, tells you: Take care!
Hot surface! To prevent burns you must not touch.
All electrical and electronic products including batteries
should be disposed of separately from the municipal waste
stream via designated collection facilities appointed by the
government or the local authorities.
Read these instructions. Keep these instructions.
Follow all warnings and instructions marked on the product
and in this manual.
• Do not use this product near water. Do not place the product
near water, baths, wash basins, kitchen sinks, wet areas,
swimming pools or damp rooms.
• Do not place objects containing liquid on the product – vases,
glasses, bottles etc.
• Clean only with dry cloth.
• Do not remove any covers or sections of the housing.
• The set operating voltage of the product must match the
local mains supply voltage. If you are not sure of the type of
power available consult your dealer or local power company.
• Before connecting the device, please ensure that the mains
supply you are using is equipped with adequate protection
against short circuiting and grounding faults when the
device is plugged in.
• To reduce the risk of electrical shock, the grounding of this
product must be maintained. Use only the power supply
cord provided with this product, and maintain the function
of the center (grounding) pin of the mains connection at any
time. Make sure the mains outlet used provides a proper
protective ground connection.
• Do not defeat the safety purpose of the polarized or
groundingtype plug. A polarized plug has two blades with
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
replacement of the obolete outlet.
• Protect the power cord from being walked on or pinched
particularly at plugs, convenience receptacles, and the point
where they exit from the device! Power supply cords should
always be handled carefully. Periodically check cords for cuts
or sign of stress, especially at the plug and the point where
the cord exits the device.
• Never use a damaged power cord.
• Unplug this product during lightning storms or when unused
for long periods of time.
• This product can be fully disconnected from mains only by
pulling the mains plug at the unit or the wall socket. The
product must be placed in such a way at any time, that
disconnecting from mains is easily possible.
• Fuses: Replace with IEC127 (5x20mm) type and rated fuse
for best performance only! It is prohibited to use “patched
fuses” or to short the fuse-holder. Replacing any kind of
fuses must only be carried out by qualified service personal.
• Refer all servicing to qualied service personnel. Servicing
is required when the unit has been damaged in any way,
such as:
- When the power cord or plug is damaged or frayed.
- If liquid has been spilled or objects have fallen into the
product.
- If the product has been exposed to rain or moisture.
- If the product does not operate normally when the operating
instructions are followed.
- If the product has been dropped or the cabinet has been
damaged.
• Do not connect external speakers to this product with an
impedance lower than the rated impedance given on the
product or in this manual. Use only cables with sucient
cross section according to the local safety regulations.
• Keep away from direct sunlight.
• Do not install near heat sources such as radiators, heat
registers, stoves or other devices that produce heat.
• This apparatus is for moderate climates areas use, not
suitable for use in tropical climates countries.
• Do not block any ventilation openings. Install in accordance
with manufacturer’s instructions. This product must not be
placed in a built-in installation such as a rack unless proper
ventilation is provided.
• Always allow a cold device to warm up to ambient
temperature, when being moved into a room. Condensation
can form inside it and damage the product, when being used
without warming up.
• Do not place naked ame sources, such as lighted candles
on the product.
• The device must be positioned at least 20 cm/8“ away from
walls.
• Use only with the cart, stand, tripod, bracket or table
specified by the manufacturer or sold with the product.
When a cart is used, use caution when moving the cart/
product combination to avoid injury from tip-over.
• Use only accessories recommended by the manufacturer,
this applies for all kind of accessories, for example protective
covers, transport bags, stands, wall or ceiling mounting
equipment. In case of attaching any kind of accessories to
the product, always follow the instructions for use, provided
by the manufacturer. Never use fixing points on the product
other than specified by the manufacturer.
• This appliance is NOT suitable to be used by any person or
persons (including children) with limited physical, sensorical
or mental ability, or by persons with insucient experience
and/or knowledge to operate such an appliance. Children
under 4 years of age must be kept away from this appliance
at all times.
• Never push objects of any kind into this product through
cabinet slots as they may touch dangerous voltage points
or short out parts that could result in risk of fire or electric
shock.
• This product is capable of delivering sound pressure levels
in excess of 90 dB, which may cause permanent hearing
damage! Exposure to extremely high noise levels may
cause a permanent hearing loss. Wear hearing protection if
continously exposed to such high levels.
• The manufacturer only guarantees the safety, reliability and
eciency of this product if:
- Assembly, extension, re-adjustment, modications or repairs
are carried out by the manufacturer or by persons authorized
to do so.
- The electrical installation of the relevant area complies with
the requirements of IEC (ANSI) specications.
- The unit is used in accordance with the operating
instructions.
• This product is optimized for use with music and speech
signals. Using this product with sine wave, square wave or
other kind of measuring signals at higher level may lead to
severe damage of the product.
General Notes on Safety for Loudspeaker
Systems
Mounting systems may only be used for those
loudspeaker systems authorized by the manufacturer and only
with the mounting accessories specified by the manufacturer
in the installation instructions. Read and heed the
manufacturer’s installation instructions. The indicated load-
bearing capacity cannot be guaranteed and the manufacturer
will not be liable for damages in the event of improper
installation or the use of unauthorized mounting accessories.
The system’s load-bearing capacity cannot be guaranteed and
the manufacturer will not be liable for damages in the event
that loudspeakers, mounting accessories, and connecting and
attaching components are modified in any way.
Components aecting safety may only be repaired by the
manufacturer or authorized agents, otherwise the operating
permit will be voided.
Installation may be performed qualified personnel only,
and then only at pick-points with sucient load-carrying
capacity and in compliance with local building regulations. Use
only the mounting hardware specified by the manufacturer
in the installation instructions (screws, anchors, etc.). Take all
the precautions necessary to ensure bolted connections and
other threaded locking devices will not loosen.
Fixed and portable installations (in this case,
speakers and mounting accessories) must be secured by two
independent safeties to prevent them from falling. Safeties
must be able to catch accessories or parts that are loose
or may become loose. Ensure compliance with the given
national regulations when using connecting, attaching, and
rigging devices. Factor potential dynamic forces (jerk) into the
equation when determining the proper size and load-bearing
capacity of safeties.
Be sure to observe speaker stands’ maximum
load-bearing capacity. Note that for reasons of design and
construction, most speaker stands are approved to bear
centric loads only; that is, the speakers’ mass has to be
precisely centered and balanced. Ensure speaker stands are
set up stably and securely. Take appropriate added measures
to secure speaker stands, for example when:
- the oor or ground surface does not provide a stable, secure
base.
- they are extended to heights that impede stability.
- high wind pressure may be expected.
- there is the risk that they may be knocked over by people.
Special measures may become necessary as precautions
against unsafe audience behavior. Do not set up speaker
stands in evacuation routes and emergency exits. Ensure
corridors are wide enough and put proper barriers and
markings in place when setting speaker stands up in
passageways. Mounting and dismounting are especially
hazardous tasks. Use aids suitable for this purpose. Observe
the given national regulations when doing so.
Wear proper protection (in particular,
a helmet, gloves, and safety shoes) and use only suitable
means of ascent (ladders, scaolds, etc.) during installation.
Compliance with this requirement is the sole responsibility of
the company performing the installation.
WARNING! After installation, inspect the system
comprised of the mounting fixtures and loudspeakers to
ensure it is properly secured.
The operator of loudspeaker systems (fixed or portable) must
regularly inspect or task a third party to regularly inspect all
system components in accordance with the given country’s
regulations and have possible defects repaired immediately.
We also strongly recommend maintaining a logbook or the like
to document all inspections.
When installing speakers for longer lasting or permanent
outdoor operation, be sure to take into account the stability
and loadbearing capacity of platforms and surfaces; loads
and forces exerted by wind, snow, and ice; as well as thermal
inuences. Also be sure to provide sucient safety margins
for the rigging points used for own systems. Observe the
given national regulations when doing so.
Professional loudspeaker systems can produce harmful
volume levels. Even prolonged exposure to seemingly
harmless levels (starting at about 95 dBA SPL) can cause
permanent hearing damage! Therefore we recommend that
everyone who is exposed to high volume levels produced by
loudspeaker systems wears professional hearing protection
(earplugs or earmus).

C-Music By Celestion - BA28
3
1 General Information
1.1 Unpacking and Inventorying
When you rst unpack your BA28, take a quick inventory to make sure
the package comes complete with all the contents. A power supply
unit, two battery packs are included.
1.2 Powering Up
With the External Power Supply Unit
First connect the external power supply unit to the DC In socket 20 on
the rear panel of the BA28, and then connect the power cord to a power
outlet.
For the First Time with Battery Packs
Remark: Make sure to charge both battery packs fully before using for
the first time.
Unfasten the wing screw on the rear battery compartment by turning
it counterclockwise. Remove the cover. Slide the two included battery
packs into the compartment until you feel them click firmly into place.
Put the battery compartment cover back and fasten the wing screw by
turning it clockwise.
The two batteries will start charging successively as soon as you
connect BA28 to a power supply. The battery in slot A is charged rst;
the battery in slot B comes second. (Refer to section 3 - Operating
BA28 on Battery Power, for more information.)
BA28 immediately switches over to battery-operated mode when the
power supply unit is disconnected. One of the two control LEDs on
the battery compartment will ash slowly to indicate which battery
is currently in use. BA28 switches over to another battery pack
seamlessly (hot-swappable).
Remarks: Charging the battery packs in BA28 takes up to 5 hours,
which is shortened to 2 hours with external fast charger (sold
separately)

C-Music By Celestion - BA28
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1Master
This knob determines BA28’s overall level. We recommend making a
habit of turning it all the way down to the far left before powering up
the device.
• BT (Bluetooth) / Aux In
2Pairing
This button activates the pairing process that connects BA28 to
Bluetooth-enabled devices so you can stream audio. The blue LED
indicator alongside the button lights up continuously when a Bluetooth
connection is active. See section 4 - Bluetooth, for more details.
3Volume
This knob adjusts the level of the BT signal or the signal from AUX
Input. The BT and Aux input share the same channel in the mixer
section of BA28 and both inputs are stereo summed to the build-in
mixer , AUX input will have the priority if both channels are activated at
the same time.
Remark: BA28 Remote app also provides 2-band EQ , Vocal Remover
and Pitch control for BT/Aux In
• Guitar
4Reverb
The Reverb knob controls the amount of signal sent to the internal
reverb eect.
5Volume
The Volume control adjusts the level of the signal sent to Guitar input.
6Input
Use this unbalanced 1/4” (6.3 mm) jack to connect an instrument with a
high-impedance (Hi-Z) output such as a guitar or guitar eects device.
This input also accepts line level input.
Remark: You can also select input source from Electric Guitar or
Instrument (Electric Acoustic Guitar) via BA28 Remote APP.
7Bass
Use this rotary knob to adjust the input signal’s low frequencies.
8Treble
Use this rotary knob to adjust the input signal’s high frequencies.
9Celestion IR
This button activates the Celestion Impulse Response (IR) guitar
cabinet simulator. Its LED lights up green when the cabinet simulator is
on. Press once more to deactivate.
The free BA28 Remote app oers three types of signature Celestion
speaker drivers simulation:
• Celestion Greenback
• Celestion Blue
• Celestion Vintage 30
The factory default is the Celestion Greenback.
• Mic / Inst. 1 and 2
10 Reverb
The Reverb knob controls the amount of signal sent to the internal
reverb eect.
11 Volume
The Volume control adjusts the level of the signal sent to Mic/Inst. 1
and Mic/Inst. 2. Please note that you will have to adjust the level when
switching from microphone to line signals.
12 Bass
This rotary knob adjusts the input signal’s low frequencies.
13 Treble
This rotary knob adjusts the input signal’s high frequencies.
14 Input Mic/Line/Inst.
This is a balanced combo input.
• For microphone signal, please use XLR (Cannon) input. If you connect
microphone with jack input , the level may be low.
• For line-input level, use 1/4” (6.3 mm) TRS or TS jack input . If you
connect line-level input with XLR (Cannon) cable, the level may be too
high and signal may be distorted.
• For Hi-Z Musical Instrument signal (Electric Acoustic Guitar) use 1/4”
(6.3 mm) TS jack.
Remark: You can also select input source from Mic/Line or Instrument
(Electric Acoustic Guitar) via BA28 Remote APP.
2.1 Control Panel
2 Connections and Control Features
1 3
24
7 8
5
14 14
9
6
12
10
13
11
12
10
13
11

C-Music By Celestion - BA28
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15 Aux In
Use this stereo 1/8” (3.5mm) mini jack to patch in a stereo line signal,
for instance, from a tablet / phone, mixing console or keyboard (with
an appropriate cable). The BT / Aux In Volume knob adjusts this input’s
level.
16 Aux Out
Use this stereo 1/8” (3.5mm) mini jack to patch out the mixed
unbalanced stereo signal.
The Master Volume knob controls this signal’s level by default.
It is suggested to use a cable shorter then 20 feet length, because
unbalanced cables can pick up noise along the cable. This minimizes the
risk of unwanted noise.
17 Rev Mute Footswitch
This 1/4" (6.3 mm) jack accepts a standard one-way footswitch serving
to switch the internal Reverb on and o. It is a very convenient tool for
muting the eect, for instance, for announcements.
18 FX Guitar (Send/Return)
These unbalanced 1/4” (6.3 mm) jacks connects to an eect unit /
eect chain.
For the “Send” output the signals from Guitar channel to an external
eect device.
For the “Return” input, connect the output of eect unit / eect chain
back to the BA28.
19 Service
This USB interface is used for service purposes. For updating the
rmware of BA28, connect PC or Mac Computer to this port with
USB to micro USB cable. Please refer to www.c-music.com for more
information.
Caution: Do not use this port to charge mobile devices, smartphones or
tablets.
20 DC In
Connect the included external power supply to this socket.
21 Power
This button switches BA28 on and o. To switch BA28 on, press and
hold the button for 1 second. The Power LED lights up green when the
device is on. To switch BA28 o, press and hold the button for two
seconds.
22 Battery Pack A / B Indicators
This LED indicates the two battery packs charging status. See the next
section - Operating BA28 on Battery Power, for more information.
2.2 Rear Panel
17 18 21 22
15 16 19 20

C-Music By Celestion - BA28
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3 Operating BA28 on Battery Power
BA28 can operate for 12 hours on two fully charged battery packs and 6
hours on one battery pack.
The battery pack in slot A always has higher priority than slot B. The
battery pack in slot A is always used or charged first when the device is
connected to power supply with two battery packs installed.
BA28 promptly switches to the battery pack in slot B when the battery
pack in slot A is depleted.
Charging Batteries
Battery packs may be charged in the slot on BA28 or in an optional
quick charger. It takes around 5 hours to fully charge one completely
empty battery in the BA28 slot and around 10 for both, regardless of
whether BA28 is on or o. In other words, you can operate BA28 at
full power using the mains adapter and charge the battery pack at the
same time.
The optional quick charger charges the battery pack in around 2 hours.
Hot Swap Option
You can change batteries seamlessly while BA28 is operating. If BA28
switches to battery pack B because battery pack A is depleted, you can
remove battery pack A without turning o the unit and insert a third
battery pack (optional), into slot A. If necessary, you can also change
battery B once the device detects battery A. You can hot-swap the
battery pack without disturbing the audio input and output, including
the BT streaming signal.
Remarks: You can hot-swap battery packs even if you only have 2
battery packs.
If the device indicates the charge is running low while you are operating
it with just one battery:
1. Insert the second fully charged battery pack into the free slot, wait
until it is detected.
2. Remove the drained battery pack.
3. Charge it at the nearest power outlet using the external quick
charger.
Remark : Hot-swap function can only be applied when the battery
pack’s power is over 30%.
LED Indicators
The two LEDs on the battery slot serve two purposes:
When operating BA28 on battery power: When batteries are inserted
and BA28 is switched on, the LEDs indicate which battery is currently
supplying voltage and is being drained. Just one LED ashes as just one
battery provides power at any one time. The other LED for the battery
that is on standby lights up continuously to indicate it is ready to
operate. The LED does not light up if the slot is empty or a battery has
not been detected.
When operating BA28 on mains power: A ashing LED indicates which
battery is currently being charged. The ashing stops and the LED
lights up continuously when the battery is fully charged.
The LEDs’ color indicates the charging status.
Green: 100 – 60% • Yellow: 60 – 30% • Red: 30 – 0%
4 Bluetooth
Pairing a Bluetooth-Enabled Device
• Press the Pairing button for 2 seconds
• The blue Bluetooth LED ashes slowly and BA28 shows
up in the Bluetooth-enabled device’s selection list for 60
seconds
• Select “C-Music BA28 XXXX” on the Bluetooth device to
pair the devices
Remark : XXXX is the ID number (a combination of alphabet and
numbers) randomly generated for each BA28 unit, you can change the
Bluetooth name of BA28 via the setting page in our free BA28 Remote
APP.
• After 60 seconds, the LED will turn o, you have to restart the pairing
process if the connection failed.
The BT / Aux In Bluetooth LED on BA28 lights up blue as soon as the
devices are paired and remains solid blue.
Pairing a Bluetooth Device Automatically
The next time you power up BA28, the system will search for the most
recently paired device for 10 seconds and connect to it automatically.
If BA28 cannot discover the device in 10 seconds, you have to pair the
Bluetooth-enabled device manually.
Switching to Another Bluetooth Device
You cannot switch to another Bluetooth device while a Bluetooth device
is connected or the BA28 is searching for the most recently connected
device.
You will have to repeat the pairing steps, unpair the current device,
then connect the other device.
Remarks: BA28 will only reconnect to the most recently paired device,
previously paired device will not be reconnected automatically.
Range
BA28 supports Bluetooth 5.0 . Bluetooth 5.0-enabled devices’ range
can extend up to 40 meters. Devices that do not support Bluetooth 5.0
typically run up to 10 meters, but it depends on factors such as the
given device’s quality, transmission power and current environment. For
example, walls obstructing the transmission path or a protective cover
on the Bluetooth device impede radio communication. The streaming
signal drops out if the device moves out of range or behind walls that
block the path. The connection re-establishes automatically if you bring
the Bluetooth device back in range within 60 seconds, in which case the
Bluetooth LED will become solid blue again.
Bluetooth Audio Stream Stutters or Drops Out
A cable is less susceptible to interference than Bluetooth, which has
to send a constant stream of audio data via a radio frequency. To get a
good audio stream without any glitches, it is best to align BA28 and the
source device in line of sight of one another.
Remark: Your source device may be set up to issue ringtones,
notifications and system sounds. The speakers will render these sounds
along with the audio stream if they arrive via Bluetooth, so be sure to
disable these functions on your Bluetooth device.
To learn more about Bluetooth, visit www.bluetooth.org.
6
2

C-Music By Celestion - BA28
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5 BA28 Remote App
C-Music by Celestion oers a free app for iOS (iPad version coming
soon) and Android that lets you control BA28 remotely from your
smartphone or tablet.
(Apple app store)
(Google app store)
The app supports full feature of BA28:
*Three original Celestion Impulse Responses (IR) Cabinet simulation for
Guitar channel –
- Celestion Greenback,
- Celestion Blue,
- Celestion Vintage 30
*Automatic Feedback Eliminator (AFE) (16-band notch lter) and
Compressor for Mic/Inst. Channel 1 & 2
*2 band EQ for ALL input channels
*2 Speaker Voicing (Wedge & Sit) for dierent scenario
*Aux output Pre/Post Mode
*Save and recall up to 9 scene memory
*4 Standby Time : 20 mins /1 hr/2 hrs and O (always on), [default
setting is 20 mins.]
and more.
Remark : Please wait for around 20 seconds when connecting the BA28
to mobile device for the first time, this is because the surrounding
devices need to be searched.
After the BA28 remote app is successfully connected to the machine, it
will take around 3 seconds to connect from the next connection.
Please visit www.c-music.com for more information.
6 Factory reset
If factory reset is needed, press and hold both Celestion IR and BT
Pairing button for at least two seconds. Both LEDs will ash to indicate
the factory reset and BA28 will switch o automatically. Note that all
scene memory and settings will be cleared to default settings.
7 Firmware Update
This product enables you to update the unit firmware to improve the
operation, add functions, and correct possible malfunctions.
Details on updating the firmware are available on the following
website:
http://www.c-music.com/
For information about updating the unit,
please refer to the firmware update guide available on the website.
8 Technical Specifications
C-Music By Celestion - BA28
Max. SPL peak @ 10% THD 123 dB half-space
Frequency response +/- 3 dB, 65 Hz – 18 kHz
Frequency response -10 dB, 55 Hz – 20 kHz
Power output 60 W Class D
Total battery operating
time
Up to 12 h (with two fully charged
battery packs)
Active protective circuits Peak and RMS level limiter (one for HF
and LMF each)
LMF woofer 1x 8”, 1” voice coil
HF driver 1”, 1” voice coil
Dispersion 70° x 70°
Active Crossover Frequency 2.5 kHz
Audio Input 2x combo XLR/ 1/4” (6.3 mm) TRS jack
(Mic/Line/Inst.)
1x 1/4” (6.3 mm) TS jack (Guitar)
1x stereo 1/8” (3.5mm) mini jack (Aux)
Audio Output 1x unbalance stereo 1/8” (3.5mm) mini
jack (Aux)
EQ Controls 2-band EQ for all input channels
Celestion Impulse Response
(IR)
- Celestion Greenback
- Celestion Blue
- Celestion Vintage 30
Bluetooth 5.0
Angles up 33°
Handles Metal Grip
Housing MDF
Finish Grey acrylic enamel
Front grille 1.5 mm metal grille
Dimensions (WxHxD) 26.9 x 42.2 x 28.9 cm
Weight 8.5 kg / 18.7 lbs
Power consumption 18W
Battery
Battery capacity 5,200 mAh
Dimensions (WxHxD) 8 x 3 x 8.3 cm
Weight 0.25 kg / 0.6 lbs
Charging time in BA28 Around 5 hours
Charging time in optional
Quick Battery Charger
Around 2 hours
CMBAFC Quick Battery Charger (optional)
Input voltage 20VDC
Output voltage 8.4VDC
Charge current 2.6A
Dimensions (WxHxD) 10 x 7.1 x 4 cm
Weight 0.11 kg / 0.24 lbs