Citronic CASA-28BA User manual

CASA-28BA
Compact Active Subwoofer Cabinet
Item ref: CASA-10BA178.228UK
User Manual
Version 1.0
Caution: Please read this manual carefully before operating
Damage caused by misuse is not covered by the warranty

CASA-28BA User Manual
Introduction
Thank you for choosing a CASA-28BA active subwoofer as part of your sound system.
This product is designed to enhance a full-range sound system with powerful sub-frequencies and transients.
Please read this manual to achieve optimum performance from your sub cabinet and avoid damage through misuse.
Package Contents
•CASA-28BA compact active subwoofer
•Mains lead(s)
•User manual
If you find any part is missing or the product has arrived with any problems, please contact your retailer at once.
This product contains no user-serviceable parts, so make no attempt to try to fix or modify this item yourself as this will
invalidate the warranty. We recommend you keep the original package and proof of purchase for any possible
replacement or return issues.
Warning
To prevent the risk of fire or electric shock, do not expose any of the components to rain or moisture.
Avoid impact to any of the components.
No user serviceable parts inside - refer servicing to qualified service personnel.
Safety
•Please observe the following warning conventions
CAUTION: RISK OF ELECTRIC SHOCK
DO NOT OPEN
This symbol indicates that dangerous voltage constituting a risk of electric shock
is present within this unit
This symbol indicates that there are important operating and maintenance
instructions in the literature accompanying this unit.
•Ensure that the correct mains lead is used with adequate current rating and mains voltage is as stated on the unit.
•Avoid ingress of water or particles into any part of the housing. If liquids are spilled on the cabinet, stop using
immediately, allow the unit to dry out and have checked by qualified personnel before further use.
Warning: this unit must be earthed
Placement
•Keep the electronic parts out of direct sunlight and away from heat sources.
•Position the cabinet on a stable surface that is adequate to support the weight of the product.
•Allow adequate space for cooling and access to controls and connections at the rear of the cabinet.
•Keep the cabinet away from damp or dusty environments.
Cleaning
•Use a soft dry or slightly damp cloth to clean surfaces of the cabinet.
•A soft brush can be used to clear debris from controls and connections without damaging them.
•To avoid damage, do not use solvents to clean any parts of the cabinet.

CASA-28BA User Manual
Rear panel layout
Setting up
Position your CASA-28BA active subwoofer on a stable surface capable of supporting the load and vibrations from the
cabinet. For maximum sound delivery, position with the back close to a solid wall or in a corner of the room. The cabinet
may be stood upright for a minimal footprint or on its side with the 35mm pole socket facing upward. A standard 35mmØ
speaker pole can be inserted into this socket to support a full-range or mid-top cabinet to form a full PA stack.
Aim the CASA-28BA sub cabinet towards the audience or listeners and not in direct line of sight with any microphones
that are connected to the sound system. This is to avoid feedback (howling or booming caused by the microphone
“hearing”itself amplified). Also, keep microphone stands away from the subwoofer to avoid vibrations being transferred
to the microphones.
Connect a standard line level (0.775Vrms @ 0dB) output from a mixer or other audio source to the line input of the
CASA-28BA via either balanced XLR connection or 6.3mm (jack) plug. If the signal is to be daisy-chained onto another
active cabinet (full-range or sub), connect the XLR line output from the CASA-28BA to a line input on the active cabinet.
The output of the CASA-28BA is filtered to produce only low frequencies with controlled dynamics using an internal DSP
for optimal performance but the line output is unaffected by this.
Ensure that the output level control is turned fully down and connect the IEC mains inlet to a suitable mains power outlet
using the IEC mains lead provided (or equivalent).
Operation
Switch power on to the CASA-28BA cabinet and whilst playing a line signal into the input, gradually increase the output
level control to the required output level.
A boost switch on the rear panel will add a pre-set increase to the the CASA-28BA output. To avoid damage, do not
switch this in when playing at high volume. It is recommended to turn down the output level control, press in the boost
switch and then increase the output level again to the required volume.
There are 3 LED indicators at the top of the CASA-28BA rear panel, which are labelled CLIP, SIG and POWER.
When the unit is powered up, the POWER LED will be lit. When the subwoofer is playing at normal levels, the SIG LED
will light periodically in sync with the audio signal. If this audio level exceeds the normal levels, the amplifier will “clip”
the signal, producing an aggressive and distorted output and the CLIP LED will light. If this LED lights any more than
momentarily, the output level control should be turned down to a lower setting to avoid overdriving the internal amplifier
or damaging the subwoofer drivers.
Due to the long wavelength of lower frequencies, it is easier for different speakers to be out of phase with each other,
which can have a detrimental effect on the output level. If phase cancellation is suspected between 2 sub cabinets, try
switching the phase switch between 0° and 180° to see which is the loudest or least affected setting. This switch can
also help to avoid feedback with certain microphone placements or types of musical instrument.
Turn down the output level control before powering down the CASA-28BA to avoid loud noises and disconnect from the
mains supply if not being used for long periods.
1.
Output level control
2.
Line input - combo XLR / jack
3.
Line output - XLR
4.
Phase switch 0°/180°
5.
Boost switch
6.
Power on/off switch
7.
IEC mains inlet & fuse holder

CASA-28BA User Manual
Specifications
Power supply
230Vac, 50Hz (IEC)
Construction
15mm MDF with durable texture paint finish
Hardware
Integral carry handle & 35mm pole mount socket
Amplifier: construction
Class-D
Line input
Balanced XLR / 6.3mm jack
Line output
Balanced XLR
Controls
Master level, Phase switch, Boost switch
Drivers
2 x 200mmØ (8“) woofers
Frequency response
55 - 150Hz
Output power rms
400W
Output power max.
700W
Peak output
1400W
SPL max.
122dB
Dimensions
475 x 450 x 250mm
Weight
15.7kg
Disposal: The “Crossed Wheelie Bin” symbol on the product means that the product is classed as Electrical or
Electronic equipment and should not be disposed with other household or commercial waste
at the end of its useful life. The goods must be disposed of according to your local council guidelines.
Errors and omissions excepted. Copyright© 2023.
AVSL Group Ltd. Unit 2-4 Bridgewater Park, Taylor Rd. Manchester. M41 7JQ
AVSL (EUROPE) Ltd, Unit 3D North Point House, North Point Business Park, New Mallow Road, Cork, Ireland.