citronic 178.228UK Compact Active Subwoofer Cabinet User Manual
- June 14, 2024
- citronic
Table of Contents
Citronic 178.228UK Compact Active Subwoofer Cabinet
Caution
Please read this manual carefully before operating Damage caused by misuse
is not covered by the warranty
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 on 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 constitutes 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 it 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.
Rear panel layout
- Output level control
- Line input – combo XLR / jack
- Line output – XLR
- Phase switch 0°/180°
- Boost switch
- Power on/off switch
- IEC mains inlet & fuse holder
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 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 the 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 a balanced XLR connection or a 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 onto 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 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 labeled 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 instruments. 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.
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 of 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.
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