Audibax CM508-BT - Pair of 2-way Bluetooth ceiling speakers (2 x 30 W), 5.25” woofer and ultra-thin magnetic grille
The Audibax CM508-BT are in- ceiling Bluetooth speakers designed for discreet sound reinforcement in homes, shops, offices, and classrooms, maintaining a clean aesthetic thanks to their ultra-thin, magnetically attached metal grille . The system consists of an active speaker (with integrated power amplifier and Bluetooth receiver) and a passive speaker , delivering 2 x 30 W in a master/slave configuration for Hi-Fi stereo listening. Its two-way architecture combines a 5.25” (≈133 mm) woofer and a 1” (≈25 mm) adjustable silk dome tweeter , allowing high frequencies to be directed towards the listening area for greater clarity.
With a frequency response of 100 Hz to 20 kHz and an SPL of 86 dB (1 W/1 m) , they offer balanced sound for background music, lectures, and multimedia content. Installation is quick: simply cut a circular hole in the ceiling , secure with folding tabs, and attach the magnetic grille. The lightweight yet rigid ABS housing ensures durability, while the active speaker is powered directly by AC 220 V, 50/60 Hz . Important note: Due to Bluetooth protocol limitations, it is not possible to use two or more pairs of this model simultaneously .
Main features
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Connectivity: Integrated Bluetooth (direct pairing from mobile/PC to speakers)
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Configuration: active + passive pair with power stage in the active speaker
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Output power: 2 × 30 W
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Ways: 2 (5.25” woofer + 1” adjustable silk tweeter)
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Frequency response: 100 Hz – 20 kHz
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SPL (1 W/1 m): 86 dB
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Woofer impedance: 8 Ω
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Grille: extra-flat metal with magnetic fixing
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Body material: ABS
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Color: white
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Power supply: AC 220 V, 50/60 Hz (active speaker)
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Installation: fixing by folding tabs; recessed into false ceiling
Product benefits
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Aesthetic integration: extra-flat magnetic grille that sits flush with the ceiling.
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Defined listening: adjustable silk tweeter to fine-tune the room's sweet spot.
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Simple assembly: active+passive system with a single power socket on the master speaker.
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Direct connectivity: Play audio from smartphone, tablet or computer without additional equipment.
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Reliability in continuous light use: robust materials (ABS + metal mesh) for fixed installations.
Use cases
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Homes: kitchens, living rooms or passageways with discreet background music.
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Retail and hospitality: shops, cafes, consulting rooms and offices.
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Education and multipurpose rooms: classrooms, academies and meeting rooms.
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Lightweight rental installation: quick and clean solutions where aesthetics are paramount.
Frequently Asked Questions
Can I use multiple pairs at the same time with the same mobile phone? No. Due to the very nature of Bluetooth, two or more CM508-BT pairs cannot be used simultaneously with the same transmitter to create a multi-zone or multi-room setup.
What is the cutting diameter and minimum depth? The manufacturer specifies a cutting diameter of 170 mm and a minimum installation depth of 88.9 mm . Some distributors list 166/90 mm; as a safety practice, we recommend following the template/measurement in the manual and verifying it on-site before cutting.
How do I pair them? Activate Bluetooth on your device, search for “ BT-SPEAKER ”, and connect. When turned on, they will automatically pair with the last used device.
Installation recommendations
- Plan the 220V outlet point on the active speaker and the speaker wire path to the passive speaker.
- Make the cut with a 170 mm diameter and confirm ≥89 mm free depth.
- Point the tweeter towards the main listening area and place the magnetic grille at the end.
Project description
Pair of Audibax CM508-BT in-ceiling speakers with Bluetooth , active+passive system, 2 x 30 W , 2-way (133 mm woofer, 8 Ω + 25 mm adjustable silk dome tweeter), frequency response 100 Hz–20 kHz , SPL 86 dB (1 W/1 m) , magnetic metal grille , white ABS housing , outer diameter 214 mm , cutout diameter 170 mm , minimum depth 88.9 mm , AC 220 V 50/60 Hz power supply . Limitation: does not support simultaneous use of multiple pairs via Bluetooth .
