
The Fonestar KS-12B is an all-in-one ceiling speaker sound kit consisting of a pair of coaxial ceiling speakers—one active with an integrated amplifier and one passive—designed for wireless stereo sound in small to medium-sized rooms.
Key Features & Specifications:
| Component | Feature | Specification |
| System Type | Ceiling Speaker Kit (Active + Passive) | Integrated Stereo Amplifier |
| Amplifier Power (RMS) | Integrated Amplifier | 2 x 20 W RMS |
| Speakers | Configuration | Coaxial: 6'' woofer and 1'' tweeter @ 8 Ω (in both speakers) |
| Playback Sources | Built-in Player | Bluetooth 5.3 receiver (10m range), USB player (mp3/wav files) |
| Input | Line Input | 1 stereo aux, Euroblock connector |
| Audio Performance | Frequency Response | 60–20,000 Hz |
| Max SPL | Acoustic Pressure | 101 dB @ max W/1m |
| Controls | User Features | Volume limiter (50%/100%), Stereo/mono selector, 5 selectable equalizations, USB playback mode controls. |
| Power Supply | External Adapter | 24 V DC, 3 A (adapter included) |
| Speaker Design | Grille/Material | Frameless aluminium round grille, ABS enclosure |
| Dimensions | Speaker (Ø x D) | 185 mm Ø x 75 mm depth |
| Cutout Hole | Installation Hole | 170 mm Ø |
| Accessories Included | Connectivity | 5 m speaker cable, 1 m remote control receiver extension cable, remote control, batteries. |
| Software Note | Bluetooth Customization | Possibility to change Bluetooth ID and password with PC software. |