The Apart CM4 (911.1546.900) is a 4 inch dual cone ceiling and panel speaker rated 16 ohms with a 100mm mounting depth. Its enclosed back can delivers full sound and the steel grille carries a removable Apart logo. Suited to background music distribution where up to 4 units can be wired in parallel, including strip metal and perforated tile ceilings.
Key Features
Dual cone driver with 4 inch coated paper woofer
Enclosed back can for full, rich sound
16 ohm low impedance operation
Up to 4 units can be wired in parallel
100mm mounting depth for varied ceiling types
Two spring mounting system
Steel grille with removable Apart logo
180 degree vertical dispersion at 1kHz
Suited to strip metal and perforated tile ceilings
Specifications
| Loudspeaker system | Dual cone |
| Woofer size | 4 inch, coated paper |
| Impedance | 16 ohms |
| Dynamic power | 30 W |
| Sensitivity (1W/1m) | 88 dB |
| Max SPL (1m) | 103 dB |
| Frequency response | 100 Hz – 20 kHz |
| Vertical dispersion (1kHz) | 180 degrees |
| Mounting | 2 springs |
| Construction | Steel grille, aluminium |
| IP rating | IP60 |
| Outside diameter | 135 mm |
| Cutout | 108 mm |
| Depth | 107 mm |
| Weight | 0.79 kg |





