Proficient C840
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| Depth: | 149 mm |
| Description: | Built-in, number of lanes: 2, passive, closed type |
| Width: | 283 |
| Height: | 283 |
| Additional Information: | Swivel tweeter |
| Type: | Passive |
| Number of lanes: | 2 |
| Impedance: | 8 ohm |
| Sensitivity: | 92 dB |
| Mounting hole: | 248 |
| Location: | Embedded |
| Maximum frequency: | 22000 Hz |
| Minimum frequency: | 40 Hz |
| Acoustic radiation: | Monopolar |
| Acoustic design: | Closed type |
| RF driver dimensions: | 25.4mm |
| Woofer dimensions: | 203.2 mm |
| RF emitter type: | Dome |
| Emitter type: | Dynamic |
| Rated power: | 150 W |
| Sensitivity Measurement Options: | DB/W/m |
| Ceiling mounting: | There is |
| Removable grid: | There is |