Subwoofer KEF R400b
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| Weight: | 21.5 kg |
| Depth: | 351 mm |
| Description: | Floor, subwoofer, number of bands: 1, active, closed type |
| Width: | 330 |
| Height: | 365 |
| Type: | Active |
| Number of lanes: | 1 |
| Crossover frequency: | 40-140 Hz |
| Location: | Floor |
| Maximum frequency: | 140 Hz |
| Minimum frequency: | 26 Hz |
| Spikes: | There is |
| Acoustic radiation: | Monopolar |
| Acoustic design: | Closed type |
| Speaker type: | Subwoofer |
| Woofer dimensions: | 225 mm |
| Emitter type: | Dynamic |
| Maximum sound pressure: | 111 dB |
| Rated power: | 500 W |
| Phase adjustment: | There is |
| Crossover Frequency Adjustment: | There is |