Brand: B&C SPEAKERS
Article number: 21ds115-4
B&C 21 DS 115 4 LF Driver
- 3400 W Continuous power handling
- 4.5 in (116 mm) Voice coil diameter
- Neodymium Inside Slug Magnet material
This next evolution subwoofer uses a new, longer, four layer aluminum voice coil. The result is more energy in the gap, less heat, higher sensitivity, higher power handling, lower distortion and better overall performance. The 21DS115 features a 36 mm long, 4.5 inch diameter (116mm) Copper Clad Aluminum Wire voice coil. With a 1700watt AES power rating, 99 dB sensitivity, and over 17 mm of Xvar, this high energy subwoofer is a significant step forward from similar models in the B&C range, even approaching the performance of our 6” voice coil alternatives.
| Type of speaker | 21″ |
| Nominal Diameter mm | 530 mm |
| Impedance Ohm | 4 Ω |
| Power Handling | 3400 W |
| Frequency range | 30 – 1000 Hz |
| Sensitivity dB | 99.0 |
| Magnet Material | Neodymium Inside Slug |
| Brand | B&C SPEAKERS |
| Type | speaker |
| Nominal Diameter | 530 mm (21.0 in) |
| Nominal Impedance | 4 Ω |
| Minimum Impedance | 3.1 Ω |
| Nominal Power Handling | 1700 W |
| Continuous Power Handling | 3400 W |
| Sensitivity | 99.0 dB |
| Frequency Range | 30 – 1000 Hz |
| Winding Material | Aluminium |
| Former Material | Glass Fibre |
| Winding Depth | 36.0 mm (1.42 in) |
| Magnetic Gap Depth | 14.0 mm (0.55 in) |
| Flux Density | 0.8 T |
| Surround Shape | Triple Roll |
| Cone Shape | Radial |
| Spider | Double Silicone |
| Pole Design | T-Pole |
| Woofer Cone Treatment | TWP Waterproof Both Sides |
| Recommended Enclosure | 130.0 dm3 (4.59 ft3) |
| Recommended Tuning | 40 Hz |
| Resonance Frequency | 30 Hz |
| Re | 2.2 Ω |
| Qes | 0.2 |
| Qms | 11.0 |
| Qts | 0.21 |
| Vas | 274.0 dm3 (9.68 ft3) |
| Sd | 1680.0 cm2 (260.4 in2) |
| η₀ | 3.4 % |
| Xmax | ± 15.0 mm |
| Xvar | ± 17.0 mm |
| Mms | 412.0 g |
| Bl | 28.8 Txm |
| Le | 2.4 mH |
| EBP | 150 Hz |
| Overall Diameter | 547 mm (21.54 in) |
| Bolt Circle Diameter | 527 mm (20.7 in) |
| Baffle Cutout Diameter | 508.0 mm (20.0 in) |
| Depth | 255 mm (10.04 in) |
| Flange and Gasket Thickness | 13 mm (0.51 in) |
| Air Volume Occupied by Driver | 15.0 dm3 (0.53 ft3) |
| Net Weight | 14.8 kg (32.63 lb) |
| Recone kit | RCK21DS1154 |
| Article | B&C 21ds115-4 |
- Drawing
- Datasheet
