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B&C 21SW115 - 21" 1700W 4 Ohm Loudspeaker
- 3400 W continuous program power capacity
- 116 mm (4.5 in) split winding copper voice coil
- 33 - 1000 Hz response
- 97 dB sensitivity
- 60 mm peak-to-peak excursion before damage
- Neodymium magnet allows a very high force factor and linear excursion
- Double silicone spider with optimized compliance
- Ventilated voice coil gap for reduced power compression
- Aluminium demodulating ring for very low distortion
Specifications:
- Nominal diameter 530 mm (21.0 in)
- Nominal impedance 4 Ω
- Minimum impedance 4.2 Ω
- Nominal power handling * 1700 W
- Continuous power handling * 3400 W
- Sensitivity (1W/1m) * 97.0 dB
- Frequency range 33 - 1000 Hz
- Voice coil diameter 116 mm (4.5 in)
- Winding material Copper
- Former material Glass Fibre
- Winding depth 34 mm (1.34 in)
- Magnetic gap depth 14 mm (0.55 in)
- Flux density 1.15 T
Design
- Surround shape Triple Roll
- Cone shape Radial
- Magnet material Neodymium Inside Slug
- Spider Double Silicone
- Pole design T-Pole
- Woofer cone treatment TWP Waterproof Both Sides
- Recommended enclosure 250.0 dm3 (8.83 ft3)
- Recommended tuning 32 Hz
Parameters
- Fs 33 Hz
- Re 3.6 Ω
- Qes 0.37
- Qms 7.7
- Qts 0.36
- Vas 278.0 dm3 (9.7 ft3)
- Sd 1680.0 cm2 (260.4 in2)
- η₀ 2.6 %
- Xmax 14.0 mm
- Xvar 15.0 mm
- Mms 335 g
- Bl 24.8 Txm
- Le 1.7 mH
- EBP 89 Hz
Mounting And Shipping Info
- Overall diameter 547 mm (21.5 in)
- Bolt circle diameter 527 mm (20.7 in)
- Baffle cutout diameter 508.0 mm (20.0 in)
- Depth 250 mm (9.9 in)
- Flange and gasket thickness 14 mm (0.53 in)
- Air volume occupied by driver 15.0 dm3 (0.53 ft3)
- Net weight 14.0 kg (30.8 lb)
- Shipping units 1
- Shipping weight 16.4 kg (36.1 lb)
- Shipping box 590x590x300 mm (23.1x23.1x11.8 in)
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B&C 21SW115 - 21" 1700W 4 Ohm Loudspeaker PDF data sheet (350 kb)
View B & C website for more information for B & C 21SW115 SEARCH results for other drivers with similar T-S Parameters to B&C 21SW115 - 21" 1700W 4 Ohm Loudspeaker
Our database has the following results for compatibility of this product with common speakers and components.
FBT Mitus 121S 21SW115 | Woofer | Original
FBT Mitus 121S 21SW115 | Woofer | Original
Our database of parts includes a wide range of products, and in many cases offers cost effective alternatives for repair. Alternatives are loosely grouped into three types:
Original - Usually an exact match to the original product, and just the 'standard' part from the factory which gets rebadged by manufacturer with their own brand and part number. Occasionally, there are subtle tweaks made from the standard part, but its virtually impossible for us to determine this. If we have listed the part as Original, it means we are confident the performance is the same.Aftermarket - Aftermarket parts often become available from factories in the far east once the original part is no longer manufactured. They are intended to be a close match, and provide a cost-effective alternative.
Equivalent - These are alternative options, which provide very similar performance, but are not the same as the original. In some cases the performance may actually be improved. We have used both our own experience, and feedback from customers in generating list of alternatives. Alternatives like this are useful when the original part is no longer made, there is no aftermarket option, so the only choice is to upgrade with the nearest current equivalent product.