5 out of 5
B&C 21SW152-4 21" Neodymium Subwoofer 4 Ohm
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Pricing Note
Product Description
Manufacturer Part Number: 21SW152-4
B&C's 21SW152 21" subwoofer driver features a massive 260 square inches of diaphragm surface area-nearly 40% more than an 18" driver and equal to double the Sd of a typical 15".
Key Features:
B&C 21SW152-4 21" Neodymium Subwoofer 4 Ohm
The B&C Speakers 21SW152 21" subwoofer's 6" diameter voice coil with a 1" copper winding length provides great Xmax (15 mm) and impressive power handling (2,000 watts RMS). Despite the driver's size, a high-strength neodymium ring magnet keeps overall weight as low as possible. The 21SW152 will deliver nearly unmatchable low frequency output when loaded into vented or horn loaded enclosures. Perfect for high output concert and nightclub applications.
B&C's 21SW152 21" subwoofer driver features a massive 260 square inches of diaphragm surface area-nearly 40% more than an 18" driver and equal to double the Sd of a typical 15".
Key Features:
- 4,000 watt continuous program power capacity
- 6" diameter, 1" long split winding copper voice coil wound on fiberglass former
- 15 mm Xmax, 60 mm peak-to-peak excursion before damage
- Neodymium ring magnet allows a very high force factor and linear excursion
- Ventilated voice coil gap for reduced power compression
- Aluminum demodulating ring decreases distortion
- Double silicone spider with optimized compliance
B&C 21SW152-4 21" Neodymium Subwoofer 4 Ohm
The B&C Speakers 21SW152 21" subwoofer's 6" diameter voice coil with a 1" copper winding length provides great Xmax (15 mm) and impressive power handling (2,000 watts RMS). Despite the driver's size, a high-strength neodymium ring magnet keeps overall weight as low as possible. The 21SW152 will deliver nearly unmatchable low frequency output when loaded into vented or horn loaded enclosures. Perfect for high output concert and nightclub applications.
Product Details | |
|---|---|
| Brand | B&C Speakers |
| Model | 21SW152-4 |
| Part Number | 294-689 |
| UPC | 844632086144 |
| Unit of Measure | Each |
| Weight | 48.45 |
Product Specifications | |
|---|---|
| Nominal Diameter | 21" |
| Bolt Circle Diameter | 20.7 |
| Moving Mass Of Diaphragm (Mmd) | 460 |
| Power Handling (RMS) | 2000 Watts |
| Power Handling (MAX) | 4000 Watts |
| Impedance | 4Ω |
| Frequency Response | 30 to 1,000Hz |
| Sensitivity | 96dB 2.83V/1m |
| Voice Coil Diameter | 6" |
Thiele-Small Parameters | |
|---|---|
| Resonant Frequency (Fs) | 32Hz |
| DC Resistance (Re) | 3.4Ω |
| Voice Coil Inductance (Le) | 1.5mH |
| Mechanical Q (Qms) | 7 |
| Electromagnetic Q (Qes) | 0.31 |
| Total Q (Qts) | 0.3 |
| Compliance Equivalent Volume (Vas) | 7ft³ |
| BL Product (BL) | 32.5T·m |
| Maximum Linear Excursion (Xmax) | 15mm |
| Surface Area of Cone (Sd) | 1680cm² |
Materials of Construction | |
|---|---|
| Cone Material | Treated Paper |
| Surround Material | Cloth |
| Voice Coil Wire Material | Copper |
| Voice Coil Former | Fiberglass |
| Basket / Frame Material | Cast Aluminum |
| Magnet Material | Neodymium |
Mounting Information | |
|---|---|
| Overall Outside Diameter | 21.5" |
| Baffle Cutout Diameter | 20" |
| Depth | 10.3" |
| # Mounting Holes | 8 |
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion) | |
|---|---|
| Sealed Volume | 0.93ft³ |
| Sealed F3 | 93Hz |
| Vented Volume | 2.22ft³ |
| Vented F3 | 58Hz |
Attention CA Residents: Prop 65 Warning
WARNING:
This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov.
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Customer Reviews
By G.L.Robotics
Date: January 23, 2017
Currently I purchased a pair of these amazing subs that produce some very very loud sub frequencies with no distortion. I've built some 7.5 cubic foot boxes tuned at 30 Hz powered by Behringer NU12000DSP amplifier crossed over at 40 Hz. The rest of the system takes care of the rest... 8-1534;woofers.
Rating: 
[5 of 5 Stars!]
[5 of 5 Stars!]
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