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B&C 21SW152-4 21" Neodymium Subwoofer 4 Ohm

B&C Speakers
Part #294-689

B&C 21SW152-4 21" Neodymium Subwoofer 4 Ohm

B&C Speakers
Part #294-689  
Model: 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
  • 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
Your Price: $907.26
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MSRP: $1,512.11
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Overview

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

BrandB&C Speakers
Model21SW152-4
Part Number294-689
UPC844632086144
Unit of MeasureEach
Weight48.45

Product Specifications

Nominal Diameter21"
Bolt Circle Diameter20.7
Power Handling (RMS)2000 Watts
Power Handling (MAX)4000 Watts
Impedance4Ω
Frequency Response30 to 1,000Hz
Sensitivity96dB 2.83V/1m
Voice Coil Diameter6"

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
Diaphragm Mass Inc. Airload (Mms)460g
Maximum Linear Excursion (Xmax)15mm
Surface Area of Cone (Sd)1680cm²

Materials of Construction

Cone MaterialTreated Paper
Surround MaterialCloth
Voice Coil Wire MaterialCopper
Voice Coil FormerFiberglass
Basket / Frame MaterialCast Aluminum
Magnet MaterialNeodymium

Mounting Information

Overall Outside Diameter21.5"
Baffle Cutout Diameter20"
Depth10.3"
# Mounting Holes8

Parts Express Staff Recommended Enclosure Volume

Sealed Volume3.13ft³
Sealed F390.9Hz
Vented Volume7ft³
Vented F334.6Hz

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