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CLEARANCE B&C 21SW115-4 21" Professional Neodymium Subwoofer 4 Ohm

B&C Speakers
Part #294-6011

CLEARANCE B&C 21SW115-4 21" Professional Neodymium Subwoofer 4 Ohm

B&C Speakers
Part #294-6011  
Model: 21SW115-4
B&C's 21SW115-4 21" pro subwoofer speaker boasts an oversized 4.5" voice coil, neodymium motor, 1,700 watts RMS power handling capacity, and 14 mm Xmax (60 mm peak-to-peak excursion before damage).
Key Features
  • Lightweight but powerful FEA-optimized neodymium magnet
  • Extremely high BL factor and Xmax for outstanding LF output
  • 14 mm Xmax, 60 mm peak-to-peak excursion before damage
  • 4.5" split winding copper voice coil on fiberglass former
  • Ventilated voice coil gap reduces power compression
  • Aluminum demodulation ring on pole piece reduces distortion
  • Double silicone spider

Overview

B&C 21SW115-4 21" Professional Neodymium Subwoofer 4 Ohm

The B&C 21SW115-4 is an advanced, lightweight subwoofer driver featuring 1,700 watts RMS power handling, a 1.34" long/4.5" diameter copper voice coil with very high thermal capability, and a ventilated neodymium magnet assembly that provides low power compression. An aluminum demodulation ring fitted to the 21SW115-4's pole piece reduces distortion.

Product Details

BrandB&C Speakers
Model21SW115-4
Part Number294-6011
UPC848864009872
Unit of MeasureEach
Weight36.1

Product Specifications

Nominal Diameter21"
Bolt Circle Diameter20.7
Power Handling (RMS)1700 Watts
Power Handling (MAX)3400 Watts
Impedance
Frequency Response33 to 1,000Hz
Sensitivity97dB 2.83V/1m
Voice Coil Diameter4.5"

Thiele-Small Parameters

Resonant Frequency (Fs)33Hz
DC Resistance (Re)3.6Ω
Voice Coil Inductance (Le)1.7mH
Mechanical Q (Qms)7.7
Electromagnetic Q (Qes)0.37
Total Q (Qts)0.36
Compliance Equivalent Volume (Vas)9.7ft³
BL Product (BL)24.87T·m
Maximum Linear Excursion (Xmax)14mm

Materials of Construction

Cone MaterialCoated 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"
Depth9.9"
# Mounting Holes8

Parts Express Staff Recommended Enclosure Volume

Sealed Volume2.5ft³
Sealed F373.13Hz
Vented Volume6.7ft³
Vented F342.25Hz

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