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B&C 21DS115-4 21" Professional Neodymium Subwoofer 4 Ohm

B&C Speakers
Part #294-6032

B&C 21DS115-4 21" Professional Neodymium Subwoofer 4 Ohm

B&C Speakers
Part #294-6032  
Model: 21DS115-4
B&C designed the 21DS115 21" high output subwoofer to produce more output and lower distortion than any other comparably priced driver. With high excursion, incredible efficiency, and excellent power handling, this driver has true earth shaking output capability.
Key Features
  • 99 dB efficiency to ensure high output even with modest amplification
  • Double silicone spider keeps excursion linear even beyond rated Xmax
  • Neodymium magnet allows a very high force factor without excess weight
  • 4.5" four layer CCA voice coil allows high power handling and Bl
  • Aluminum shorting ring help control the voice coil for lower distortion
Your Price: $789.27
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MSRP: $1,315.46
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Overview

B&C 21DS115-4 21" Professional Neodymium Subwoofer 4 Ohm

B&C's 21DS115 21" subwoofer is the next evolution in high output subwoofer design. Using a new, longer, four layer aluminum voice coil to produce more energy in the gap, higher sensitivity, lower distortion, and better overall performance. The 21DS115 features a 36 mm long, 4.5" diameter (116mm) copper clad aluminum wire voice coil. With a 1,700watt AES power rating, 99 dB sensitivity, and over 15 mm of linear excursion, this high energy subwoofer is a significant step forward from similar models in the B&C range, even approaching the performance of their 6" voice coil alternatives.

Product Details

BrandB&C Speakers
Model21DS115-4
Part Number294-6032
UPC848864050621
Unit of MeasureEach
Weight37.7

Product Specifications

Nominal Diameter21"
Bolt Circle Diameter20.7
Power Handling (RMS)1700 Watts
Power Handling (MAX)3400 Watts
Impedance4Ω
Frequency Response30 to 1,000Hz
Sensitivity99dB 2.83V/1m
Voice Coil Diameter4.5"

Thiele-Small Parameters

Resonant Frequency (Fs)30Hz
DC Resistance (Re)2.2Ω
Voice Coil Inductance (Le)2.4mH
Mechanical Q (Qms)11
Electromagnetic Q (Qes)0.2
Total Q (Qts)0.21
Compliance Equivalent Volume (Vas)9.68ft³
Mechanical Compliance of Suspension (Cms)0.068mm/N
BL Product (BL)29.23T·m
Diaphragm Mass Inc. Airload (Mms)412g
Maximum Linear Excursion (Xmax)15mm
Surface Area of Cone (Sd)1681cm²

Materials of Construction

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

Mounting Information

Overall Outside Diameter21.54"
Baffle Cutout Diameter20"
Depth10.04"
# Mounting Holes8

Parts Express Staff Recommended Enclosure Volume

Vented Volume6.5ft³
Vented F332.7Hz

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