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21" high efficiency Neodymium subwoofer.
This next evolution subwoofer uses a new, longer, four layer aluminum voice coil. The result is more energy in the gap, higher sensitivity, lower distortion and better overall performance. The 21DS115 features a 36 mm long, 4.5 inch diameter (116mm) Copper Clad Aluminum Wire voice coil. With a 1700watt AES power rating, 99 dB sensitivity, and over 16.5mm of Xvar, this high energy subwoofer is a significant step forward from similar models in the B&C range, even approaching the performance of our 6” voice coil alternatives.
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SPECIFICATIONS Nominal Diameter: Nominal Impedance: Nominal Power: Freq. Response: Sensitivity: Voice Coil Diameter: |
21", 530mm 4 ohms 1700 W rms, 3400 W program 30 Hz-1.0 kHz 99 db 1w/1m 4.5", 116mm |
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MOUNTING INFORMATION Overall Diameter: Baffle Hole Dia: Mounting BCD: Depth: Flange & Gasket Thickness: |
21.54", 547mm 20.0", 508mm 20.7", 527mm 10.04", 255mm 0.51", 13mm |
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T/S PARAMETERS Fs: Re: Le: Qms: Qes: Qts: Vas: Xmax: |
30.0 Hz 2.2 ohms 2.4mH 11.0 0.2 0.21 274 L, 9.68 cuft 15mm |
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CONSTRUCTION -Cast basket -Neodymium magnet with vented voice coil Full Product Specs From Manufacturer's Website 
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