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CLEARANCE PRV Audio 21SW4000 21" High Power PA Subwoofer Speaker 8 Ohm

PRV AudioPart # 294-2756
Model: 21SW4000
Choose the PRV Audio 21SW4000 21" subwoofer for extreme low frequency SPL. Forced Air Cooling Technology (FACT) forces air across the 6" voice coil for high power handling. 14 mm of Xmax is kept geometrically linear by a specially designed suspension system.

Key Features

  • FACT voice coil cooling system for high power handling
  • 14 mm of Xmax for extremely low frequency reproduction
  • Class leading performance at nearly half the price of the competition
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Overview

PRV Audio 21SW4000 21" High Power PA Subwoofer Speaker 8 Ohm

PRV Audio's 21SW4000 21" subwoofer is designed to compete (and in most cases beat) against subwoofers that cost almost twice its price. The thick, durable paper cone was developed and tested to be precisely stiff enough to withstand intense use without sacrificing smoothness, accuracy, and sensitivity. 

From the extended woven M-Roll surround, to the specially-designed dual spider suspension that is assembled with a high-temp resin, not a single speaker component was overlooked in the design process. 

A class-leading 6" diameter voice coil is mounted onto a fiberglass former to provide the foundation that allows for 2,000 watts of RMS power handling (4,000 watts program power) and is kept cool through the unique, built-in FACT (Forced Air Cooling Technology) system that draws air from above and below the gap for a complete cooling cycle that works with the subwoofer's natural movement. 

Ensuring that this 21" driver will stand the test of time is a cast-aluminum frame, while the magnet assembly is attached using a sturdy steel plate with reinforcement screws. The 21SW4000 truly stands on its own merit as a subwoofer you can trust for high output low frequency reproduction and durability.

Product Details

BrandPRV Audio
Model21SW4000
Part Number294-2756
UPC799928733526
Unit of MeasureEach
Weight74

Product Specifications

Nominal Diameter21"
Power Handling (RMS)2000 Watts
Power Handling (MAX)4000 Watts
Impedance8Ω
Frequency Response33 to 1,000Hz
Sensitivity98dB 2.83V/1m
Voice Coil Diameter6"

Thiele-Small Parameters

Resonant Frequency (Fs)32.3Hz
DC Resistance (Re)4.4Ω
Mechanical Q (Qms)13.92
Electromagnetic Q (Qes)0.28
Total Q (Qts)0.27
Compliance Equivalent Volume (Vas)7.33ft³
BL Product (BL)27.33T·m
Maximum Linear Excursion (Xmax)14mm
Surface Area of Cone (Sd)1661cm²

Materials of Construction

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

Mounting Information

Overall Outside Diameter21.4"
Baffle Cutout Diameter19.3"
Depth8"
# Mounting Holes8

Parts Express Staff Recommended Enclosure Volume

Vented Volume6ft³
Vented F339Hz

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