PSS545HE-4 Vortex 21" Pro Subwoofer with 5" Voice Coil 4 Ohm

Quick Overview

Dayton Audio's PSS545HE-4 21" professional high output subwoofer is built to deliver incredibly deep bass, maximum SPL, and low distortion. Dubbed the Vortex, this massive driver is capable of moving an incredible amount of air with outstanding control and power. With a potent ferrite motor, 5" voice coil, rigid paper cone, dual spiders, rugged cast aluminum frame, 97.7dB sensitivity, and 42 mm of peak-to-peak excursion this driver will provide all of the low frequency output you could ever need. Prepare to be blown away by the Vortex.

Product Highlights

  • Massive 5" inside/outside wound voice coil for extreme power handling and incredible control
  • 21 mm of excursion with minimal loss of motor force allows incredible displacement capability
  • True dual spider design with ample spacing to keep excursion linear with low distortion
  • Reinforced treated paper cone keeps unwanted resonances under control
  • Aluminum shorting sleeve for minimal distortion when driven to extreme levels
  • Unique over-excursion protection system warns you just before catastrophic failure

Product Manuals / Spec Sheets / Downloads

Dayton Audio PSS545HE-4 Specification Sheet
Dayton Audio PS545HE-5 Data Files

Buying Options

You need to move a lot of air for high SPL bass response, and Dayton Audio's PSS545HE-4 21" Vortex professional subwoofer surpasses most high efficiency subwoofers in the industry. This massive driver is capable of 21 mm of excursion in each direction (@ 70% BL, Klippel verified) giving it 7 liters of displacement with each stroke. Displacement isn't all you need for maximum output; power handling and efficiency are also necessary. Capable of handling 2,000 watts RMS and with over 97dB sensitivity, the PSS545HE-4 has what it takes to deliver deep bass at ground shaking output levels. Beware of the power of the Vortex.

Over-Excursion Protection system avoids catastrophic failure

Although the Dayton Audio PSS545HE-4 21" is designed to produce incredibly low frequencies at phenomenal output for extended periods of time, we understand that subwoofers are frequently driven up to and beyond their published limits and we expect that this driver will be no exception. All too often subwoofers fail prematurely due to being over driven, so to minimize this from happening and to extend its life Dayton Audio implemented an OEP (Over-Excursion Protection) system which audibly alerts the user just before catastrophic failure occurs. The Dayton Audio's PSS545HE-4 is purposely built to provide years of the powerful bass you crave.

It's all about the motor

Powering the Dayton Audio PSS545HE-4 is an advanced high energy double stacked ferrite motor assembly. Unlike neodymium magnets, the powerful ferrite magnets are capable of delivering a constant motor force even when exposed to high heat to keep power compression at a minimum. Its 5" inside/outside wound voice coil uses a fiberglass former that can withstand extreme temperatures to handle up to 2,000 watts RMS without issue. A large pole piece vent, 6 peripheral gap vents, and numerous vents between the frame and top plate allow plenty of air to move across the voice coil, further reducing power compression caused by increased resistance due to heat. To control inductance at high output and minimize distortion, the pole piece also includes a large aluminum shorting sleeve. All of this gives the PSS545HE-4 the ability to deliver predictable and consistent low frequency output even when driven to extreme SPL levels for extended periods.

Rugged, durable, and built to handle abuse

Dayton Audio built the PSS545HE-4 to take the use and abuse of the harsh professional sound environment. The naturally damped treated paper cone is optimized and reinforced to handle the stress of exceptionally high excursion while maintaining its shape. To keep the cone under control, the PSS545HE-4 uses dual large diameter spiders with ample spacing to provide extreme linearity. A deep quadruple-roll accordion surround allows for linear excursion, even when driven to its limits and beyond. Holding everything together is a rugged cast aluminum frame that that will not restrict airflow and includes integrated push button wire terminals for a reliable and secure electrical connection. The PSS545HE-4 has been built to deliver years of worry-free performance.

The Vortex is sure to blow you away

If you're looking for one of the highest bass output drivers in the industry, the Dayton Audio PSS545HE-4 is an unbeatable value. This versatile driver is a great choice for vented designs, back loaded horns, and even tapped horns. With a 4 ohm voice coil this driver is also perfect for use in dual and quad driver systems for the ultimate in output capability.


Sealed Volume 1.5 ft.³
Sealed F3 77 Hz
Vented Volume 6 ft.³
Vented F3 35 Hz
* Enclosure volume/F3s based on BassBox "optimum" calculations

Speaker Series Pro Audio Series
Model Number PSS545HE-4
Color Black
Unit of Measure Each
UPC 848791006500
Warranty - Parts 5 Years
Warranty - Labor 5 Years
Product Shipping Weight (lbs.) 105
Speaker Type Woofer
Nominal Diameter 21"
Power Handling (RMS) 2,000 watts
Power Handling (max) 4,000 watts
Continuous Program Power --
Impedance 4 ohms
Sensitivity 97.7 dB @ 2.83V/1m
Frequency Response 18 - 600 Hz
Voice Coil Diameter 127 mm
Magnet Weight
DC Resistance (Re) 3.8 ohms
Voice Coil Inductance (Le) 8.2 mH
Resonant Frequency (Fs) 28.8 Hz
Mechanical Q (Qms) 7.28
Electromagnetic Q (Qes) 0.28
Total Q (Qts) 0.27
Diaphragm Mass Inc. Airload (Mms) 511.2g
Moving Mass Of Diaphragm (Mmd) --
Mechanical Compliance of Suspension (Cms) 0.06 mm/N
Surface Area Of Cone (Sd) 1,590 cm²
Volume of Displacement (Vd) 3,338 cm³
BL Product (BL) 35.5 Tm
Compliance Equivalent Volume (Vas) 212.2 liters
Maximum Linear Excursion (Xmax) 21 mm
Drivers Mechanical Losses (Rms) --
Cone / Diaphragm Material Treated Paper Cone
Entry / Exit Diameter --
Surround Material Cloth
Voice Coil Wire Material Copper
Voice Coil Former Fiberglass
Basket/Frame Material Cast Aluminum
Magnet Material Ferrite
Overall Outside Diameter 544.83 mm
Overall Depth 258.57 mm
Baffle Cutout Diameter 495.3 mm
# Mounting Holes 8
Mounting Hole Diameter --
Bolt Circle Diameter --
Product Weight --