PSS555-8 21" Pro Subwoofer with 4.5” Voice Coil 8 Ohm

Quick Overview

For high output low frequency response with maximum output, Dayton Audio's PSS555-8 21" professional subwoofer is an unbeatable value. This massive driver is capable of incredible displacement with excellent efficiency and power handling. Featuring a 4-1/2" voice coil, massive ferrite motor, extensive venting, rigid treated paper cone, and rugged cast aluminum frame the PSS555-8 is capable of incredible low frequency response at breathtaking SPL levels.

Product Highlights

  • Large 4-1/2" inside/outside wound voice coil to handle 1,000 watts RMS for extended sessions
  • Massive ferrite motor assembly with extensive venting for minimal power compression
  • Copper shorting ring keep inductance under control for incredibly low distortion
  • Push button terminals make wire connection easy and extremely secure
  • Rigid cast aluminum frame to withstand the use and abuse of the professional sound environment
  • Capable of 22 mm peak-to-peak excursion with only a 30% loss in BL

Product Manuals / Spec Sheets / Downloads

Dayton Audio PSS555-8 Specification Sheet
Dayton Audio PS555-8 Data Files

Buying Options

You need to move a lot of air for high SPL bass response, and Dayton Audio's PSS555-8 21" professional subwoofer was built to move as much air as possible for the best value imaginable. This massive driver is capable of 11 mm of excursion in each direction (@ 70% BL, Klippel verified) for nearly 4 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 1,000 watts RMS and with over 96 dB sensitivity, the PSS555-8 has what it takes to deliver. This driver is not just about output capability, the advanced and powerful motor is designed to produce incredibly low distortion levels even when driven to its limit for extended periods. Dayton Audio's PSS555-8 is sure to deliver the bass output you crave.

Powering the PSS555-8 is an advanced high energy ferrite motor assembly. Unlike neodymium magnets, the powerful ferrite magnet is capable of delivering a constant motor force even when exposed to high heat which helps keep power compression at a minimum. Its 4-1/2" inside/outside wound voice uses a fiberglass former that can take enough heat to handle up to 1,000 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 to dissipate excessive heat, further reducing power compression caused by increased resistance due to heat. To control inductance and keep distortion to a minimum, the pole piece also includes a large copper shorting cap. All of this gives the PSS555-8 the ability to deliver predictable and consistent low frequency output even when driven to extreme SPL levels for extended periods.

Dayton Audio built the PSS555-8 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 high excursion while maintaining its shape. To keep the cone under control, the PSS555-8 uses a large diameter spider and deep triple-roll accordion surround allowing 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 PSS555-8 has been built to deliver years of worry free performance.

For high output bass response Dayton Audio's PSS555-8 is an unbeatable value. This versatile driver is a great choice for vented designs, back loaded horns, and even tapped horns. With an 8 ohm voice coil this driver is also perfect for use in dual and quad driver systems for the ultimate in output capability.


Sealed Volume 2.5 ft.³
Sealed F3 74 Hz
Vented Volume 5.8 ft.³
Vented F3 31 Hz
* Enclosure volume/F3s based on BassBox "optimum" calculations

Speaker Series Pro Audio Series
Model Number PSS555-8
Color Black
Unit of Measure Each
UPC 848791006494
Warranty - Parts 5 Years
Warranty - Labor 5 Years
Product Shipping Weight (lbs.) 60
Speaker Type Woofer
Nominal Diameter 21"
Power Handling (RMS) 1,000 watts
Power Handling (max) 2,000 watts
Continuous Program Power --
Impedance 8 ohms
Sensitivity 96.3 dB @ 2.83V/1m
Frequency Response 27 - 2,500 Hz
Voice Coil Diameter 114.3 mm
Magnet Weight 200 oz.
DC Resistance (Re) 5.4 ohms
Voice Coil Inductance (Le) 1.8 mH
Resonant Frequency (Fs) 27.6 Hz
Mechanical Q (Qms) 10.7
Electromagnetic Q (Qes) 0.34
Total Q (Qts) 0.33
Diaphragm Mass Inc. Airload (Mms) 316.0g
Moving Mass Of Diaphragm (Mmd) --
Mechanical Compliance of Suspension (Cms) 0.11 mm/N
Surface Area Of Cone (Sd) 1735 cm²
Volume of Displacement (Vd) 1909 cm³
BL Product (BL) 29.7 Tm
Compliance Equivalent Volume (Vas) 444 liters
Maximum Linear Excursion (Xmax) 11 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 549.91 mm
Overall Depth 254 mm
Baffle Cutout Diameter 510.54 mm
# Mounting Holes 8
Mounting Hole Diameter --
Bolt Circle Diameter --
Product Weight --