DMA105-PR 4" DMA Series Passive Radiator

Quick Overview

Dayton Audios DMA105-PR 4" aluminum cone passive radiator allows you to tune small enclosures lower than possible using conventional ports. Matching the DMA series of drivers drivers perfectly, this passive radiator is perfect for use in ultra-small designs like smart speakers, sound bars, and portable Bluetooth speakers.

Product Highlights

  • Perfect match for the Dayton Audio DMA series drivers
  • Allows tuning small enclosures lower than possible using conventional ports
  • Rear mounted threaded post allows easy mass adjustment for custom tuning
  • DIY friendly, oversized mounting flange makes installation simple

Product Manuals / Spec Sheets / Downloads

Dayton Audio DMA105-PR Specification Sheet

Buying Options

The DMA105-PR 4" passive radiator from Dayton Audio is the perfect option for achieving low tuning frequencies from the smallest enclosure designs. This incredibly small passive radiator has all the features you would expect lager units including adjustable mass, aluminum cone, and rubber surround. Visually identical to Dayton Audios full-range DMA series drivers, the DMA105-PR can also be used with any small driver that requires a low tuning frequency. The threaded rod and included wing nut on the back of the cone makes it easy to add mass to tune the radiator as needed for your projects. Whether you are building a smart speaker, sound bar, or portable Bluetooth speaker, the Dayton Audio DMA105-PR introduces a new range of possibilities.

Specifications: • Fs: 37.9 Hz • Vas: 0.089 ft³ (2.51 liters) • Qms: 7.8 • Cms: 0.60 mm/N • Mms: 29.3 g • Rms: 0.89 kg/s • Sd: 54.1 cm² • Xmech: 9 mm • Dimensions: Overall diameter: 4.1" x 4.1", Cutout diameter: 3.77", Depth: 2.17".

Tip: As a general rule, the passive radiator(s) should have at least double the displacement of air (Vd) as the active woofer(s)/subwoofer(s) in the system.
To calculate Vd: Sd x Xmax = Vd

Model Number DMA105-PR
Color Black
Unit of Measure Each
UPC 848791005657
Warranty - Parts 5 Years
Warranty - Labor 5 Years
Product Shipping Weight (lbs.) 0.35
Speaker Type Passive Radiator
Nominal Diameter 4"
Power Handling (max) --
Continuous Program Power --
Sensitivity --
Frequency Response --
Voice Coil Diameter --
Magnet Weight --
DC Resistance (Re) --
Voice Coil Inductance (Le) --
Resonant Frequency (Fs) 37.9 Hz
Mechanical Q (Qms) 7.8
Electromagnetic Q (Qes) --
Total Q (Qts) --
Diaphragm Mass Inc. Airload (Mms) 29.3 g
Moving Mass Of Diaphragm (Mmd) --
Mechanical Compliance of Suspension (Cms) 0.60 mm/N
Surface Area Of Cone (Sd) 54.1 cm²
Volume of Displacement (Vd) 48.7 cm³
BL Product (BL) --
Compliance Equivalent Volume (Vas) 2.5 liters
Maximum Linear Excursion (Xmax) 9 mm
Drivers Mechanical Losses (Rms) 0.90 kg/s
Entry / Exit Diameter --
Surround Material --
Voice Coil Wire Material --
Voice Coil Former --
Basket/Frame Material --
Magnet Material --
Overall Outside Diameter --
Overall Depth --
Baffle Cutout Diameter --
Mounting Hole Diameter --
Bolt Circle Diameter --
Product Weight --