Dayton Audio DMA45-PR DMA Series Passive Radiator

Price: 517.00INR
Ex Tax: 517.00INR
Brand:  Dayton Audio
Product Code:  DMA45-PR
Availability:  In Stock
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Dayton Audio DMA45-PR 1-1/2" DMA Series Passive Radiator


Dayton Audios DMA45-PR 1-1/2" aluminum cone passive radiator allows you to tune small enclosures lower than using conventional ports. Matching the DMA45 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 using conventional ports
  • Rear mounted threaded post allows easy mass adjustment for custom tuning
  • DIY friendly, oversized mounting flange makes installation simple

Product Description

The DMA45-PR 1-1/2" 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 DMA45-PR can be used with any mini-speaker. 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 DMA45-PR introduces a new range of possibilities.


  • Fs                     :           60 Hz
  • Vas                   :           0.0092 cu. ft. (0.26 liters)
  • Qms                 :           2.75
  • Cms                 :           2.12 mm/N
  • Mms                 :           2.8 g
  • Rms                  :           0.38 kg/s
  • Sd                     :           8.6 sq. cm.
  • Xmech              :           5 mm


  • Overall diameter: 1.8" x 1.8", Cutout diameter: 1.56", Depth: 1.35".

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

Product Details

Model Number




Unit of Measure




Product Shipping Weight (lbs.)


Speaker Type

Passive Radiator

Nominal Diameter


Power Handling (max)


Continuous Program Power




Frequency Response


Voice Coil Diameter


Magnet Weight


DC Resistance (Re)


Voice Coil Inductance (Le)


Resonant Frequency (Fs)

60 Hz

Mechanical Q (Qms)


Electromagnetic Q (Qes)


Total Q (Qts)


Diaphragm Mass Inc. Airload (Mms)

2.8 g

Moving Mass Of Diaphragm (Mmd)


Mechanical Compliance of Suspension (Cms)

2.12 mm/N

Surface Area Of Cone (Sd)

8.6 cm²

Volume of Displacement (Vd)

4.3 cm³

BL Product (BL)


Compliance Equivalent Volume (Vas)

0.0092 ft³

Maximum Linear Excursion (Xmax)

5 mm

Drivers Mechanical Losses (Rms)

0.38 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



Product Specifications

Nominal Diameter                                   :           2-1/2"

Bolt Circle Diameter                               :           2

Moving Mass Of Diaphragm (Mmd)      :           2.8

Materials of Construction

Cone Material                           :           Aluminum

Surround Material                    :           Rubber

Basket / Frame Material           :           Polymer

Mounting Information

Overall Outside Diameter         :           1.8" x 1.8"

Baffle Cutout Diameter             :           1.56"

Depth               `                          :           1.35"


Product Manuals / Spec Sheets / Downloads

Dayton Audio DMA45-PR Specification Sheet Click here


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