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Dayton Audio DMA70-PR 2-1/2" DMA Series Passive Radiator

Dayton Audio
Part #295-594

Dayton Audio DMA70-PR 2-1/2" DMA Series Passive Radiator

Dayton Audio
Part #295-594  
Model: DMA70-PR
Dayton Audio's DMA70-PR 2-1/2" 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.
Key Features
  • 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
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MSRP: $10.99
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Overview

Dayton Audio DMA70-PR 2-1/2" DMA Series Passive Radiator

The DMA70-PR 2-1/2" 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 Audio's full-range DMA series drivers, the DMA70-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 DMA70-PR introduces a new range of possibilities.

Specifications: • Fs: 34.5 Hz • Vas: 0.046 ft³ (1.32 liters) • Qms: 3.86 • Cms: 1.77 mm/N • Mms: 12.0 g • Rms: 1.49 kg/s • Sd: 22.9 cm² • Xmech: 7 mm • Dimensions: Overall diameter: 2.75" x 2.75", Cutout diameter: 2.52", Depth: 1.73".

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

BrandDayton Audio
ModelDMA70-PR
Part Number295-594
UPC848791005626
Unit of MeasureEach
Weight0.2

Product Specifications

Nominal Diameter2-1/2"
Bolt Circle Diameter3.25

Thiele-Small Parameters

Resonant Frequency (Fs)34.5Hz
Mechanical Q (Qms)3.86
Compliance Equivalent Volume (Vas)0.046ft³
Mechanical Compliance of Suspension (Cms)1.77mm/N
Diaphragm Mass Inc. Airload (Mms)12g
Maximum Linear Excursion (Xmax)7mm
Surface Area of Cone (Sd)22.9cm²

Materials of Construction

Cone MaterialAluminum

Mounting Information

Overall Outside Diameter2.75" x 2.75"
Baffle Cutout Diameter2.52"
Depth1.73"
# Mounting Holes4

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