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.
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
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".
Product Specifications
Nominal Diameter - 2-1/2"
Thiele-Small Parameters
Resonant Frequency (Fs) - 34.5 Hz
Mechanical Q (Qms) - 3.86
Compliance Equivalent Volume (Vas) - 0.046 ft.³
Mechanical Compliance of Suspension (Cms) - 1.77 mm/N
Diaphragm Mass Inc. Airload (Mms) - 12.0g
Maximum Linear Excursion (Xmax) - 7 mm
Surface Area of Cone (Sd) - 22.9 cm²
Materials of Construction
Cone Material - Aluminum
Mounting Information
Overall Outside Diameter - 2.75" x 2.75"
Baffle Cutout Diameter - 2.52"
Depth - 1.73"
Bolt Circle Diameter - 3.25"
# Mounting Holes - 4