Dayton Audio's 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.
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 Details
Dayton Audio DMA105-PR 4" DMA Series Passive Radiator
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 Audio's 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: 7.80
•
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: 3.86", 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
Product Specifications
Nominal Diameter - 4"
Thiele-Small Parameters
Resonant Frequency (Fs) - 37.9 Hz
Mechanical Q (Qms) - 7.80
Compliance Equivalent Volume (Vas) - 0.089 ft.³
Mechanical Compliance of Suspension (Cms) - 0.60 mm/N
Diaphragm Mass Inc. Airload (Mms) - 29.3g
Maximum Linear Excursion (Xmax) - 9 mm
Surface Area of Cone (Sd) - 54.1 cm²
Materials of Construction
Basket / Frame Material - Polymer
Mounting Information
Overall Outside Diameter - 4.1" x 4.1"
Baffle Cutout Diameter - 3.86"
Depth - 2.17"
Bolt Circle Diameter - 5"
# Mounting Holes - 4