DAYTON AUDIO DMA90-PR Aluminium Passive Radiator 38Hz Ø8.9cm

DAYTON AUDIO DMA90-PR Aluminium Passive Radiator 38Hz Ø8.9cm
The DMA90-PR of Dayton Audio is an 8.9cm diameter passive radiator. This is an excellent solution for a bass boost in smaller speakers. This small passive radiator has everything you would expect from larger models, including an adjustable mass, an Aluminium cone and a rubber surround.

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Shipping date: 01-02-2022.

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Dayton Audio DMA90-PR

Aluminium Passive Radiator 38Hz Ø8.9cm

Dayton Audio DMA90-PR Radiateur Passif Aluminium 38Hz Ø8.9cm

The DMA90-PR of Dayton Audio is an 8.9cm diameter passive radiator. This is an excellent solution for a bass boost in smaller speakers. This small passive radiator has everything you would expect from larger models, including an adjustable mass, an Aluminium cone and a rubber surround. Visually identical to the Dayton Audio DMA range of wideband speakers, this DMA90-PR can also be used with any other small speaker that requires reinforcement in low frequencies. The included threaded rod and butterfly nut at the rear of the diaphragm make it easy to add mass to adjust the passive radiator to your project.

Dayton Audio DMA90-PR Radiateur Passif Aluminium 38Hz Ø8.9cm

In general, a passive radiator must have at least twice the air displacement (Vd) of the system's active loudspeaker/subwoofer. To calculate the air displacement: Vd = Sd x Xmax

Operation of a passive radiator

The passive radiator (or passive loudspeaker) is integrated into a box with an active loudspeaker. This passive radiator, while at first glance it may look like a "classic" loudspeaker, does not actually have any engine parts. Thus, there will be no coil, magnet or power supply in its design. Similarly, it will not be electrically connected to a power amplifier.

To diffuse sound, the passive radiator will use the air pressures and depressions induced by the active loudspeaker in the body to vibrate its membrane and produce a sound, thus providing deep bass. Its resonance frequency is determined by its mass and the air contained in the enclosure. It will therefore be possible to vary its resonance frequency on many models and tune it to the speaker by adding mass.

Fonctionnement d'un radiateur passif

Technical characteristics

Specifications
Product typePassive radiator
Speaker seriesDMA
Nominal diameterØ8.9cm (3.5")
Resonant frequency (Fs)38Hz
Mechanical quality coefficient (Qms)5.01
Compliance equivalent volume (Vas)0.082ft³
Mechanical compliance of suspension (Cms)1.1mm/N
Diaphragm mass inc. airload (Mms)15.9g
Max linear excursion (Xmax)8mm
Surface area of cone (Sd)38.5cm²
Frame materialPolymer
Cone materialAluminium
Mounting informations
Total external dimensions89.9 x 89.9mm
Cutout diameter83.6mm
Depth47mm
Number of fixation holes4
 
Data sheet
Speaker TypePassive Radiator
Impedance (Ω)NC
Loudspeaker diameter (mm)89.0
Diaphragm typeAluminium
Efficiency / Sensitivity (dB)N/A
Max Linear Excursion (Xmax) (mm)8.0
Lowest frequency (Hz)N/A
Highest frequency (Hz)N/A
 
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DAYTON AUDIO DMA90-PR Aluminium Passive Radiator 38Hz Ø8.9cm
The DMA90-PR of Dayton Audio is an 8.9cm diameter passive radiator. This is an excellent solution for a bass boost in smaller speakers. This small...

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