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Super radiateur passif vraiment efficace
This review has been posted for DAYTON AUDIO DMA70-PR Aluminium Passive Radiator 34.5Hz Ø6.3cm Super radiateur passif vraiment efficace
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DAYTON AUDIO DMA70-PR Aluminium Passive Radiator 34.5Hz Ø6.3cm
The DMA70-PR of Dayton Audio is a passive radiator with a diameter of 6.3cm. 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 membrane and a rubber surround.
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Dayton Audio DMA70-PR
Aluminium Passive Radiator 34.5Hz Ø6.3cm
The DMA70-PR of Dayton Audio is a passive radiator with a diameter of 6.3cm. 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 membrane and a rubber surround. Visually identical to the Dayton Audio DMA range of wideband speakers, this DMA70-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.
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.
Technical characteristics
| Specifications | |
|---|---|
| Product type | Passive radiator |
| Speaker series | DMA |
| Nominal diameter | Ø6.3cm (2.5") |
| Resonant frequency(Fs) | 34.5Hz |
| Mechanical quality coefficient (Qms) | 3.86 |
| Compliance equivalent volume (Vas) | 0.046ft³ |
| Mechanical compliance of suspension (Cms) | 1.77mm/N |
| Diaphragm mass inc. airload (Mms) | 12g |
| Max linear excursion | 7mm |
| Maximum linear excursion (Sd) | 22.9cm² |
| Surface area of cone | Aluminium |
| Mounting informations | |
|---|---|
| Total external dimensions | 70 x 70mm |
| Cutout diameter | 64mm |
| Depth | 44mm |
| Number of fixation holes | 4 |
| Speaker Power (W RMS) | NC |
| Speaker Type | Passive Radiator |
| Impedance (Ω) | NC |
| Loudspeaker diameter (mm) | 63.0 |
| Diaphragm type | Aluminium |
| Efficiency / Sensitivity (dB) | N/A |
| Max Linear Excursion (Xmax) (mm) | 7.0 |
| Lowest frequency (Hz) | N/A |
| Highest frequency (Hz) | N/A |
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5/5
Date :
2020-10-25
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