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Comparison Alphard Magnum M15D4 vs Alphard Magnum M15D2

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Alphard Magnum M15D4
Alphard Magnum M15D2
Alphard Magnum M15D4Alphard Magnum M15D2
from 2 500 ₴
Outdated Product
from 2 500 ₴
Outdated Product
User reviews
Application areacarcar
Designwithout bodywithout body
Typepassivepassive
Size15" (38 cm)15" (38 cm)
Tech specs
Rated power350 W350 W
Max. power
1000 W /Peak/
1000 W /Peak/
Sensitivity88 dB88 dB
Dual voice coil
Impedance
4 ohm /single coil/
2 ohm /single coil/
Resonant frequency33,4 Hz34.1 Hz
General
Diffuser materialpulp / paperpulp / paper
Woofer Diameter380 mm380 mm
Added to E-Catalogmarch 2016october 2015

Impedance

The electrical resistance of a subwoofer when a signal is applied to it. This parameter is important primarily for selecting a subwoofer-amplifier pair: at a lower impedance than that of the amplifier, the subwoofer will distort the sound, at a higher impedance the sound will be too quiet.

For dual voice coil models (see above), the impedance is specified for one of the voice coils.

Resonant frequency

The natural frequency of the cone in the subwoofer speaker, namely the frequency with which the cone will oscillate if the speaker is suspended freely in the air and a single impulse is transmitted to the cone (for example, by clicking on it with your finger). In subwoofers, this parameter determines, in particular, the lower limit of the frequency range (see above): at frequencies below the resonant sound power drops sharply. Accordingly, for deep rich bass, the resonant frequency should be as low as possible. This parameter is also used to calculate the size of the enclosure for the subwoofer.
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