F12
 
  HiVi research 12 inch woofer
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General description

Light and extremely rigid cone made from Kevlar? Paper composite- Sound is natural and accurate.
Germany special manufactured anti-tired high loss natural rubber surround: fully absorb unwanted vibration energy!
Britain produced high-transparent and high-steady spider-can improve the characteristic of compliance air compressing.
Outside magnet high performance magnetic system: dynamical linear drive resource.
Hi-Vi Symmetric Motor Drive (SMD) technology makes the voice coil into a symmetrical driving magnetic field, thus acquiring symmetrical driving force, reducing the mutual modulation of voice coil inductance and back electromotive force, improving the controllability of the speakers, achieving low distortion degree
Finite Element Analysis for high density aluminum frame, prevents the parasitic structural resonances
High power handling, heat-resistant Kapton? Voice coil former: the guarantee of high quality bass.
Sound features: The low frequency shocking, high analysis, energetic.
Suitable for bass unit of 3-way vented floor-standing loudspeaker system in home, and also suitable for sub-bass unit of sub-bass loudspeaker system
Accurate and uncompressed reproduction of very low bass at realistic levels represents the ideology implemented in this driver. The design of the F12 has been optimized for balanced and dynamic low bass reproduction in compact or medium vented systems and subwoofers.
The F12 utilizes a newly developed matrix of Kevlar and paper fibers. As a result, the cone weighs less, is more rigid, and has an improved dampening factor over conventional Kevlarš materials. The back of the cone is hand coated with a special dampening compound to further maximize performance stability and control of structural resonances.
The moving system of the F12 is very stable and will not break up at high power levels. The long-throw voice coil with Kapton?former and vented pole piece prevent overheating and thermal compression. The massive aluminum die-cast basket with multiple point mounting has been developed to minimize parasitic structural resonance.
The F12 is a remarkable woofer with a detailed, punchy yet easy breathing and rich bass. Recommended crossover frequency is 300-800 Hz.

Nominal Impedance (Z)(Ω) : 8
Resonance Frequency (Fs)(Hz) : 26
Nominal Power Handling (Pnom)(W) : 100
Max Power Handling(Pmax)(W) : 200
Sensitivity (2.83v/1m)(dB) : 89
Weight (M)(Kg) : 6.2
VC Diameter (mm) : 50
DC (Re)(Ω) : 6.5
VC Length (H)(mm) : 22
VC Former : SV
VC Frame : Kapton
Magnet System : Outside
Magnet Former : Ferrite
Force Factor (BL)(N/A) : 16.1
Gap Height (He)(mm) : 10
Linear Excursion (Xmax)(mm) : 6.0
Suspension Compliance (Cms)(uM/N) : 387.0
Mechanical Q (Qms) : 6.21
Electrical Q (Qes) : 0.39
Total Q (Qts) : 0.36
Moving Mass (Mms)(g) : 99.9
Effective Piston Area (Sd)(m2) : 0.0515
Equivalent Air Volume (Vas)(L) : 145.6
Cabinet Type : Vented
Recommended Box Volume(Vb)(L) : 60
Tuning Frequency(Fb)(Hz) : 30
-3dB Cut-Off Frequency(F3)(Hz) : 35

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