Description:  HIVI D8.8  Ultra Quality Subwoofer

 

D8.8 Hi-end Woofer

 

 

Overview

Break the tradition electroacoustical design principle of Hi-Vi D8.8!

The Euro-American nation develops in the loudspeaker up has been be placed in a leading position. 10 years ago, Hi-Vi engineers hope to look for a break, which will make Chinese people also can design a new generation loudspeaker with high index and performance by ourselves. At that time our springboard is to design a small caliber loudspeaker, using a small box can produce a very grand low-midrange sound field. Its voice should be neutral and nobler, it also should be a modern art article. Now this D series loudspeaker basically achieve our original conceive, the D series loudspeaker adopted the latest design in a series of world new concept.

Shallow mineral filled polypropylene cone; Fatigue resistant foam surround; Shielded vented magnet system with huge Neodymium magnet; Long-throw symmetrically driving motor structure; Extreme power handling voice coil with 100 mm black anodized aluminum former; High density aluminum die-cast frame;

Progressive spider with decompressed rear volume. D8.8 represents a design where the voice coil is positioned over an undercut central pole piece with a large thermally stabilized Neodymium magnet at the bottom and high energy ceramic magnet on the top. A specially shaped, CNC machined steel cup completes the magnetic structure from the outside, creating a shielded magnet system with symmetrical flux density distribution along the gap. The long-throw voice coil experiences a symmetric driving force and substantial decrease of inductance and back electromotive force modulations.

The whole magnet structure is optimized using Finite Element Analysis. The result is a radical improvement of driver linearity. The cone has a shallow, high integrity structure, which is extremely rigid and dynamically stable. The large voice coil diameter allows more uniform cone excitation, thus improving phase and transient characteristics of the driver, resulting in clear and accurate reproduction. The vented design, effective and uniform cooling of a high temperature rated voice coil provide a dramatic increase of power handling.

D8.8 is excellent as a woofer for high power "no compromise" audiophile systems. It also may be used as a subwoofer in various configurations.

 

Specifications

Nominal Impedance (Z)(Ω) :          8

Resonance Frequency (Fs)(Hz) :    32

Nominal Power Handling (Pnom)(W) :       150

Max Power Handling(Pmax)(W) : 300

Sensitivity (2.83v/1m)(dB) :           86

Weight (M)(Kg) : 3.5

VC Diameter (mm) :         100

DC (Re)(Ω) :         6.5

VC Length (H)(mm) :         23.5

VC Former :         CCAW

VC Frame :          Kapton

Magnet System :               Inside

Magnet Former :              Neodymium

Force Factor (BL)(N/A) :  12.9

Gap Height (He)(mm) :     7.0

Linear Excursion (Xmax)(mm) :     8.3

Suspension Compliance (Cms)(uM/N) :      457.8

Mechanical Q (Qms) :      4.36

Electrical Q (Qes) :            0.44

Total Q (Qts) :     0.40

Moving Mass (Mms)(g) : 53.1

Effective Piston Area (Sd)(m2) :    0.0241

Equivalent Air Volume (Vas)(L) :   37.8

Cabinet Type :    Vented

Recommended Box Volume(Vb)(L) :           30

Tuning Frequency(Fb)(Hz) :            35

-3dB Cut-Off Frequency(F3)(Hz) : 35