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D8.8+ Bass-Midrange

Shallow mineral filled polypropylene cone;
Fatigue resistant foam surround;
Inside vented magnet system with huge Ferrite magnet;
Long-throw symmetrically driving motor structure;
Extreme power handling voice coil with 100mm diameters black anodized aluminum former;
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.


General Data
Nominal Power Handling (Pnom)(W)150
Max Power Handling (Pmax)(W)300
Sensitivity (2.83v/1m)(dB)86
Weight (M)(Kg)4.2
Electrical Data
Nominal Impedance (Z)(Ω)8
DC (Re)(Ω)6.5
Voice Coil and Magnet Parameters
VC Diameter (mm)100
VC Length (H)(mm)23
VC FrameKapton
Magnet SystemInside
Magnet FormerNeodumium
Force Factor (BL)(N/A)13.6
Gap Height (He)(mm)8
Linear Excursion (Xmax)(mm)7.5
T-S Parameters
Suspension Compliance (Cms)(uM/N)235.25
Mechanical Q (Qms)6.16
Electrical Q (Qes)0.471
Total Q (Qts)0.424
Moving Mass (Mms)(g)60.19
Effective Piston Area (Sd)(m2)0.0241
Equivalent Air Volume (Vas)(L)34.9
Resonance Frequency (Fs)(Hz)36

Pictures of D8.8+
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