Hertz Mille Pro MP 250 D2.3 PRO - 10 inch subwoofer
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utstanding performance in a compact size, this is the target of Mille Pro car audio subwoofers. On the strength of itsknow-how acquired with Mille Legend, the R&D team has optimized the production process to offer the “Hertz Sound Experience” to a wider audience using part of the technologies and materials of the flagship line. TheMP 250 D2.3cone is made by pressing paper pulp with the injection of mineral powders, the same construction technique used for Legend. TheV-cone®profile increases rigidity, allowing the cone to function like a piston. Surround materials consist of high-purityIIR-butyl rubber. Like the Legend ML2000.3 and ML2500.3, the Mille PRO subwoofers are built with Boundary Free Surround technology allowing for a greater emission surface with equal diameter, generating higher sound pressure. The compact6-spoke aluminum alloy anti-resonantbasket is the same as the top model ML 2500.3 and contributes to the subwoofer’s mechanical damping, being absolutely transparent to the sound. The65-mm 4-layer voice coilis higher than 60 mm and wound in a TIL-P former, thus delivering high linear displacement. The2 Ω + 2 Ω DVC impedance configuration improves versatility to match any amplifier system. The air cooling and decompression system avoids the need for a centre hole on the bottom plate with three advantages:
–Better thermal inertiato ensure low operating temperatures during musical transients; –Maximization of the magnetic field inducedto the coil with the same overall motor dimensions. Thanks to a greater amount of iron in the pole the likelihood of magnetic saturation decreases exploiting the maximum flux density generated from the magnet; – Possibility toinstall the subwoofer right on the box wall, taking full advantage of its minimal dimensions. A damping rubber disk, provided with the product, secures the subwoofer to the box and ensures air exchange for the 10 vents on the bottom.
The holes behind the voice coil winding andthe 10 vents on the bottom plate ensure greater air exchangeto the coil inner layers and work in synergy with an innovative assembly system. It forces the air to pass through the air gap to keep the coil operating temperature low, even with the most extreme musical programs. The terminal usessolid push connectors with an antishort circuit coveraccepting cables up to 8 AWG to provide ultra-low wiring resistance in low impedance configurations (1ohm).
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