The AP 4 midbass offers very extended frequency response, both in high and low frequencies, combined with high efficiency and features a 25 mm pure copper voice coil to ensure more balance in mid-high frequency ranges. Features - Very extended frequency response, in both high and low frequencies, combined with high efficiency. No passive crossover required to maximize efficiency: the cone is optimised with the Klippel R&D Scan Vibrometer to obtain a calibrated mechanical low-pass cut-off frequency. Water-repellent treated paper cone, featuring a profile developed with FEM (Finite Element Method) simulation technology and optimized with the Klippel R&D Scan Vibrometer. Reduced mounting depth, providing ease of installation in OEM placements. TPU (Thermoplastic Polyurethane) surround, featuring the exclusive shallow “Triple Wave” profile, for maximum excursion linearity. 25 mm pure copper voice coil; ensuring precise balance in the mid-high frequency range. Compact basket, protected by abrasion-resistant and scratch-proof coating.
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