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based on specially developed adaptor rings
Cone area Sd 219 cm² Moving mass Mms 69 g Cone material Hand-scooped paper cone Mechanical resistance Rms 4
design and function intertwine
Sturdy steel basket with additional ventilation holes for better voice coil cooling and high power handling
BMW 4" Speaker Upgrade Type 1 - HELIX Ci3 Midrange to Suit Various BMW Models | 3Ω m_Over 100W based on specially developed adaptorOverview Car Specific Speaker Upgrade Kit This is a car specific speaker upgrade package consisting of a premium speaker and a vehicle specific mounting adapter to suit the selected vehicle. Its designed for a straightforward installation using the supplied adapter, allowing the speaker to fit the factory location without cutting or modifying the vehicle. (Some vehicles might have a different configuration; a pre check is recommended) The upgrade is