AM 4

Frame: steel and aluminium from solid bar (AM 3), aluminium cast (AM 4)
Magnet: Neodymium
Voice Coil: diameter 26 mm in wounded copper, aluminium former
Surround: butyl rubber
Phase plug: aluminium from solid bar
Cone: glass fiber treated (AM 3), carbon fiber treated (AM 4)
Spider: silk (AM 3) and canvas (AM 4) formed at high pressure
Power: 80W RMS/160W max f>500Hz
Impedance: 4 ohm
Efficiency: 88dB (AM 3), 91dB (AM 4)
Mounting dimension: hole 76 mm, depth 30 mm (AM 3) hole 93 mm, depth 47 mm (AM 4)
Mesh grille included

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