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

(Archived Product)

Frame 4"
Magnet Neodymium
Voice Coil Injected copper 26mm diameter, aluminum
Surround Butyl rubber
Phase Plug Solid bar aluminium
Cone Treated carbon fiber
Power 80W RMS, 160W MAX
Impedance 4 Ohm
Efficiency 91dB
Mounting Dimensions Hole 93mm, depth 47mm