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