Sub-woofer 15", carta trattata, neodimio8 Ohm, 2000 Wmax
Sub-woofer 15", carta-kevlar, ferrite, 4 Ohm, 600 Wmax
Woofer 15", cono alluminio 4 Ohm, 1000 ...
Sub-woofer 15", Nomex+fibra vetro, ferrite, 2+2 Ohm, 1.6 ...