Alpine Type R Voice Coil - Dual 4 Ohm - 10, 12, R10, R12
CUSTOM MADE Aftermarket Alpine Type R Voice Coil. - 2" version on black anodized aluminum former. Fits BOTH the TYPE R10 and the TYPE R12 such as the SWR-1022D and the SWR-1222D. Coil is an upgrade for the SWR-1021D and the SWR-1221D, and fits many other subs that require the specs above.