FR 1215-G FR 1238 FR 13 4 OHM FR 13 - 4 Ohm FR 13 WP - 4 Ohm (black) FR 13 WP - 4 Ohm (white) FR 13 WP 4 OHM (BLACK) FR 13 WP 4 OHM (WHITE) FR 131.30 - 8 OHM FR 1338