5555-16059-00 - 6-1/2 inch outer diameter 4 ohm woofer speaker used in many pinball machine and video cabinets
Goldwood Dual Voice Coil 10 in. Woofer 220-Watt 6 ohm Replacement Speaker GW-410D - The Home Depot
Gallien-Krueger 082-0790-B 10” 200W 6 Ohm 50Hz Woofer For MB110 | Full Compass Systems
JVC 165B160S 6 Ohm Speaker Subwoofer | eBay
PRO Audio Subwoofer Speaker Driver 8 Inch 6ohm 80W Professional Subwoofer Driver Speaker - China Subwoofer Driver and PA Speaker price | Made-in-China.com