JBL 15\" Woofer 124-67001-00x with screen dust cap. For use in the M115, M-115, M 115, M115-8, TR Series, EON 1500 (non powered), TR125, TR-125, TR 125, EON1500 Sub, CAB25, CAB-25, CAB 25, CAB45, CAB-45, CAB 45, and many more. This 15\" is rated by JBL at 225 Watts RMS / 450 Watts Continuous / 900 Watts Peak. It is 8 ohms.
New replacements for this model the M115-8A retail for around $250.