The GRS 15PR-8 speaker is the best choice you can make if you need to replace a worn out, blown 15" woofer.
GRS 10PF-8 10" paper cone woofers are ideal replacement speakers for use in sealed-box loudspeaker systems in almost any application.
ANN-515 Passive Sub-Woofer Speaker, Metallic Silver Finish. 2 Front Air Port Tubes Damping Foam Assembled Inside 1 Pair 5 Ways Speaker Jacks Freq. Resp.: 23Hz ~ 500Hz Sensitive: 90 dB Resistance: 6.5 ohm Handling Power: Analog Min.100W/Max. 300Watts, Digital 500Watts. Weight: 37 lbs Dia.: 18.5"(H)x 15"(W)x 18.5"(D)