I have a 3 month old JL Audio W7 12 " in a subwoofer box . And a 1000/1 Amp V2.
Subs were only seeing 1/4~1/2 power and was never abused or bumped hard.
Had it for 3 months on my car but i only put 2k miles on it soo subs werent used much.
Subs are out of car and amp will be coming off...