Will a jbl car amplifier 5 channels 660 watts be enough to a subwoofer of 1000 watts?

What you want to look for is the RMS of the amp and the sub. . . im going to guess that the 660 is the peak watts of the amp and the 1000 is the peak of the sub so in that case the amp would push it but not like is can be pushed. . . with 1000 watts your sub's rms is around 600 i would guess so you need an amp around 600 rms and you want to get and amp that has 2 channels so you can bridge the amp and get more power to your sub you can try that with the 660 watt amp you have and you should hear a big difference. . .