Might sound OK with a pure sine wave inverter... but how are you planning to install it? Car stereo amps have separate inputs for main power and a remote turn-on wire. That's not the case for inverters. (You'll pop a fuse if you try to run an inverter to run a 120V sub amp off the cigarette lighter port.)

https://www.parts-express.com/GRS-12SW-4-12-Poly-Cone-Subwoofer-4-Ohm-292-484?quantity=1
https://www.amazon.com/SCOSCHE-SE12KT-Inch-Subwoofer-Enclosure/dp/B01MRITNAZ/
https://www.walmart.com/ip/JENSEN-XDA92RB-Class-D-2-Channel-Bridgeable-Amplifier-80-Watts-x-RMS-600-Peak-Power-RGB-Illumination-System-Control-via-Bluetooth-App-Black/102710624
https://www.walmart.com/ip/KnuKonceptz-Complete-8-Gauge-OFC-Amplifier-Installation-Wiring-Kit/319464485?from=/search