2021 Tesla model s plaid with 2 12” subwoofers

2021 Tesla model s plaid with 2-12” skar veg subwoofers with stetsom ex8000eq running at 4 ohms. No tying in too model s’s electrical except for speaker leads for Line in converter. Subs are being powered by 3 lithium ion phosphate life p04 batteries in parallel giving 300 amps output continuous at 13.2 volts.