09 Sienna Subs : 4 hdc3 18s c pillar below windowline Sub amp: ampere tfe 8.0 at half ohm.
Headunit: Pioneer 80PRS Mids/Highs amp: PPI 900.4
Front stage: 3 way active front stage with Massive Audio CKX tweets, alpine type R 6x9 midrange in doors + Crescendo PWX 10s in the kick
320 amp Singer alt. 1 group 34 under the hood 6 group31 agms in the back 560 amp hours total.
Alpine SWS-12D4 vs. SWA-12S4
Found these - $100
Would they be good for my amp?