JL Audio 12W7 W7 12" Sub WORKS PERFECT!! NEAR MINT!! - $419.99
Infinity Kappa Perfect 12VQ Subwoofer - $5.50
Infinity Kappa Perfect 12.1 Auto Subwoofer 12" 350 RMS - $52.00
Random 10" sub. CHECK IT OUT. PERFECT FOR TEST BENCH. ! - $10.00
OLD SCHOOL JL AUDIO 12W6 IN PERFECT WORKING CONDITION!! - $0.99
What you describe may have more to do with how they are wired than the box they're in, unless the box was ported. Putting the subs in the wrong box can damage subs.
I checked them out. A couple of concerns. these enclosures didn't indicate the port diameter and length. Most subwoofers that are placed in ported enclosures are pretty sensitive about port length and diameter. Those kickers work well with specifical...
Yes, they are assembled. The only exceptions I know is some of the boxes from Wal-Mart.