I do seriously attribute this score to the amplifier. There isn't anything special about the box. Its a simple enclosure with only one vertical 2"x2" brace in the center to help support the baffle. No resin, glass, corner tricks, or double baffle. The CVRs are basic, entry-level, cheap subs so I'm definitely not giving them any credit for this score. Sundowns are simply awesome amps and I'm seeing a ton of power out of this thing @ 0.5ohm.sundown powa ftw