Never had any power to them. I metered them WITHOUT the brace in. The box was flexing so bad it would throw a bottle of water 3" off the top of the box. This was with a MB Quart DSC2000.1 on the pair @ 2 ohms, with the gain almost all the way down... So what, maybe 300-400rms per sub?
Even with no power and no brace I got a 146 @ 30hz legal without any testing. Did a sweep then burped that frequency.
Even sealed up on the dash playing music it was doing a 144.x with my DSC2150 on the pair of BTLs. Box was realllllllllllllllllllllllllllllllllllllll loud.