I still believe the hoopty has a spare db or two that careful tuning can bring it up,...and 3 dbs is twice as loud....not to mention the hoopty isn't really a wall and still has an assload more air space to fill...the tl just measures pressure in the vehicle, so air space is a huge factor. Not trying to diss, but it is how I see those subs can get so loud....also they might be tuned high, I didn't see what the box was tuned to anywhere.