sku

Not sure why the peak frequency would drop like that but did you try raising your enclosure tuning to fix this issue? If you made a bigger box for the 4 12 setup, it should had displaced more airspace in your listening env. This should have raised your resonant freq. To me a Yukon's peak frequency is probably right around 43-45 hz...so yeah if you're peaking at 40, it won't be optimal for all out SPL...

Yep, you're right. I took a look at the DBDrag classes and didn't see Driveby or anything close http://www.termpro.com/dbdrag/rules/#_Sect...%20Classificati On a side note, you should take your show on the road -- C'mon up to Seattle/Portland for the summer comps circuit -- so I can get a demo My buddy owns this Tuning shop...I'm sure I can arrange a DB showoff/soundoff at his shop http://www.tkomotorwerks.com/

Mad props Steve! I think you are 1 smart fella. Using your love of car audio to promote yourself, making people connections, getting yourself known -- nothing better then doing what you love! Ditto for the promotion as well! Have you ever thought about competing in Driveby since you don't want to do DBDrag style anymore (i.e. the window line rule)? Man the 'Hoe would do awesome! Or do I have it wrong and the rules apply for Driveby?