hey there guys. im new to the site. im From Brisbane Australia.. i hada few Questions. currently we have dual DD 9512 in a honda jazz. our best is 152.4 db. in australia thats coming very close to the record of 152.8.... but the record from the states is like 158... can anyone explain this" we have spent many days working on designs for boxs. and 2 date thats our best... has anyone here pushed more then that?