agreed even ai had 2.308d4s in a 38hz tuned box provided them 1000rms nd also had typ r 15"(provided below 1k rms),typ r 12", both in a tund box sometimes in 32hz nd sometimes in 38hz well typ r 15" outclass 308 in all aspects at dat time.so there is no match ov 308 with typ r either with 12" or 15".
@poster specially:ai had highroof 07 also nd installed 2.308d2 in a 38hz tuned box with fusion pp.am15001 cnctd them at 2ohms with 65amp dry cell battery,stock alt,4awg sound quest wiring.RESULT=no amp trip,loud like hell,even ma amp were nut heatup like iron even they were louder then ma sedans 307 setup.ask ma fellows(kevin,booster,umar_shah,maggi,fc)they all knw abt performance ov ma highroof system!!so according to dat ai recommend u dis.
A.2.308d2,d4 with fusion pp-am20001(also best for type r 15" or 2.type r 12") with 4awg wiring nd 65amp battery in a tuned encl as per ur choice.
B.in case ov only 2.308d2 then fusion pp-am15001 with 4awg wiring nd 65amp battery also in a tuned encl.