which one... one re sx 15" or two 12" alpine r's? they will be in a total box size of about 4.25 cu ft. re will be powered with a re 12.1, r's will be powered in a series with a hifonics 1606d amp.
i have a SX 15 and im actually a little disapointed with it, in the volume anyway, the SQ is good, but i actually think 2 rls would be louder becasue they have so much more cone area
my sub doesnt suck, its just not quite as loud as the v-maxes i had, it does have better SQ though, im building a better box with more room and areos and higher tuneing, i hope that will do the trick
it does get loud though, just not lound enough
if it still isnt loud enough i was considering 2 type r's, or mabey 2 SE or somehtin i donno