RE MX and Hifoncs BXI2008D Amp ?
#2
2 L7's will be louder all other factors being the same. as for better. I have no experience with the RE sub, but L7's in a properly designed custom enclosure can be phenominal SQ subs. also 35hz isn't a magic nmber. depending on the specific subwoofer, lower or higher tuning can work out better for SQ