Us horn sub guys just wanna hear how much better a horn loaded sub is than bass reflex with twin 18's.
It looks like it's about the same size as both of my DTS 10's stack together, which are almost 600 lbs. so your is light in comparions to two Danleys. LOL.
BTW, Two 12" driver is the same as one 18" driver in terms of radiation area. Since your new horn sub has an 18 and a passive, it should have the same power.