Well, I could make a similar argument for the Rythmik F12SE Signature vs. the REL. Like the REL it offers high-level inputs but goes to 14Hz (-2dB) vs. 20Hz (-6dB), uses a 12” woofer vs. 10”, offers continuously variable phase adjustment vs. a 0/180 degree switch, and is sealed vs. needing a passive radiator. The one area where it falls short is it has a 375W class A/B amp vs. 500W amp in the REL, but I’ve never heard of a Rythmik sub being underpowered. Last, it’s about $1300 less than the REL — the beauty of selling direct. No brainer to me, so the question is do you hate money? 😜