@dlcockrum
Nice breakdown.
One thing I would like to touch on:
REL SUB-BASS SYSTEMS are designed to provide room pressurization of frequencies around and below 20hz and to slightly augment bass performance of full-range loudspeakers in that region.
You would have to go really high up in their price range to get that low. The $1300 T9i is only be down to 28Hz at -6dB. And while we would are disregarding the benefit of the REL’s integration, the ~$500 Rythmik L12 (which is very musical for the price) is rated down to 12Hz at -6dB, for all those pipe organ lovers, something even the $7500 REL reference model doesn’t quite achieve.
But it is true most music doesn’t go below ~30Hz, though it’s still nice to have a subwoofer that can still handle that without strain, as those specs are given at low wattage, and they very much so would have some compression on their low end when playing back at reference levels.