Subwoofer with Thiel 2.4s?

Used RELs are a often a steal, and it mystifies me why anyone wouldn't be able to dial them in to fit with most speakers. Level (the most important knob IMO), frequency point, phase, etc., should allow for just about anybody's taste for bass needs. I have heard that if you have bass heavy main speakers you can risk a wallow in some mud, but in that case just remember the level knob, or move the damn thing around...my older, bought used ($200!) Q150e is astonishing...I stand astonished.

Anyone aware of the "charge the room" theory of subs? Although it might seem like another example of "audio mysticism", it appears to be real. Listen to music that has seemingly no bass with and without a (well designed, like a REL) sub. Without it the mojo disappears. Mandolin stuff illustrates this point...some say the sub sort of "charges" the air. Without the sub you could be experiencing a "mojo filter".

I'm a 2 subbed (2 subster? "sub" stantial?) listener as I scored another REL from the same era as my Q150e…(a Q108II). 2 subs actually help remove some of the corner roll off boom by introducing an in-phase signal to the bass that escapes along the wall from the other sub to meet up and MODE so to speak. The Q era REL subs have lots of adjustability so integration into the room isn't so difficult at all…and you can buy these damn things pretty cheap (both of mine are perfect and cost about 200 bucks each…you simply have to wait for one to come along).