Rbirke,
I don't know how many times I've heard other REL owners say the same thing as you, and that's why I intend to buy one myself to improve the already great sound I'm getting from my ProAc 2.5s.
I guess when a sub bass system is well designed and set up correctly it can yield improvements in the main speakers even if the sub is completely separate from it. The point you make about the REL pressurizing the room and being able to back off the volume to the mains may be the key.
I don't know how many times I've heard other REL owners say the same thing as you, and that's why I intend to buy one myself to improve the already great sound I'm getting from my ProAc 2.5s.
I guess when a sub bass system is well designed and set up correctly it can yield improvements in the main speakers even if the sub is completely separate from it. The point you make about the REL pressurizing the room and being able to back off the volume to the mains may be the key.