Yeah, the centre on the horizontal side of the room is where my second sweeter spot is! My current spot which is at the far side of the room does mess up the frequencies massively between 60 and 40hz.The dual sub's I think is somewhere around 55 or 56K. Not quite sure though.. Need to check.
The only requirement of a sub is for that ultra low frequency on some of the tracks & for the rest of it the towers can produce a good amount of bass. For me the main concern is the room size of 10500Cft. To fill that kind of room with bass with great authority i feel a sub is required.
Another surprising fact in the same room is, when I move the towers to the same place where I have the TV and the Elac's, which is at the center of 35ft (The horizontal side) I don't feel the need for a sub.
So indeed the room and placement of speakers do play a major role, especially when it comes to low frequency is what i have understood.
How is it with you? Does your room also mess up the low frequency?
And by the way, How is FX Audio Tube 03? I was trying to get my hands on it too..
the fx audio tube 03 boosts the lower mid upper bass frequencies at the expense of deeper bass frequencies which sound a bit muddy. The presentation becomes warmer overall and the sonic presentation becomes different, dare i say slightly holographic?