I'm having some difficulties trying to figure out just what is causing a couple of room nulls in my listening area. Hopefully the attached .mdat contains the room simulation data as well as a sample of the RTA (using MMM) at a typical listening location; if not, I can attach a sketch of the room and positions of the speakers. This is a raw capture - no EQ at all.
I've tried moving the speakers (not easy, as they're gigantic - a pair of 70s Magneplanars), the listening chair, etc. but the suckouts at 144 and 280 Hz are stubborn. So I'm pretty sure they're room rather than position related but I can't identify from the REW room sim exactly which dimensions are at fault. My simple-minded interpretation of the data is that I have a couple of tangential modes, but if anyone wants to weigh in on other interpretations of the data, I'd be glad to hear any thoughts.
One thing that is important is that the room ends in a stairway at the rear; the stairs cut diagonally across the room and add a few feet to the depth in that area. I have no idea how to deal with the strange dimensions in REW's room simulation. The speakers, which are each 4' x 6' and 1" thick, pretty much span the room width (don't know how to show that in REW either), so moving them side to side is not an option - plus, limited repositioning tests indicate that's not the major problem.
The sound is really pretty good after I EQ the low end, but of course I would just be wasting power to try and fill in the nulls, so they are largely unchanged (though audible). I hope there's a way to reduce them without major carpentry. Or am I out of luck?
I've tried moving the speakers (not easy, as they're gigantic - a pair of 70s Magneplanars), the listening chair, etc. but the suckouts at 144 and 280 Hz are stubborn. So I'm pretty sure they're room rather than position related but I can't identify from the REW room sim exactly which dimensions are at fault. My simple-minded interpretation of the data is that I have a couple of tangential modes, but if anyone wants to weigh in on other interpretations of the data, I'd be glad to hear any thoughts.
One thing that is important is that the room ends in a stairway at the rear; the stairs cut diagonally across the room and add a few feet to the depth in that area. I have no idea how to deal with the strange dimensions in REW's room simulation. The speakers, which are each 4' x 6' and 1" thick, pretty much span the room width (don't know how to show that in REW either), so moving them side to side is not an option - plus, limited repositioning tests indicate that's not the major problem.
The sound is really pretty good after I EQ the low end, but of course I would just be wasting power to try and fill in the nulls, so they are largely unchanged (though audible). I hope there's a way to reduce them without major carpentry. Or am I out of luck?