I was shocked running REW with my new sub (empty room) to find a nasty nasty null. I've moved both my MLP and sub around to a number of positions and could use some guidance. My room's dimensions aren't THAT far off a recommended ratio--or so I thought.
Is this my room--or my sub?
Would love an expert opinion--especially what is happening when I add Roxul in the corners. I would like to keep my MLP as centered (width) as possible for imaging.
Room is 120" by 196.5" by 88". The room is sealed--double walled--double solid core doors. The "room layout.jpg
" below doesn't show the window on the top wall, the door on the bottom wall left, or the closet for the equipment rack on the bottom right.
I'm working on it.
Running REW I found the best height for my MLP was around 39" from the floor. Got steadily worse until 50" was abysmal. Moving the MLP forward and backward "move MLP depth.png
" I found 64" from the back wall (top green) to be the smoothest. Then weeks later I continued my testing at 74" (38% rule perhaps?) though I'm now not sure why as 64" was superior...
"Move Sub along wall
" had me running the sub toward me along the right wall until it was comically close to the MLP--perhaps not doable. It ended up looking the flattest at 64" off the front wall "sub along side wall right
Fearing this didn't seem a very viable placement I found the flattest response along the front wall placing the sub at about 31.5" off the left wall, and 48-52" into the room "best along front wall
Finally I temporarily placed 3 bags of Roxul safe n sound in the corners. Front left and right and back left "adding roxul
Adding the Roxul did some pretty funky stuff from 60Hz upward that I don't understand. I've also included a waterfall comparison "adding roxul waterfall
UMIK-1 with horizontal orientation and calibration file
Onkyo 805 with audyssey disengaged and crossover at 120Hz (highest it will go)
SVS PB-2000 at 75dB, phase at 0, input on LFE
So.....what insight does any of this provide--if any? How close could I get this response to flat without a second sub and just using placement and a miniDSP do you think? Would dual subs in such a small room (damn you ceiling!!!) even be beneficial?
I wish I hadn't blown my budget on a single sub! Doh!
Edit: Apologies in advance--it appears I had my graphs end at 120Hz--not 200Hz as instructed...