Originally Posted by wes k
Right now I have the sub placed in the front right corner of my 12 x 17 enclosed room. I have 8 GIK acoustic panels and bass traps in each corner. After running audyssey in all 8 positions I further eq'd it from the listening position with the antimode 8033. I got very clean bass but not the output I am looking for. I then turned on the denon's manual channel level tone to check spots in the room. The listening position is about 3db low and about 5 feet to the front left of that it is about 5db higher. There seems to be a void at the listening position which is in the middle of the room.
What should I do now? I am a little limited on where I can place the sub. Do I move it as much as I can or do I eq some more?
No amount of EQ from AntiMode or MultEQ will help. You are sitting in a null, or two. EQ cannot fix nulls, nor fix seat-to-seat variation at specific frequencies.
If you have the sub in the corner, and GIK panels in the corners, it might help a little to pull the sub out to 1/4 the length/width of the room, then make sure the corner is completely covered by the traps. But I can report based on my experience with my room, which is 11.5' x 17' x 8', that nothing I did with my sub was able to materially mitigate the nulls in the sweet spot, nor the large variations in bass levels in the other seats. Based on what Toole/Welti have taught (for example, see p. 23-26 of this doc
), you'll need at least one more sub and careful placement. I went a step further
and use several "virtual" subs tuned by a BassQ processor, and that worked.