Looks like 80. It's a subwoofer only measurement, no speakers. AVR crossovers are usually 24 or 12 dB slopes.
I’m not sure the reason for posting my room dims and their predicted modes. Do you know if REW can determine this and reveal an applicable solution based of miced room measurements? I did not say that REW failed in providing proper solutions, sorry if you had that idea.
I feel that since you are the one making a claim about what @porgre should do, and disputing sight unseen what he has done, even while admitting that you don’t have full knowledge what he has done, that YOU should post said screen shots of YOUR processes. Start with your own solution path.
IIRC this subject has been broached in two separate threads where, yes, I have been quite critical of your claims/statements/ and overall approach, but I would hardly call two threads a whole forum. Some of my criticisms have indeed been too hostile, and I apologize for that.
If this is a graph of a subwoofer rolling off at 12 or 24 dB per octave, then yes, there is something not right here because that subwoofer is not rolling off in any hurry and is going to continue carrying on and possibly canceling out some of what the towers are producing.
I'm sorry you feel I am making too many unfounded claims, but in my last post I asked you to prove it. Lets use YOUR room, and demonstrate the effectiveness of REW, who's automated processes ARE, your recommended solution. If you aren't willing to use REW to prove my claims wrong, then you're not doing much of anything, except arguing for the sake of arguing.
I offered to help you, and given the ease of your mostly self contained listening space, it should be quite easy, even for a free program off the internet, no? I suggest a simple, tape measure based method that is quoted in a book from a Doctor with whom this forum claims to hold in high regard. So lets analyze your methods. Are you here to seek improvements, or are you here to prove your innate set up abilities? Pogre is still seeking improvement, so is too much to ask that you admit that, perhaps, REW can't do it all?
Let's say I measure everything in my room and you predict all of my room modes. Then I measure with rew and the graph correlates with the predictions. What would I do differently outside of eq'ing the highs and lows? My subs and towers are pretty much stuck where they are.
I've been very vocal about trying to reign in this effort to EQ all of the highs and lows. Some of them are just
are, and not actually a problem! That's why you need to know what influence the room is having. You bought a $50 textbook full of graphs, and not even the anechoic response of the JBL M2 measures like the graphs you've posted. So please do not feel that I am so presumptuous as to suggest that what you have done is not resulting in accurate reproduction. The fact that you're still seeking improvements further proves this.
With your subs and towers stuck where they are, there will be a limit to how good of performance you can achieve. But you have been convinced that DSP will solve every problem, despite the 500 pages of knowledge you have that explain very clearly what DSP can and cannot do. I've spent quite enough time with this, so if you want try it, please do, and I'll be there to help.
But this back and forth of the validity of my claims, that are quoted in a textbook that you own, has got to stop.
"To compute the frequencies at which axial standing waves occur, simply measure the distance between the walls, and divide that number into the speed of sound in whatever units the measurements were done." 'Sound Reproduction'
What am I not explaining from this statement, clearly?
@TheWarrior, this is the question that has been asked before(by me also). It’s not that pogre isn’t asking, see quote above. It’s that there hasn’t been a clear solution path. Even an arbitrary one would do. For example, if you have a low tire, connect air supply, and inflate to proper pressure level. So, knowing where the modes are when you can’t move your LP, or gear will be addressed by doing what? That’s the question. A solution path with arbitrary numbers is fine. We’re just looking for the path.
The path is to understand what your room is doing to the measurements. This thread is 30 pages long, and yet, everyone is still looking for better solutions than what REW offers. I suggest a data gathering method, and I've spent more time trying to argue the validity of that method than actually helping people utilize it.
If REW can predict your modes, then you're all set, right?
No? Then give it a try!
For your graph, I've made it pretty clear that without knowing your room's dimensions and setup, any recommendation is purely guessing. Provide complete data on the room and I'll try to help!
Can anyone describe the standard resolution of their waterfalls in frequency vs time that allows them to compare graphs to others, even in other rooms, that define waterfall's usefulness?
Floyd couldn't, so I don't know why you guys are still trying.
Here are the falls for Sub only and 7.1 (5 subs in total) channel, REW default setting.
View attachment 22525 View attachment 22526 View attachment 22527
PENG, same issue - lovely graphs, no details.
If the room is in control of what you hear at bass frequencies, why is no one providing information about their room?