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Does dual sub matter if both subs have equal dips/peaks in REW room sim?

Mort said:
Only with multiple listening positions.
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That's not really true. Theoretically true if you can put your single subwoofer anywhere in the room, but that is unlikely to be the case.
 
sigbergaudio said:
That's not really true. Theoretically true if you can put your single subwoofer anywhere in the room, but that is unlikely to be the case.
Click to expand...
Sounds like it is really true.
 
We see the same thing when we change from subs on the floor to sub towers, the respons is in most cases significantly improved.
 
1 vs 2 subs, just a simple example (1 sub = dotted, 2 subs = solid):

1758112128701.png
 
I've not read the thread, but just because 2 subs are "physically" mirrored doesn't mean you have to play the same audio signal through both of them. TLDR: Dirac ART.
 
At low frequencies, we do not hear direct sound, but reflected sound. This means that moving just 0,5m can change the bass quite a lot. So yes, distributed bass-sources, is a smart way to have better bass.
I can get up from my chair and move around quite a bit, and I do not hear big changes in the bass, which means that I can hear music and watch something from the kitchen, and still have quite good bass. Multiple subwoofers are awesome. Hide them, DIY them, buy them, scatter them around the room - then do it right - and you'll have better bass.
I tried it so many times now, in so many different rooms and systems - and it works. If it does not work for you, then you have unknown technical problems or lack of knowledge/skills - try again, it's a hobby :)
 
Mort said:
Only with multiple listening positions.
Click to expand...
No, you can get a better frequency response with 2 subs even for only one & the same MLP.
 
PashkaTLT said:
No, you can get a better frequency response with 2 subs even for only one & the same MLP.
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More subs is better for even just 1 listening position. Reason is very simple: we hear from 2 listening positions at all times- one from each ear which are separated by a distance of around 150cm, and unless you put you head in a vice, you will move your two ear listening position forwards and backwards by plus or minus or side to side another 30-40cm as you lean on one arm or the other or shift around a bit. The frequency response from a single subwoofer at different positions within a 90cm diameter sphere centered at the main listening head position can be very materially different. 3 or more subs is even better - I can clearly hear the difference in smoothness and consistency in my setup when I go from 2 to 3 subs (and the subs are very finely tuned for frequency response using MSO and Anthem Room Correction in both the 2 and 3 sub configuration), and I always sit on the same spot. Going from 1 to 2 subs is an even more dramatic improvement.
 
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DaveBoswell said:
More subs is better for even just 1 listening position. Reason is very simple: we hear from 2 listening positions at all times- one from each ear which are separated by a distance of around 150cm, and unless you put you head in a vice, you will move your two ear listening position forwards and backwards by plus or minus or side to side another 300-400cm as you lean on one arm or the other or shift around a bit. The frequency response from a single subwoofer at different positions within a 900cm diameter globe centered at the main listening head position can be very materially different. 3 or more subs is even better - I can clearly hear the difference in smoothness and consistency in my setup when I go from 2 to 3 subs (and the subs are very finely tuned for frequency response using MSO and Anthem Room Correction in both the 2 and 3 sub configuration), and I always sit on the same spot. Going from 1 to 2 subs is an even more dramatic improvement.
Click to expand...

That we have two ears is is not really the reason. The reason is that subs in different positions in the room will excite different peaks and dips due to different distances to the boundaries (walls) in the room. This will with a bit of luck even out the frequency response compared to one sub in a single position.

I am also very curious to understand why you think your ears are separated by 150cm.
 
sigbergaudio said:
That we have two ears is is not really the reason. The reason is that subs in different positions in the room will excite different peaks and dips due to different distances to the boundaries (walls) in the room. This will with a bit of luck even out the frequency response compared to one sub in a single position.

I am also very curious to understand why you think your ears are separated by 150cm.
Click to expand...
Yes, for example my left sub has a very deep null at 41Hz, but the right sub doesn't have this null and able to partly compensate for it (providing good SPL at this frequency) so that the resulting frequency response is much flatter than it would have been if I only had my left sub.
We can think that I could just put my left sub to where my right sub is located, and then I wouldn't need 2 subs, but then I'd hear & feel bass & sound pressure coming only from my right and it's pretty uncomfortable. Now I have bass coming evenly from both sides.
 
sigbergaudio said:
I am also very curious to understand why you think your ears are separated by 150cm.
Click to expand...
I imagine they were getting their units mixed up. 150cm is absurd, of course. 150mm, on the other hand, seems a pretty reasonable number.
 
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