Can the human ear really localize bass?

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If you think that you get "flat bass" in your room, I think that this is a funny idea, unless you happen to have a warehouse like Pano to play in (and even then I dunno).

That's what I'm listening to:

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Not funny but fun and no warehouse either ;)
 

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"The Abyss subwoofer, for example can reproduce pitches from 18 Hz (which is about the pitch of the lowest rumbling notes on a huge pipe organ with 32-foot (9.8 m) bass pipes) to 120 Hz (±3 dB). Nevertheless, even though the Abyss subwoofer can go down to 18 Hz, its lowest frequency and maximum SPL with a limit of 10% distortion is 35.5 Hz and 79.8 dB at 2 meters."

"Keyboard players who use subwoofers for on-stage monitoring include electric organ players who use bass pedal keyboards (which go down to a low "C" which is about 33 Hz) and synth bass players who play rumbling sub-bass parts that go as low as 18 Hz."

Subwoofer - Wikipedia, the free encyclopedia
 
Btw, I see nothing special about the ML "Abyss" at all.

Me neither.

Listening threshold for low frequencies:

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Low Frequency Hearing Thresholds in Pressure Field and in Free Field
Toshio Watanabe and Henrik Moller
Journal of Low Frequency Noise and Vibration, Vol. 9 No. 3 1990
 

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The point is there is nothing special about it, essentially it's a tactile transducer.
If you raise the crossover point into the audio band and it also becomes a speaker.

A lot of people equate this physical sensation as the benchmark of "good bass".
It is not however high fidelity. It's big box store fidelity.

If it's small and rumbles, husband and wife may be more agreeable to purchase.

Mono sub equipped systems use significantly less materials to manufacture and ship as compared to a real stereo pair, hence the home theater-in-a-box.

Interestingly tactical transducers would require a mono feed.

From an audio enthusiast point of view, there is no need to go down that path. Why would you want to strive for a worse system.
It seems easier and more elegant to use a true stereo pair for reproduction of the audible spectrum.
 
With the setup I have, using multiple subs, for over 18 years, in my largish cathedral ceiling space, I sometimes find myself thinking "there's no bass in the music I'm hearing...hmmnn wonder if the sub amp is on". Then, another piece plays, and seemingly out of nowhere deep enveloping and tactile bass wells up rapidly and succinctly, then stops as fast as it started with no overhang or resonance. Almost scary.

But I usually cannot localize the source by sound alone, just like in a real life concert or event. Same punch on midbass in country, jazz, rock, you name it. System has 4 12" sonosubs of various configurations, and 6 woofers spread around strategically by measurement

Home theater is awesome.

I guess I've pretty well tamed the modal beast
 
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Interesting. Especially since I just got thru tweaking my crossovers (room change). Certainly 1 or 2 dB pulls the image off center. Not a lot, but enough to notice. Maybe about what was stated in the article. A slight delay will do the same, tho it sounds a bit different.
 
With the setup I have, using multiple subs, for over 18 years, in my largish cathedral ceiling space, I sometimes find myself thinking "there's no bass in the music I'm hearing...hmmnn wonder if the sub amp is on". Then, another piece plays, and seemingly out of nowhere deep enveloping and tactile bass wells up rapidly and succinctly, then stops as fast as it started with no overhang or resonance. Almost scary.

But I usually cannot localize the source by sound alone, just like in a real life concert or event. Same punch on midbass in country, jazz, rock, you name it. System has 4 12" sonosubs of various configurations, and 6 woofers spread around strategically by measurement

Home theater is awesome.

I guess I've pretty well tamed the modal beast

Nice sonic descriptors, Midas. Huge fan of cathedral ceilings too (grewup in a home like this :)

I'm in the camp of stereo bass/sub. Like Pano can sense direction of earthquakes, albeit not from California, but rather New Madrid (when I lived out that way). When the earthquake hit Haiti knew something bad was up. Here I have three neighbors from that catastrophe, still sending boat loads of needed items back (like a few hundred pairs of shoes for the kids to wear to school this fall). Haven't done much testing, ears tell me enough to know mono from stereo sub (once properly setup, impossible by ear). Must be a heightened sensitivity to phase. In a typical setup be it with stereo or mono subs, if the placement is not correct, feels like I'm being sucked (like a vacuum) to one side or the other. Dr. Geddes multi sub approach was tried out what seems like eons ago (20 or so) and was the best solution I've found to prevent this.
 
markus, while you say no gating or smoothing, it seems otherwise looking at the curve. what is the software, where was the mic WRT the speaker?

nothing more you want to say about the system? EQ? etc...

It's a near field sub. Used a PEQ to lift the low end. The waterfall shown above was generated in REW.

Currently I'm using a ripole sub but any sub should work if it can be placed close enough to the ears. The closer the sub the less room effects. Here's some measurements comparing a couple of far field and near field configurations:
Comparison of different near field and far field subwoofer configurations
 
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That's some good looking measurements Markus. You say that it's a near-field sub. How near? I remember a cool project over on Audio Circle a few years ago. It was a slot loaded sub that was right behind the sofa, near ear level. That allowed the builder to have plenty of bass - and not bother his neighbors. :)
 
That's some good looking measurements Markus. You say that it's a near-field sub. How near? I remember a cool project over on Audio Circle a few years ago. It was a slot loaded sub that was right behind the sofa, near ear level. That allowed the builder to have plenty of bass - and not bother his neighbors. :)

Currently I'm using a ripole sub because of its small form factor. Distance is about 40cm. The result is as you've said, loud, deep, detailed and mode-free bass at the listening position and virtually none of it a few feet away.
 
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