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   Home » Audio For Dummies ™ » Monophonic bass: myth and reality. (6 posts, 1 page)
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  »  New  Macondo Alternation. Extending the LF line-array..  Macondo and not only Macondo positioning...  Horn-Loaded Speakers Forum     8  106190  10-29-2005
  »  New  Macondo’s lowest channel...  The ULF amp Itch....  Horn-Loaded Speakers Forum     146  920658  09-15-2010
04-17-2011 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,495
Joined on 05-28-2004

Post #: 1
Post ID: 16086
Reply to: 16086
Monophonic bass: myth and reality.
fiogf49gjkf0d
Audio people are so accustomed with a comfortable believe that as frequency drops the stereo information becomes less important that no one seems question this old believe.  The reality is very much do not support this. From what I can observe the stereo information live in sound down to lowers frequency, you just need to know what to listen to “get” it.

I am ruining now my ULF channels at 20Hz with 3rd order- you understand that my ULF produce only very lowers bass. So, flipping the signal from mono to stereo and reversing the channels do produces very notable difference. What you listen my playback with mono bass then I have less complexity in Sound and Sound feel like a large wall with ornamentations. With Stereo bass the wall is replaced with animated and constantly changing fields, the clouds of Sound. Also, the “clouds” in stereo mode has capacity to softer right and left instruments of orchestra with different force.  So, say no to mono LF section regardless what kind topology and type you use. Remember, there are very few rules that you do not want to screw with: your LF much not be between your MF and your LF much not be mono.

Rgs,
Romy the Cat


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
04-19-2011 Post does not mapped to Knowledge Tree
ArmAlex
Iran
Posts 80
Joined on 02-15-2009

Post #: 2
Post ID: 16101
Reply to: 16086
Bass info
fiogf49gjkf0d
Dear Romy,Most of audiophiles listen to ported bass so there is no info left in LF to worry about.Best regards,Armen
12-19-2015 Post does not mapped to Knowledge Tree
Scott L
Posts 17
Joined on 02-26-2008

Post #: 3
Post ID: 22317
Reply to: 16101
Ported bass is alright, if correct
fiogf49gjkf0d
 ArmAlex wrote:
Dear Romy,Most of audiophiles listen to ported bass so there is no info left in LF to worry about.Best regards,Armen


Once again the misconception that any or all ported bass is evil and must be eliminated. This is simply not true. What is true, however, is that many or most all ported (vented) woofer systems have been done incorrectly.
12-19-2015 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,495
Joined on 05-28-2004

Post #: 4
Post ID: 22318
Reply to: 22317
Which one?
fiogf49gjkf0d
 Scott L wrote:

Once again the misconception that any or all ported bass is evil and must be eliminated. This is simply not true. What is true, however, is that many or most all ported (vented) woofer systems have been done incorrectly.
Scott, would you be kind to name a loudspeaker where is ported bass made properly from your point of view?


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
12-19-2015 Post does not mapped to Knowledge Tree
decoud
United Kingdom
Posts 240
Joined on 03-01-2008

Post #: 5
Post ID: 22320
Reply to: 16086
Physiology
fiogf49gjkf0d
That is given in the psychophysics: binaural phase offset sensitivity goes up with wavelength.
12-19-2015 Post does not mapped to Knowledge Tree
Scott L
Posts 17
Joined on 02-26-2008

Post #: 6
Post ID: 22322
Reply to: 22318
I do not think so but I am OK with it.
fiogf49gjkf0d
 Scott L wrote:
I had to take pause before I answered here; realizing in an almost shocking manner [that] I don't listen to many commercial loudspeakers. I am largely involved in the (gasp) DIY community, where it's also very often done incorrectly. My last very satisfactory retail loudspeaker experience was that of a B&W Matrix 801. Commercial audio peoples and audiophiles alike, tend to draw carved-in-stone conclusions from a very limited exposure, or experience. For example, "I hate horns". Yes, because person (Mr. A) once listened to one or two gawd awful horns and therefor concludes ALL horns must therefor[also] be awful. With respect to ported verses sealed systems, ported are indeed more  challenging to get correct; being lazy about paying attention to design/and/ construction details may easily lead to disaster. I should also include my finding here with experience in muti-way systems. A sub-woofer section may indeed be sealed, or vented; but I have obtained the very best results with a mid-bass section being sealed, where blended with either a vented, or, sealed sub bass. Never, ever in a billion years should there be an attempt on sub-woofing with an open baffle. Infinite baffle? Oh yes, but never an open baffle.
Scott, I understand where you are coming from. I was asking about commercial speakers because it is easy to find a common denominator when we TALK about. I do have in my mine a few models that I feel done more or less acceptable if they are driven with current-capable amplification. Still, they are acceptable to a point, to a point of reference….
 
I do not what is done better in DIY world. My personal DIY experience with ported bass was disasters but I was very little informed what I was doing. It is possible that you are right and proper DIY might breed something that best commercial loudspeakers can’t reach. I personally do not think so. The problem (as I see it) with port is not in the “paying [low] attention to design/and/ construction details” but rather a fundamental fault that factor into the idea of ported bass. I can describe it again (I did it somewhere before) but it is not the thread about ported bass.
 
I truly do not need to argue about it. If you feel that you with your practice have overridden everything that you do not like about ported bass then my salute to you. We truly do not need to be agree in our take regarding the ported bass capacity. 

Rgs, the Cat
Page 1 of 1 (6 items) Select Pages: 
   Target    Threads for related reading   Most recent post in related threads   Forum  Replies   Views   Started 
  »  New  Macondo Alternation. Extending the LF line-array..  Macondo and not only Macondo positioning...  Horn-Loaded Speakers Forum     8  106190  10-29-2005
  »  New  Macondo’s lowest channel...  The ULF amp Itch....  Horn-Loaded Speakers Forum     146  920658  09-15-2010
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