| Search | Login/Register
   Home » Audio For Dummies ™ » The realty of UHF and LF relation (2 posts, 1 page)
  Print Thread | 1st Post |  
Page 1 of 1 (2 items) Select Pages: 
   Target    Threads for related reading   Most recent post in related threads   Forum  Replies   Views   Started 
  »  New  Electro-Voice T350, T35, + Fostex tweeters...  TAD ET-703...  Horn-Loaded Speakers Forum     34  383151  04-28-2005
  »  New  The Active High Frequency Solution - AHFS..  Small problems with the camera lens can be mistaken for...  Playback Listening  Forum     5  39630  02-06-2008
10-17-2005 Post mapped to one branch of Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,540
Joined on 05-28-2004

Post #: 1
Post ID: 1538
Reply to: 1538
The realty of UHF and LF relation

It is commonly known about the relation between the ultra high frequencies and lowest frequencies. The extended reproduction of highest frequencies ”improves” the lowest octaves and makes perception more susceptible to bass. The phenomenon is well known. The countless reviewers and marketing heaters take advantage of this phenomenon and push to the audio consumers the ultra high frequency transducers that run well over 30kHz. Yes, by adding those super tweeters, if it done properly (a big rarity), the audio people go exuberant about their “new bass”. However, the reality of the things is slightly more complicated.

I always was suspicious regarding the validity of HF and LF relationship as it violates my decree about the unity of audio rules. People who follow my articles knows that I am a firm believer that a correct solution should not just address a specific problem or to serve a specific benefit but simultaneously fulfill a composite set of benefits plugging itself at once into multiple aspect of sound reproduction. If a solution does address juts one aspect then it is most likely was juts premature or incorrect solution.

So, while I do admit the LF benefit from using of UHF transducers I disagree with a necessity to reproduce anything linearly auditable over 13kHz: Beware of "Higher Frequencies Syndrome". So, form one prospective I do observe the UHF “help” and from another I find that UHF destroy Sound.

As the result of further thinking and listening I came across to a very interesting observations. I detected that the LF benefits that we have when we put the super tweeters into the game are in fact very faulty benefits. Yes, the bass become more defend and more firm. However, this bass become actually less musical and less realistic making essentially incorrectly reproduced bass. The UHF somehow modulates within our awareness the taste to “audio bass” and this bass has nothing to do with the acoustic bass or the original musicality. What actually happens with that UHF-helped-bass is that this bass somehow drive listening attention to itself. It has nothing to do with amplitude or with anything else manageable. It is in the character of the bass, the character reminds the bass of OTL amplifiers: always impressive but never musically rational or justifiable.  Listening this UHF-helped-bass I always feel strange as soon or later this bass “get” me, switching listening attention from consuming a content of musicality into the acknowledging and analyzing the reproductive affords of the audio chain.

So, get better bass for your playbacks by THE NATURAL WAYS and do not fertilize it with HF.  By staying away from the UHF tricks you will end up with 1) better HF 2) better bass. Well, you bass will not be “better” but it will be whatever you actually have before you “amalgamated” it with UHF….

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
03-15-2008 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,540
Joined on 05-28-2004

Post #: 2
Post ID: 6916
Reply to: 1538
About the LF and HF relation by Jim Lesurf.

Here is a wonderful article by Jim Lesurf expanding the phenomena of LF and HF relation.

http://www.audiomisc.co.uk/HFN/hearing/hearthis.html

Jim runs a site:

http://www.audiomisc.co.uk/

 that has  quite interesting content.

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
Page 1 of 1 (2 items) Select Pages: 
   Target    Threads for related reading   Most recent post in related threads   Forum  Replies   Views   Started 
  »  New  Electro-Voice T350, T35, + Fostex tweeters...  TAD ET-703...  Horn-Loaded Speakers Forum     34  383151  04-28-2005
  »  New  The Active High Frequency Solution - AHFS..  Small problems with the camera lens can be mistaken for...  Playback Listening  Forum     5  39630  02-06-2008
Home Page  |  Last 24Hours  | Search  |  SiteMap  | Questions or Problems | Copyright Note
The content of all messages within the Forums Copyright © by authors of the posts