H-PAS patent pending to Atlantic Technology - diyAudio
Go Back   Home > Forums > Loudspeakers > Subwoofers

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 12th July 2011, 03:03 AM   #1
jamikl is offline jamikl  Australia
diyAudio Member
 
Join Date: May 2005
Location: Melbourne
Default H-PAS patent pending to Atlantic Technology

I din't want to ask this question in the Holliman thread and disrupt it
but does anybody have any knowledge or experience of the system
in my heading to this thread. If its been around since 2009 there should
be some evidence of whether it works or is just hype by now.
jamikl
  Reply With Quote
Old 12th July 2011, 01:03 PM   #2
bjorno is offline bjorno  Sweden
diyAudio Member
 
Join Date: Mar 2005
Location: Jacobsmountain
Send a message via MSN to bjorno
Quote:
Originally Posted by jamikl View Post
I din't want to ask this question in the Holliman thread and disrupt it
but does anybody have any knowledge or experience of the system
in my heading to this thread. If its been around since 2009 there should
be some evidence of whether it works or is just hype by now.
jamikl
Hi, Read about the hyped speaker here:

Test Report: Atlantic Technology AT-1 H-PAS Speakers | Sound and Vision Magazine

Compare with this sub(insane but similar airways) suggestion (to be hidden in a small closet):

b
Attached Images
File Type: jpg VoltR3823_TL_Sections_Normal-versus Infra.JPG (689.8 KB, 422 views)
  Reply With Quote
Old 12th July 2011, 02:00 PM   #3
bjorno is offline bjorno  Sweden
diyAudio Member
 
Join Date: Mar 2005
Location: Jacobsmountain
Send a message via MSN to bjorno
FYI: Missed info.:The driver used in my simulation is the VoltR3823.

b
  Reply With Quote
Old 12th July 2011, 02:20 PM   #4
...truth seeker...
diyAudio Member
 
Ed LaFontaine's Avatar
 
Join Date: Feb 2004
Location: where the Appalachians rise from the Blue Grass
From recent posts to the Yahoo Quarter Wavelength Loudspeaker Design forum:

http://us.mg4.mail.yahoo.com/dc/laun...=8olo2qpop5bbg

//

There is a technology that is being released in commercial form that "may" approach what you describe.

http://www.gspr. com/atlantic/ hpas.html

Phil Clements was a judge and speaker at this year's MWAF

http://www.midwesta udiofest. com/index. php

Mr. Clements made mention of having "development" assistance from someone who frequents this forum...

//

http://www.stereoph ile.com/fsi2007/ 041507vivace/ index.html

http://www.6moons. com/audioreviews /gemmeaudio2/ vivace.html

http://www.stereomo jo.com/Gemme% 20Audio%20Vivace %20Speaker% 20Review/ GemmeVivaceSpeak erReviewA. htm

http://www.avguide. com/review/ gemme-audio- vivace-loudspeak er

http://www.tone. co.nz/reviews/ gemme-audio- vivace-floorstan ding-loudspeaker s-79

//

From Martin King:

"Atlantic Technology is using custom versions of my MathCad worksheets to
design the H-PAS enclosures. I wrote the worksheets for them and they are
doing all of the design work. Can't say much more."
  Reply With Quote
Old 12th July 2011, 02:31 PM   #5
...truth seeker...
diyAudio Member
 
Ed LaFontaine's Avatar
 
Join Date: Feb 2004
Location: where the Appalachians rise from the Blue Grass
At the end of the speaker judging competition, I spoke with Mr. Clements about the technology. He was engaging, however his conversation used terms which I did not find useful.

He knew he was in a group of people who design and build speakers.

His focus is the support and marketing of the technology through commercial efforts.

I don't expect he will let the "secret" out for awhile...
  Reply With Quote
Old 12th July 2011, 02:45 PM   #6
jbell is offline jbell  United States
diyAudio Member
 
Join Date: Apr 2003
Location: .
Isn't the 'secret' that it is just a TL, but with a 'jug' that resonates and adds like the holliman, and not as a helmholtz that reduces?

quote: "that serves to null the unwanted primary resonances of the main line." kinda sounds iffy to me...
  Reply With Quote
Old 12th July 2011, 03:13 PM   #7
Boden is offline Boden  Netherlands
diyAudio Member
 
Join Date: Mar 2010
After 40 years interest in building loudspeakers and reading everything available. I am -sorry to say again- totally unimpressed. I cannot recall how often I have read about "modified" TLS concepts. Usually there is very little new under the sun..

The German magazine "Klang und Ton" pioneered TLS systems with an internal Helmholtz resonator to absorb the nulls in the line, effecitively flattening the response above, say, 80 Hz.

And now this..Furthermore the whole idea seems to carry shades of a rather unique design of the early eighties by an American company called Phase Research. No Prior Art, as required for a patent, I have my doubts.
Transmission Line speaker design has always been surrounded by all sorts of mysticism. Have built half a dozen, I can only say there is no magic to them, other then ending up with a pretty large speaker.

One of the great insights recent literature (Toole, Welti, Geddes, Double Bass Array et al.) has given is that proper room placement (maybe plus optional Digital Room Correction) is far more important than any particular woofer loading technique.

My five cents.

Eelco
  Reply With Quote
Old 12th July 2011, 04:20 PM   #8
Zero D is offline Zero D  United Kingdom
diyAudio Member
 
Join Date: Aug 2009
@ jamikl

Thanks for posting about this as i hadn't heard of it before

Also thanks to those that have provided more info/links etc Here's some from me.

Phil Clements, originally of Phase Research, invented the basic concept about thirty years ago. So once again it seems not much is new ! What interests me the most, is the claim of inverse rolloff below fs to f3.

Quote:
R-HD Compression Line Bass Filter" (patented)

New Page 1
Quote:
Hello:

My name is Philip Clements, Inventor of “H-PAS” loudspeaker technology, the future of sound and loudspeaker sound reproduction technology, today. If one of your passions in life includes listening to and being moved by good music and/or enjoying great home theater video and sound, you will probably be hearing and reading a great deal about “H-PAS”, patent pending. Google “H-PAS” speaker technology even today and you will probably get a quarter million hits on just its beginning over the past year. The following descriptions and information are offered to those with interest in hopes of providing a little greater understanding of what the technology is, what it does to enhance sound enjoyment, and what it means for almost all the sound applications and uses of sound we enjoy today and will in the future.

New Page 2
*

See an animation of the design http://www.atlantictechnology.com/Up...tion_final.swf
Attached Images
File Type: gif H-PAS.gif (37.5 KB, 352 views)
  Reply With Quote
Old 13th July 2011, 06:16 AM   #9
jamikl is offline jamikl  Australia
diyAudio Member
 
Join Date: May 2005
Location: Melbourne
Thanks for the replies and links, some of which I have seen.. It seems to
have been around as a [product since 2009 but it does not seem to have shattered the earth in any way which is why I would like to get beyond the hype
and find out if there is anything there. Just like the Holliman I guess that there are those who believe and those who don't. What seems to separate this from the Holliman is that the H-Pas may be in production.

Have you tried the second one out bjorno?

I took it the other way jbell, that the "jug" is an absorber to smooth the line resonances or harmonics but I don't know much
jamikl

Last edited by jamikl; 13th July 2011 at 06:21 AM.
  Reply With Quote
Old 13th July 2011, 06:45 AM   #10
jamikl is offline jamikl  Australia
diyAudio Member
 
Join Date: May 2005
Location: Melbourne
The enclosure looks like a normal reverse tapered TL. I can't see
how it any different so his explanation on the link New Page 2 should
apply to any such TL if he is right. The "jug" appears to be at one
fifth of the line length, maybe one third even, and the speakers
at the end. The "jug" is where you might mount the speakers
in another design, although this would normally be done at the
end of the first fifth (third) rather than the last fifth(third). At
such low frequencies do the fundamental waves see the jug as
anything but an extension of the line?
jamikl

Last edited by jamikl; 13th July 2011 at 06:48 AM.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Interesting tube on e-bay for trans atlantic cable dshortt9 Tubes / Valves 10 20th June 2011 11:19 AM
Klayman patent # 5177329 - tapped horn technology? heyday Subwoofers 4 22nd March 2010 04:13 AM
Patent pending? InclinedPlane Full Range 10 29th March 2009 08:08 PM
Modulating a CCS - Pending WIKI inclusion keantoken Everything Else 5 3rd August 2008 08:52 AM


New To Site? Need Help?

All times are GMT. The time now is 05:14 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2