Products

1. Meyer Sound Products
1. PSW-6 : High-Power Cardioid Subwoofer (one of the first off the shelf product directional subwoofer I became aware of) it has two 18 inch and four 15 inch woofers – two of the 15 inch woofers face the back:
1. Meyer PSW-6 Product Page 
2. Meyer Successfully Tests Unique Cardioid Subwoofer Design
3. PSW-6 DataSheet
4. PSW-6: The First Directional Subwoofer in History
2. M3D-Sub : Directional Subwoofer – Meyer’s dual 18 inch front facing and dual 15 inch rear facing touring subwoofer:
1. Meyer M3D Product Page
2. M3D data Sheet

General Articles

http://www.doctorproaudio.com/doctor/cajondesastre/pdfs/Downloaded_from_Doctor_ProAudio_com-SettingUp_cardioid-Joan_La_Roda-DAS_Audio.pdf

Seems like all the rage but not everyone thinks so:

Check out this discussion:  (http://forum.speakerplans.com/how-tocardioid-sub-arrays_topic26007.html)

“For sub-bass control I’m not convinced there is any advantage over just pointing all the subs forward & forming a wide horizontal array, in most circumstances.  I try to induce as much diffraction directivity as possible & then the radiation pattern tends to be cardioid shaped anyway.”

“I do have and use Q-Subs and S2 cabs. The CSA method does work to some extend, but you need more gear ( cabs and amps ) to end up with less SPL than straightforward non-CSA. I tried it several times in various venues from very small to rather big and from my experience it’s a small benefit at best at the cost of more gear. The feeling creeps on me that it’s a marketting ploy to sell more gear because they ( not only D&B ) convinced you bass splill at the rear is THE BIG problem. But is rear spill really that big a problem ? I admid it can be in some cases, but an environmental problem primarly in open air gigs. Every time I used it, musicians start complaining”

The best I have seen on this topic is:
Phase Wavelengths: The End Fire Cardioid Array made visible

http://bobmccarthy.wordpress.com/2010/01/27/cardioid-subwoofers/

http://svconline.com/mag/avinstall_bass_not/

More at: http://srforums.prosoundweb.com/index.php/t/44778/7154/

and  Dave`s blog for his take on it…
http://ratsound.com/blognav.htm
Highly informative and some intriguing questions?

More! you ask check these out:

• Rear delay array : http://en.wikipedia.org/wiki/Subwoofer#Directional_bass
• EV’s – Subwoofer Arrays - A Practical Guide “great basic info” kpb – http://www.meyersound.com/news/1998/psw-6_test/
• AES PNW Section Meeting Report - A Cardioid Subwoofer Array – Theory vs. Practice - with Dan Mortensen – http://www.aes.org/sections/pnw/pnwrecaps/2009/aug09_subs/
• Tech Talk: Building Directional Subwoofer Arrays http://www.prosoundweb.com/article/tech_talk_building_directional_subwoofer_arrays/
• Cardioid Subwoofer Array 80 http://polarfocus.com/pub/Cardioid%20Subwoofer%2080.pdf
• Application Guide Spaced SB210 FSA Forward Steered Low-Bass Array- Jan/04 – Rick Kamlet -http://www.jblpro.com/catalog/support/getfile.aspx?doctype=3&docid=234
• 
  
• Meyer Successfully Tests Unique Cardioid Subwoofer Design “I credit the the work Meyer did to develop and promote Cardioid subs as critical to them becoming popular” kpb  - http://www.meyersound.com/news/1998/psw-6_test/
• d&b Audio: http://www.dbaudio.com/en/systems/qi_series/qi_csa/
• The B4-SUB realises d&b audiotechnik’s patented design of a unique cardioid technique using only one amplifier channel, following on from the introduction of CSA (cardioid subwoofer array) techniques – http://www.tpimagazine.com/News/344415/the_db_audiotechnik_b4sub_creates_the_new_cardioid_chapter.html
• The Next Cardioid Chapter, The D&B Audiotechnik B4-SUB – http://www.techietalk.co.uk/news/cardioid-chapter-db-audiotechnik-b4sub/
• Bass Here, Not There - Sep 1, 2004 12:00 PM, By Bruce Borgerson - and it covers the EAW TD stuff we did with Kenton, and Craig Jazen from Acoustic Dimensions a ways back before anyone was talking about directional subs – http://svconline.com/mag/avinstall_bass_not/
• And you must check out: http://www.acousticdimensions.com/tools/dipolecardioid.htm
• A Concise Article on Cardioid Subwoofer Arrays – by Steve Bush http://bobmccarthy.wordpress.com/2010/03/25/a-concise-article-on-cardioid-subwoofer-arrays-by-steve-bush/

Now there are clearly four broad phases in Apple’s history all with their own relative strengths and weaknesses when it comes to both product innovation along with their capability to successfully establish a new category of product:

1. “Inventing the Consumer PC market years”
   

   Apple IIc with LCD Screen (actually for the next time phase but from the pre-Mac team)

2. “Creating the WIMP Interface PC market years”
3. “The non Steve years”
   

   The Newton way before it's time – and soup the data base it ran is still ahead of what we have today

   

   One of the most dramatic forward looking form factor computers again way before it's time. Foreshadows the iMac

Apple's Newton family had later versions that foreshadowed much

1. “The Steve is back years”

Some products to look at:

By Joseph Palenchar — TWICE, August 6, 2009

Stamford, Conn. – Harman International will be the title sponsor of a new music-oriented TV, online and in-flight series produced in cooperation with National Geographic and other broadcast partners.

The Music Nomad series will feature live and in-studio performances as well as artist interviews across several continents to explore diverse music genres, the company said. The upcoming series will be hosted by Jacob Edgar, a leading international music producer and CEO of the independent record label Cumbancha. For the series, the ethnomusicologist traveled the globe to seek out exceptional songs and musical talent, Harman said.

The new series will air in November on the Nat Geo Music and Nat Geo Adventure channels in cooperation with various cable and satellite providers. Nat Geo Music is a 24-hour music channel that debuted in 2007 and is available in Latin America, parts of Europe and Africa. Nat Geo Adventure is available in about 40 countries outside the U.S.

via Harman To Sponsor Music-Oriented TV Series – 2009-08-06 12:59:16 EDT | TWICE.

Should be interesting both to see what they come up with and how useful moving beyond traditional MI / Pro audio media works.