Speakerplans.com Homepage
Forum Home Forum Home > General > General Forum
  New Posts New Posts RSS Feed - The history of the rear loaded horn?
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

The history of the rear loaded horn?

 Post Reply Post Reply Page  <123>
Author
Message
TONY.A.S.S. View Drop Down
Old Croc
Old Croc


Joined: 21 February 2007
Location: United Kingdom
Status: Offline
Points: 6878
Post Options Post Options   Thanks (0) Thanks(0)   Quote TONY.A.S.S. Quote  Post ReplyReply Direct Link To This Post Posted: 19 April 2014 at 2:47pm
That picture appears in one of my Text books, and the first edition was 1948, so pretty old. As said previously there are some old Rear Horn Loaded cabs lurking about. It must have been quite exciting to discover that you could get more out of the speaker by using the back as well as the front of the cone.
Back to Top
jacethebase View Drop Down
Old Croc
Old Croc
Avatar

Joined: 23 September 2009
Location: Somerset
Status: Offline
Points: 5697
Post Options Post Options   Thanks (0) Thanks(0)   Quote jacethebase Quote  Post ReplyReply Direct Link To This Post Posted: 19 April 2014 at 3:24pm
Originally posted by MarjanM MarjanM wrote:

Jace those are not backloaded horns.


My bad! I'm learning more and more about the different types of boxes. So used to just using production boxes.

Hoping to have a go at building my first box sometime this summer!
www.wedding-production.co.uk

www.stage2sound.com
Back to Top
studio45 View Drop Down
Old Croc
Old Croc
Avatar

Joined: 16 October 2007
Location: United Kingdom
Status: Offline
Points: 3863
Post Options Post Options   Thanks (0) Thanks(0)   Quote studio45 Quote  Post ReplyReply Direct Link To This Post Posted: 19 April 2014 at 3:45pm
Jensen Imperial from 1956 was another very early design. Has really huge chamber by today's standards, like 75-100 litres per driver at a guess, and stands six feet tall by almost four wide in the original double 15 version. Will wring very low, very high fidelity bass from almost any speaker, speaker's capabilities seem to define only the maximum achievable output rather than frequency response. You can mount a 100 watt 6" in there on a baffle adaptor plate, and it WILL astonish you.
rich ind. st. built a set of six 15" singles, and they can hold their own in terms of output with any modern bin, and could surpass most for fidelity. He actually managed to move them around successfully, with midtops and amps, in an LDV Convoy, really a very small van. They're still about but not now part his main rig.
Studio45 - Repairs & Building Commotion Soundsystem -Mobile PA
Back to Top
rich, ind.st View Drop Down
Young Croc
Young Croc
Avatar

Joined: 14 January 2005
Location: United Kingdom
Status: Offline
Points: 1096
Post Options Post Options   Thanks (0) Thanks(0)   Quote rich, ind.st Quote  Post ReplyReply Direct Link To This Post Posted: 19 April 2014 at 5:37pm
Funnily enough I re-loaded the imperials only last week, out next weekend if anyone fancies a listen... 




music is god
Back to Top
Pinyorouk View Drop Down
Young Croc
Young Croc


Joined: 31 January 2011
Status: Offline
Points: 550
Post Options Post Options   Thanks (0) Thanks(0)   Quote Pinyorouk Quote  Post ReplyReply Direct Link To This Post Posted: 19 April 2014 at 6:25pm
Hi Rich, may you please post some pictures of the horn cabs. Thanks.

Edited by Pinyorouk - 19 April 2014 at 6:26pm
Back to Top
jbl_man View Drop Down
Moderator Group
Moderator Group
Avatar

Joined: 12 January 2005
Location: London.
Status: Offline
Points: 11154
Post Options Post Options   Thanks (0) Thanks(0)   Quote jbl_man Quote  Post ReplyReply Direct Link To This Post Posted: 19 April 2014 at 6:38pm
What have you loaded them with Rich?
Be seeing you.
Back to Top
jazomir View Drop Down
Old Croc
Old Croc


Joined: 20 November 2006
Location: Sunderland UK
Status: Offline
Points: 1710
Post Options Post Options   Thanks (0) Thanks(0)   Quote jazomir Quote  Post ReplyReply Direct Link To This Post Posted: 20 April 2014 at 9:38am
Hmmm, tried "horn loaded speaker" and "rear horn loaded speaker" image search in Guggle - and some very interesting stuff popped up (lot of stuff looks like it's paid advertising by Chinese knock-offs, though). I shall now be sat here all day (albeit with a nice cold bottle of Sauvignon Blanc, later) 'researching' the subject. I may be gone some time!

I've fallen in love with the Tannoy Autograph (oh, and the Autograph Professional with the extra 15" driver). An absolute thing of beauty. Also found some plans for a scoop with a folded primary rear loading - I shall post links/pics later. 

After a good search while eating my porridge - there isn't a huge amount of vinatge stuff that is rear loaded, so it may be that the 4530 was the earliest commercially available horn.

Found this beast - front and rear loaded 2 way from Blumenhofer (no, I haven't either)



I think the Voigt theory might be correct - Lowther used rear loaded cabs designed by Voigt from year dot, but the earliest RLH speakers I can find reference to (other than Voigt clones) are the Ampex cinema speakers models 5030/5050 which are part of the Todd AO range deigned by Lansing's team as the C55/C43 speakers and the forerunners of the 4330/4350 JBL cabs. The originals were designed by Bill Thomas and Bart Locanthi and were loaded loaded with 375 bass drivers with the large cab having a 537 HF driver/500 horn lens and the smaller one a 175DH horn/driver.




Edited by jazomir - 20 April 2014 at 11:52am
For sidefills, can we have two enormous things of a type that might be venerated as Gods by the inhabitants of Easter Island, capable of reaching volumes that would make Beelzebub soil his pants.
Back to Top
Saturnus2 View Drop Down
Registered User
Registered User


Joined: 17 February 2014
Status: Offline
Points: 12
Post Options Post Options   Thanks (0) Thanks(0)   Quote Saturnus2 Quote  Post ReplyReply Direct Link To This Post Posted: 20 April 2014 at 11:26am
Originally posted by jazomir jazomir wrote:

After a good search while eating my porridge - there isn't a huge amount of vinatge stuff that is rear loaded, so it may be that the 4530 was the earliest commercially available horn.

Still no. It's still the Voigt horns in any of it's incarnation that was the first commercially available back loaded horns. The reason that everyone else, like the JBLs, came so many years later was that Paul Voigt had patented it all in his 1933-1934 suite of 32 patents relating to horn speakers and horn speaker principles. And thus everyone else was barred from making any unless under license for 13 years thereafter (prior to 1955 patent life time was usually 13 years).

That is also the reason the first text books that describes the principle in any real detail is from 1947-1948.


Edited by Saturnus2 - 20 April 2014 at 11:31am
Back to Top
burningbush View Drop Down
Old Croc
Old Croc
Avatar

Joined: 25 May 2009
Location: Pictland
Status: Offline
Points: 5897
Post Options Post Options   Thanks (0) Thanks(0)   Quote burningbush Quote  Post ReplyReply Direct Link To This Post Posted: 21 April 2014 at 2:26pm
Thanks Saturnus, really interesting. Have to find a picture of the man.
music is the message
Back to Top
burningbush View Drop Down
Old Croc
Old Croc
Avatar

Joined: 25 May 2009
Location: Pictland
Status: Offline
Points: 5897
Post Options Post Options   Thanks (0) Thanks(0)   Quote burningbush Quote  Post ReplyReply Direct Link To This Post Posted: 21 April 2014 at 2:32pm


Business recovery was slow, a bankrupt and rationed nation had no need for expensive consumer products and when he injured his back (his main loudspeaker weighed about 70lbs), he concluded that it was time to move on to Canada and set up his business where they didn't have a socialist government that would control and limit his top quality home entertainment products! He decided in 1950 to sell up (by a hand-shake agreement) to Lowther in Bromley, a trade partner, who continued to develop his loudspeakers and eventually market them successfully to an exclusive and very selective clientele.
music is the message
Back to Top
Barniboy View Drop Down
New Member
New Member


Joined: 08 November 2017
Location: DK
Status: Offline
Points: 1
Post Options Post Options   Thanks (0) Thanks(0)   Quote Barniboy Quote  Post ReplyReply Direct Link To This Post Posted: 08 November 2017 at 9:08am
For Saturnus:
I am interested in your illustration of the Voigt Home Constructors Horn with the optional added bass chamber (rear loading, if you like).
I have collected Voigt documents out of personal interest for many years, and I have a copy of the blueprint for the HC horn. 
However, I dont remember to have seen that particular illustration, which clearly seems to be by mr. Voigt himself.
May I ask where you got it from ?

Back to Top
Dub Specialist Sound View Drop Down
Old Croc
Old Croc
Avatar

Joined: 15 November 2013
Location: Smethwick
Status: Offline
Points: 4873
Post Options Post Options   Thanks (0) Thanks(0)   Quote Dub Specialist Sound Quote  Post ReplyReply Direct Link To This Post Posted: 08 November 2017 at 11:39am
Harking back to the Jenson too?

not sure what year tho
Musical Roots Reggae Vibration is Life! for music is sound...sound is vibration...vibration is energy... and energy begets life. Therein lies my passion!...MUSIC IS LIFE...
Back to Top
 Post Reply Post Reply Page  <123>

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.06
Copyright ©2001-2023 Web Wiz Ltd.

This page was generated in 0.105 seconds.