The history of the rear loaded horn? |
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TONY.A.S.S.
Old Croc Joined: 21 February 2007 Location: United Kingdom Status: Offline Points: 6878 |
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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.
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jacethebase
Old Croc Joined: 23 September 2009 Location: Somerset Status: Offline Points: 5697 |
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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! |
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www.wedding-production.co.uk
www.stage2sound.com |
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studio45
Old Croc Joined: 16 October 2007 Location: United Kingdom Status: Offline Points: 3863 |
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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.
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Studio45 - Repairs & Building Commotion Soundsystem -Mobile PA
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rich, ind.st
Young Croc Joined: 14 January 2005 Location: United Kingdom Status: Offline Points: 1096 |
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Funnily enough I re-loaded the imperials only last week, out next weekend if anyone fancies a listen...
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music is god
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Pinyorouk
Young Croc Joined: 31 January 2011 Status: Offline Points: 550 |
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Hi Rich, may you please post some pictures of the horn cabs. Thanks.
Edited by Pinyorouk - 19 April 2014 at 6:26pm |
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jbl_man
Moderator Group Joined: 12 January 2005 Location: London. Status: Offline Points: 11154 |
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What have you loaded them with Rich?
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Be seeing you.
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jazomir
Old Croc Joined: 20 November 2006 Location: Sunderland UK Status: Offline Points: 1710 |
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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 |
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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.
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Saturnus2
Registered User Joined: 17 February 2014 Status: Offline Points: 12 |
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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 |
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burningbush
Old Croc Joined: 25 May 2009 Location: Pictland Status: Offline Points: 5897 |
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Thanks Saturnus, really interesting. Have to find a picture of the man.
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music is the message
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burningbush
Old Croc Joined: 25 May 2009 Location: Pictland Status: Offline Points: 5897 |
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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. |
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music is the message
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Barniboy
New Member Joined: 08 November 2017 Location: DK Status: Offline Points: 1 |
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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 ? |
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Dub Specialist Sound
Old Croc Joined: 15 November 2013 Location: Smethwick Status: Offline Points: 4873 |
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Harking back to the Jenson too?
not sure what year tho
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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...
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