Horn Speakers. |
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Bams
Young Croc Joined: 08 April 2009 Status: Offline Points: 622 |
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Completely offtopic but i remember seeing a photo of your rig during the mid-nineties and thinking that was the route Stage accompany should have taken instead of running their ribbon so low.
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Esc4pe
Registered User Joined: 08 August 2021 Location: England Status: Offline Points: 165 |
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Sorry to revive dead posts but I think I have 4 of these RCA shearer cabs, size isn’t a problem so we got them to try. They currently have old jbl in them but do you think it’s worth getting some modern drivers and which ones?
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bob4
Old Croc Joined: 29 February 2004 Location: Finland/Germany Status: Offline Points: 1842 |
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B&C 15DS115 , and see if they break apart or not
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Esc4pe
Registered User Joined: 08 August 2021 Location: England Status: Offline Points: 165 |
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They’ve been left outside for years and still seem in really good shape! Can’t speak for the internals though haha! I’ll post some feedback when I’ve got around to testing them either on here or a new thread
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Esc4pe
Registered User Joined: 08 August 2021 Location: England Status: Offline Points: 165 |
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Didn’t see those drivers before replying I’ve got some pd1550 to try if they will fit so will go with them first. If all is well may go with something along that route but think that may obliterate the old things
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toastyghost
The 10,000 Points Club Joined: 09 January 2007 Location: Manchester Status: Offline Points: 10920 |
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The Shearer horn was actually designed by Olson and Volkmann, and only Lansing used that name for them. They used a 12 dB per octave crossover, and should be a dual-15" re-entrant element if they're originals and genuine. The extra 'baffles' that attached at the sides and bottom make a big difference from the data I've seen. There's an excellent section on these and other developments of the period in the Horn book from Kolbrek and Dunker. Here's the measured frequency response of the original Shearer horn design, solid curve: If they could measure their designs in 1935, then surely people doing Hornresp models can measure theirs in 2021 |
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Esc4pe
Registered User Joined: 08 August 2021 Location: England Status: Offline Points: 165 |
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Sounds like I should really get some photos up to verify then. Mine are single 15 but look exactly the same as the cabs further up the thread but cut in half! Thank you for the useful information toasty!
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toastyghost
The 10,000 Points Club Joined: 09 January 2007 Location: Manchester Status: Offline Points: 10920 |
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A lot of folk made equivalents of the Shearer under license (or not) at the time. The RCA version by Lansing is the ‘original’. |
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Robbo
Old Croc Joined: 05 December 2005 Location: Shropshire Status: Offline Points: 4221 |
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Back in the seventies we used to sell brand new Altec 1215A cabinets in our shop in Wolverhampton---They looked like a standard W bin but they had a double fold inside with the 15" driver facing forward and they really did sound very good.
A few of the local DJs who had progressed to Transit sized vans bought them along with mids and HF horns and MM amp racks. They were 4ft high when stood up and only about 2ft deep and could easily give the punch of a Martin Audio 115 but went a fair bit deeper in frequency response. I bet there are still the odd pair kicking about in the Wolverhampton area to this day. |
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jbl_man
Moderator Group Joined: 12 January 2005 Location: London. Status: Offline Points: 11154 |
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I remember those John, lovely sounding, had the 421-8h driver, only 150w, but very efficient, so had plenty of grunt. Would have been expensive in the 70's, real hi-end back then.
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Be seeing you.
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Robbo
Old Croc Joined: 05 December 2005 Location: Shropshire Status: Offline Points: 4221 |
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Thats the one Ian---back then they were in a different class to most of the regular cabinets that were about and a lot of people were very surprised when hearing them---we always used a Crown DC300A to demo them hence the sweet bottom end.
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Contour
Young Croc Joined: 03 March 2004 Status: Offline Points: 620 |
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I would like to see a picture of the inside, how does this extra fold look like? And how do you acces the driver?
Edited by Contour - 29 October 2021 at 7:50pm |
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