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Old 20th May 2014, 08:13 AM   #1
AndrewT is online now AndrewT  Scotland
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Default The 1929 Denman Horn lives on

Just saw the BBC news item on the Denman Horn.
Built in 1929, damaged during building work in the late 1940s.
Has been refurbished and giving demonstrations.
Claimed to be 50% efficient @ 27' long, exponential and appears to be a full range speaker.
1 and 1/16" throat, 7'1" square mouth (~4.66sqm)

http://www.sciencemuseum.org.uk/abou...al%20Horn.aspx
http://thequietus.com/articles/14983...ponential-horn
http://www.stuff.tv/history-s-greate...siness/feature
http://blog.soundandmusic.org/2014/0...n-loudspeaker/

Re-newed my interest in completing my loft mounted bass horn. It too is 28' long but with a big bass driver, rather than a small compression driver.
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Last edited by AndrewT; 20th May 2014 at 10:34 AM.
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Old 20th May 2014, 10:07 AM   #2
xrk971 is online now xrk971  United States
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That article is too much text and no pictures - the museum website wasn't much either.
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Old 20th May 2014, 10:10 AM   #3
AndrewT is online now AndrewT  Scotland
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I wonder if the BBC has a video clip of the news item?
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Old 20th May 2014, 10:16 AM   #4
xrk971 is online now xrk971  United States
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Google is your friend. Much better to see in video.

BBC News - Giant Denman Horn goes on display at Science Museum
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Old 20th May 2014, 11:00 AM   #5
Zero D is offline Zero D  United Kingdom
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You could stick your horn 20' out of your roof, as Roderick Denman did History?s greatest loudspeaker is back in business | Stuff

Interesting rebuild, but i doubt if it's full range ? Back in the 30's i wouldn't have thought they had any decent mic's or source material to feed it either ? Still it might be worth a visit/listen !
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Old 20th May 2014, 11:05 AM   #6
xrk971 is online now xrk971  United States
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I wonder if the CD they are using for the exhibit is the original 1929 driver or is it one of the modern full range CD's. I agree with ZeroD that they probably did not have full range mics back then.

Last edited by xrk971; 20th May 2014 at 11:09 AM.
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Old 20th May 2014, 11:27 AM   #7
Zero D is offline Zero D  United Kingdom
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Yeah i also wondered what CD they are using ? Maybe we can find out If they are using the/an original, after all these years we won't hear it as it "could" have been, or with a modern CD. But non the less an interesting & rare exercise that won't come along very often !
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Old 20th May 2014, 09:11 PM   #8
memsman is offline memsman  United States
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Western Electric started making and selling condenser microphones in the early 1920's with frequency ranges of ~50Hz to ~17kHz. So in theory it's possible they could have picked up near full range back in the day. Not sure about recording and driving a CD though.
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Old 21st May 2014, 04:23 AM   #9
Zero D is offline Zero D  United Kingdom
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That's a Very good fr for the 20's As for recording & playback, well that's a different matter ! Having heard "music" recordings & film audio from the 30's & 40's, the quality was far from HiFi Maybe live they sound ok ?
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