Anyone one seen these before? |
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dlyxover
Old Croc Joined: 14 June 2007 Location: Liverpool Status: Offline Points: 1508 |
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Posted: 21 July 2017 at 12:22pm |
Anyone seen these before?
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In the Truth there is no news, and in the News there is no truth
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madboffin
Old Croc Joined: 03 July 2009 Location: Milton Keynes Status: Offline Points: 1537 |
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It looks a lot like a JBL 4660. The original "differential dispersion horn" design, later adopted by various other manufacturers.
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_djk_
Old Croc Joined: 23 November 2004 Location: United States Status: Offline Points: 6002 |
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I own a pair (in black).
Horn also used in the original Everest. |
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djk
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dylan-penguinmedia
Old Croc Joined: 14 April 2011 Location: Brighton Status: Offline Points: 4576 |
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^^ Holy shit look at those bad boys!
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all bass
Old Croc Joined: 11 October 2012 Location: the Netherlands Status: Offline Points: 1855 |
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Drool... |
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https://www.instagram.com/my_modular_journey/
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jbl_man
Moderator Group Joined: 12 January 2005 Location: London. Status: Offline Points: 11154 |
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Biblically expensive when new...and still worth fortunes today.
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Be seeing you.
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Hemisphere
Old Croc Joined: 21 April 2008 Status: Offline Points: 2272 |
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Darth Vader's home hifi.
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_djk_
Old Croc Joined: 23 November 2004 Location: United States Status: Offline Points: 6002 |
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The woofer is a 150-4H, a variant of the E145 (underhung coil), 077 (2405) tweeter, and a 2426 compression driver on that wild horn.
Some have been able to upgrade the mid horn to a 1.5" throat, allowing the use of a Be driver (2435). I bought four E145 woofers and was thinking of making a right-angle plenum and mounting the drivers push-pull (for lowest distortion). One of my donor 4660 horns came out of a church install where it had fallen (fortunately not killing anyone). The 4660 usually had the 2225 woofer. Edited by _djk_ - 22 July 2017 at 9:00pm |
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djk
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JonB67
Young Croc Joined: 22 April 2016 Location: UK Status: Offline Points: 1376 |
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whats the advantage of the asymmetric horn? Presumably better distribution in which case why arent they more common?
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matty w
Young Croc Joined: 27 August 2008 Status: Offline Points: 798 |
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So how good do they sound ? What's the verdict djk ??
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Black to black , red to red , blue to bits ....
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tv00
Old Croc Joined: 10 August 2009 Location: Denmark Status: Offline Points: 1886 |
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Whow I get seasick from that top picture, could you please turn it :-)
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www.facebook.com/babysoundsystem
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madboffin
Old Croc Joined: 03 July 2009 Location: Milton Keynes Status: Offline Points: 1537 |
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If you look carefully at one of these horns you will see that at one end, it looks like a short, wide dispersion horn. Whilst at the other end, it looks like a long, narrow dispersion horn. The profile gradually changes from one to the other. The 4660 was originally developed to give even coverage of a room from a position on the ceiling near the front wall. The wide angle end of the horn is aimed downwards at the front rows of seats and the coverage gradually gets narrower as you go further back in the the room, keeping the sound level reasonably constant at floor level. It was very innovative at the time and I'm sure JBL wrote a technical paper with a full description, try a Google search for it. A few other manufacturers have used the same technique. The first was probably Martin Audio in the early 1990's with the LE700 wedge monitor. In that system the wide coverage was at the top, for a musician very close to the the monitor, and the narrow coverage at the bottom. The result is that as you go further upstage (away from the wedge) the HF level doesn't change very much and the horizontal coverage remains fairly narrow so the monitor covers a well defined section of the stage. EAW were also an early adopter with some of their installation products. Martin still make extensive use of these horn designs and it's one reason why the DD6 is such a useful box for Speaker On Stick, Frontfill, and Mini Wedge applications. You can turn the horn round, without the use of tools, depending on how the speaker is to be used. |
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