15" Scoop like rectangular Tannoy G.R.F |
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Zeno
Registered User Joined: 03 February 2015 Location: MUC Status: Offline Points: 28 |
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Posted: 26 February 2015 at 10:29pm |
I am looking for an 15" scoop with the performance like the Tannoy G.R.F cornerhorn. There exists the rectangular G.R.F but I doubt that this one delivers the same response like the corner version. I had the corner G.R.F horns and even without standing in a corner the performance was quite impressive. Problem with the corner version, they are unpratical for PA applications. A scoop would have much better handling and transport. I would use them up to 400 Hz or better 500 Hz. This would give me the option to have an easy to install full hornloaded system for small venue with some adequate bass perfomance. At this time this system looks like you can see on the picture
The bass is a reflex enclousure with Beyma 15 G 400. Crossover for small venue is 400 Hz. Thank you for some nice scoop suggestion! Zeno |
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Hemisphere
Old Croc Joined: 21 April 2008 Status: Offline Points: 2272 |
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You do not want to use a scoop up to 400 let alone 500Hz (even 200 is higher than most people will run them)
Just because they can output that frequency band doesn't mean they'll sound good, and you'll have a big efficiency dip at that level. Reflex makes so much more sense. Even a small tapped horn might beat a scoop at 400Hz if efficiency is paramount but anything other than a reflex will struggle. If you want to use horns you need a dedicated kick cabinet for 150-400 really, then you'll get the efficiency you want plus the benefit of another driver on the task will give the system more impact in general. 2x 15" reflex or 1x15" tapped horn + 12" straight kick horn would be a safe bet. Double reflex maybe preferable as you could split it and use one or two depending on application.
Edited by Hemisphere - 26 February 2015 at 11:02pm |
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guitarplayerjoe
Registered User Joined: 31 August 2011 Location: Manchester Status: Offline Points: 194 |
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Like Hemisphere says, I'd consider a different design to a scoop if you plan to run them so high. Most people I know cross theirs over around 80Hz due to the phase problems from the delay of the horn... How about something like a folded horn?
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valve head777
Old Croc Joined: 27 July 2012 Location: East Sussex Status: Offline Points: 1780 |
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theres nothing wrong with running that high in a scoop! Fane designed the 15 inch scoop to play mid as well as bass, which is what their 12 inch scoop was also designed for. The factor you need to look at is which driver. most 'sub' drivers will not be good above 200hz. Tannoy designed their drivers (dual concentric) to be full range. but if you get a 15 that will happily go up as far as 500hz, you'll probably find it is not optimised for sub.
Respect
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Freedom of choice, choice of freedom.
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Zeno
Registered User Joined: 03 February 2015 Location: MUC Status: Offline Points: 28 |
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Thank you for the details!
Do you mean a frontloaded horn with folded horn? Mhh, I also thougt about this. F1 use a frontloaded horn up to 470Hz if I have seen this wright (RES4 I think) but just for the kick, not for sub. Or EV, if my information is correct they offerd the old eleminator even as a fullrange version. The mf horn was the 8HD and cuttoff is 600Hz. Maybe I open another thread and looking for a frontloaded horn which can provide some bass and plays up to 400 or 500 Hz. But the G.R.F was not bad, at this time I had no equipment to messure the dip. Zeno |
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Meat
Old Croc Joined: 05 June 2009 Location: Manc Status: Offline Points: 1514 |
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Jensen Imperial maybe? Mate of mine ran those all the way up to meet hornloaded 8s at one point and it certainly didn't sound bad. Dunno what frequencies he was crossing at but it was much higher than any of the standard advice you'd get would have you believe.
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Don't test the champignon sound
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rich, ind.st
Young Croc Joined: 14 January 2005 Location: United Kingdom Status: Offline Points: 1096 |
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Was about to mention the imperials:) played them upto 500, sounded fine. Have used them as ghetto monitors loaded with a pd1550 and piezo, not amazing but passable.
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music is god
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flinnt45
Registered User Joined: 30 April 2013 Location: london Status: Offline Points: 111 |
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Hey Zeno
You probably already know this Tannoy claim identical electrical characteristics between the corner and rectangular cabinets, I have built this cab myself, its fine in standard form with a 50 watt Tannoy gold driver, but with a 500 watt PA driver-The EV,EVX 15 is installed in the cab now it will require substantial upgrade with regard to bracing as the rear panel vibrates like hell, bracing cured it, it still suffers from response dip like a scoop, a better cab would be the Jensen imperial which has good output up to 500HZ, it was designed this way, |
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Maarty
Registered User Joined: 24 May 2007 Status: Offline Points: 151 |
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Zeno
Registered User Joined: 03 February 2015 Location: MUC Status: Offline Points: 28 |
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Hello and thank you very much for this helpful details!
I didn`t know the imperails, they look very useful for my application! In the G.R.F I first mounted the gold monitor, then the K3808 and after this I build a "big bore" version with a Beyma 18GT200, 18G480 and then the PD186. And yes, it was neccesary to stabilize them for the power of the 18" speakers. Maarty, your cabinet looks fine! Would be also very good for my application or for my "triax" speaker (PAS 2580C with BMS Coax) Is it possible to see the plans? Zeno |
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Maarty
Registered User Joined: 24 May 2007 Status: Offline Points: 151 |
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Maarty
Registered User Joined: 24 May 2007 Status: Offline Points: 151 |
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