24" driver in horn? |
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roborg
Registered User Joined: 05 July 2004 Location: United Kingdom Status: Offline Points: 1026 |
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Posted: 15 January 2008 at 9:38pm |
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personally i sort of like big drivers in short horns. Biggest i'll ever put in one is an 18, and probably not again (unless some1 pays me to do it )
For new designs & cabinets I'm totally a small driver convert. I got one 4x12" at the mo & i'll have 3 more soon ;) Edited by roborg - 15 January 2008 at 9:39pm |
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What I cannot create, I do not understand
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Mark James
Old Croc Joined: 15 January 2006 Location: rig side Status: Offline Points: 5309 |
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as demonstrated by the lab horn, its a 2x12 with the 2 12s designed to closely replicate the 18/21/24 etc..........
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me so horny me love you long throw
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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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I think there is a lot to be said for small horn drivers as apposed to large ones. If you multiply the small drivers to give you the same area as a large one, as long as they go low enough in the begining, it's possble you would get a more accurate sound due to a quicker speed response and also larger power handling. A 4x12 horn is not hard to do and is nothing new. EAW have had on for ages. Perhaps small is bigger.
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Disco Stu
Old Croc Joined: 03 March 2005 Location: United Kingdom Status: Offline Points: 2487 |
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Depends what you want from a system I have 3 main points
1) How low do you want the system to go - going low requires a large horn mouth, and a larger driver means a larger expansion for a lower compression ratio otherwise you are going to destroy the driver in seconds. A 24" driver and a long horn with a large cross sectional area is going to be ridiculously large and will still have only the powerhandling of at most 2x12 and more power compression since the voice coil is usually only slightly larger than an 18" 2) How much bandwidth do you want to try and force out of the system - a larger driver means a larger amount of air to move which makes them poorer at the transients than a smaller driver, unless they have a BL from hell 3) How much power do you want to drive each cabinet with? From what you have said about distortion from driving cabinets with lots of power you probably just need to be using more cabinets. The caveat that bill applies quite rightly to the fact that his horns use smaller lower powered drivers is not to drive them with more than 500W regardless of the power handling. If thats not loud enough use more cabinets. That way you can still use a high compression ratio, have low distortion and also low power compression. I agree that driving cabs with no more than about 500W is really beneficial as the additional output ends up in the upper bass as distortion not in the lower bass where you really want it as was proved by the SPL response charts by the 2007 Bass shootout at Tulsa Stu |
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All you need to know is:
Sensitivity + Power Handling - Power Compression = Max Output My acts: www.myspace.com/thebowiexperience www.myspace.com/scheisseelektronisches |
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roborg
Registered User Joined: 05 July 2004 Location: United Kingdom Status: Offline Points: 1026 |
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hehe bf kinda likes to annoy people
he's right about the cones usually not being up to the job. However a big driver requires a shorter path for the same low roll off as a smaller driver. Also a big driver in a suitable horn suffers alot less second order distortion than a small one. So as long as the cone is stiff enough to resist flexing too much & the motor is strong, a big driver has advantages.
The best bit of a big driver based horn is opening the box of a new 18 or larger speaker & seeing the monster... My preferrence is now for smaller drivers, like the ciare 12.00sw, but then i pay for that with higher distortion when driven hard (not such a bad thing imho)
cheers,
Rob Edited by roborg - 15 January 2008 at 5:37pm |
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What I cannot create, I do not understand
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opus jody
Young Croc Joined: 06 June 2006 Location: United Kingdom Status: Offline Points: 1246 |
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i thought the subject was 24's . Norty 'll smack your botty!
worth checking the beyma 21" out too, for horns. it does need treating though, to stiffen the paper, particularly on the 1st rib out from the centre. Edited by opus jody - 12 April 2007 at 4:44am |
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Improvised Hardware Music http://vimeo.com/user9389813/videos
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CHAMPION
Old Croc Joined: 30 September 2004 Location: United Kingdom Status: Offline Points: 3667 |
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While were on the subject...someone come up with plans for the PD 2150's 21" Drivers !
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Sticks n Stones
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Disco Stu
Old Croc Joined: 03 March 2005 Location: United Kingdom Status: Offline Points: 2487 |
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Bad idea which is quite perfectly explained here.
http://billfitzmaurice.com/phpBB2/viewtopic.php?t=1130 Stu eAddOnload(bmi_load,"bmi_orig_img");//--> |
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All you need to know is:
Sensitivity + Power Handling - Power Compression = Max Output My acts: www.myspace.com/thebowiexperience www.myspace.com/scheisseelektronisches |
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rich, ind.st
Young Croc Joined: 14 January 2005 Location: United Kingdom Status: Offline Points: 1096 |
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build some imperials :) --- www.decware.com |
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music is god
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intrancer
Registered User Joined: 26 October 2005 Location: Russian Federation Status: Offline Points: 25 |
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LF H1024
Low frequency system - front loaded horn design – passive |
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Ray666
Registered User Joined: 12 July 2005 Location: Estonia Status: Offline Points: 81 |
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:) ouhhhh jeaaaahhhhh :D i love big speakers - i think about that basement thing you mentioned about Pat - i have full basement under my house about 100 m2:D:D:D so i am realy considering of making a "sound room" down there :D oh it will be funnnnnnn ... imagine the horns made out of concrete :D and the mid tops to - i think im going to build this room a very long time - its going to happen in the future - i`m sure of it:D
Peace!!! Raimo;) Edited by Ray666 - 11 April 2007 at 2:49pm |
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Jay Lawless
Old Croc Joined: 22 August 2005 Location: United States Status: Offline Points: 1702 |
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it's possible, but no point to it. if you went that route i hope it's a perma install and not something you will be move 3 times a week...
take the PD2450... huge and is in the TSW 124 i do believe that Mykey posted. i would still go for 4x 18's vs 2x 24's though...
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Previously known as NeverWinter
Background: Automotive, Live and Home Custom Design. mid/high level based design and feild experience. Bass specialist |
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