Scoop Issue (Plays deep but doesn't hit hard) |
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MINTEVENTRESOURCES
Registered User Joined: 12 April 2017 Location: USA Status: Offline Points: 59 |
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Posted: 15 May 2017 at 4:52pm |
Hello All,
I was able to add 1 inch thickness to the second baffle and close the throat to about 4.5inches or 114.3mm. Making the depth behind the speaker smaller. This increased the SPL. I will add a few braces in the chamber to secure all added pieces of wood. Lastly, I will continue to give other speakers a shot until I find even better performance. As always I will keep everyone updated and send pictures once I have completed everything.
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Mint Event Resources
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MINTEVENTRESOURCES
Registered User Joined: 12 April 2017 Location: USA Status: Offline Points: 59 |
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Thanks,
I have panels to insert on the rear baffle which will close the chamber and I will adjust and close the throat to the desired opening somewhere around 4.9 inches. I also have the EV 180 in our warehouse so I will be giving it a shot. I will update everyone! |
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Mint Event Resources
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flinnt45
Registered User Joined: 30 April 2013 Location: london Status: Offline Points: 111 |
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Yes Driver confirmed, the baffle in question is the one BEHIND the driver BEHIND the magnet it has the slot at the bottom, which forms the throat, another driver to consider and easily obtainable for you is EVX180B large vas, low qts, reasonable low frequency response, but you will electronically restrict its response to around 35hz so should be ok
Best.....Ian |
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JAH Kreator Hi Fi
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MINTEVENTRESOURCES
Registered User Joined: 12 April 2017 Location: USA Status: Offline Points: 59 |
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Hello Flinnt45, Thanks! To confirm the driver you are referring to is the RCF LF18X400? Next adding the baffle behind the first baffle is understood. At the point of moving the baffle down a degree is where you lost me. Are we still discussing the first baffle or now speaking about the second baffle? Please advise, thanks. |
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Mint Event Resources
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flinnt45
Registered User Joined: 30 April 2013 Location: london Status: Offline Points: 111 |
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Hi Mint
Driver with a big vas is required, good low resonance , reasonable qts RCF l8x400 might suit, you could experiment with the baffle behind the driver, superimpose another on to it, slightly loose around its perimeter so that you can move it, couple of mm should do and move it down by degree,s to reduce the throat size, reduce to 150mm then 125 mm etc this should affect the spl in the desired manner |
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JAH Kreator Hi Fi
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JR.junior
Old Croc Joined: 14 December 2009 Location: Slovenija Status: Offline Points: 1789 |
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scoops with a such big compression chamber have bad coupling to the air into the horn...need plenty of cone movement to get any spl.. starts pumping air efficient at relative higher frequencies, one noted scoop.
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Support the scoop technology, larger mouth plays louder!
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toastyghost
The 10,000 Points Club Joined: 09 January 2007 Location: Manchester Status: Offline Points: 10920 |
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If the pressure is 'stuck in the box' then you're likely losing loads of energy into the poorly braced cabinet.
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turbo7
Registered User Joined: 15 March 2009 Status: Offline Points: 233 |
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its only 57 cm internal, too. A typical problem is: where does the horn start ? It probably is just more added volume to your rear chamber than you think... a bad rear chamber / throat match can result in up to about 20cm less hornlenght. if say, 200cm horn lenght, and 57cm wide, it is more of a small scoop with large throat and large rear chamber volume, and will loose very easy against f.ex. super scoop+v18
Edited by turbo7 - 19 April 2017 at 12:19am |
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MINTEVENTRESOURCES
Registered User Joined: 12 April 2017 Location: USA Status: Offline Points: 59 |
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The box is most happy around 50s to 60s but plays full spectrum of 25 to 95 or so with no problems. No bottoming out. No farting. The box also doesn't sound slow like a lot of the scoops I have heard. It lacks one issue high pressure. I used 3 boxes and filled a 15,000 sq ft venue with bass without using my main tops with are JBL PD 6322. It's almost like the pressure is stuck in the box. With that said I will take a look at the throats and if all else fails use them as is. I will also try my Crown Itech HD amps on the box and see if there is a difference. |
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turbo7
Registered User Joined: 15 March 2009 Status: Offline Points: 233 |
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ok i have just spotted the pics. The design does not really excel compared to contenders, i also see not really much hornlenght which is strange because it should equalize the bass frequencies more instead of the sub, means the opposite what you are telling us.
The 9601, if it fits and if you have the right amount of preferably class H/G or "best impedance" class D power will work in nearly every scoop, but i would also say rebuild to your drivers needs, or take the advice given and leave driver + design behind you. Edited by turbo7 - 19 April 2017 at 12:07am |
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Dub Specialist Sound
Old Croc Joined: 15 November 2013 Location: Smethwick Status: Offline Points: 4873 |
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Also ppls havent mentioned
we dont know all internals build iether, with delflector/s or none , how high/size that up angle panel goes, there just more to it than just throat and rear baffle size, litres , neg/or uniformed horn path ect i was gona say try and give it a go on that throat, but tbh, it looks very close to the front baffle, so yu probley struggle to get one in, with hindering to get yu driver in imho new build.... |
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Musical Roots Reggae Vibration is Life! for music is sound...sound is vibration...vibration is energy... and energy begets life. Therein lies my passion!...MUSIC IS LIFE...
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MINTEVENTRESOURCES
Registered User Joined: 12 April 2017 Location: USA Status: Offline Points: 59 |
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What do you mean by strange chamber baffle? Did you view all of the pictures as I am sure its the viewing angle which is throwing you off. As explained earlier one of the issues is the length of the baffle. Is that what you are discussing? Furthermore, please keep in mind that I have listened to and played on a to of scoops. This box doesn't sound bad at all. I am merely looking for more output and pressure. I have heard many of the scoops that are discussed in this forum and they sound and look horrible.
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