12" scoop build for hifi
Printed From: Speakerplans.com
Category: General
Forum Name: Show Off Your Sound System
Forum Description: Show of your gear. Post pictures of your Sound System here...
URL: https://forum.speakerplans.com/forum_posts.asp?TID=82949
Printed Date: 27 March 2026 at 4:06am
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Topic: 12" scoop build for hifi
Posted By: pre67
Subject: 12" scoop build for hifi
Date Posted: 23 October 2013 at 10:49pm
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hello i started a thread asking for plans with no a massive about of feed but from what i have seen on the net small scoops are quit often used in hifi's so i found a plan for a 12"scoop and went for it not a clue if its going to sound any good but just building it for fun really so hear we go :) This is the thread i stated off asking for plans http://forum.speakerplans.com/ported-mid-horn_topic82893.html hears the spec so fair i managed to get 2 really nice sounding 12" drivers that will be powerd of a 2x30watt valve amp celestion full range twin cone loudspeakers model ps 12 tc 1798 15ohms 20watts http://s153.photobucket.com/user/pre67loz/media/null_zpsc51f71ba.jpg.html" rel="nofollow">  http://s153.photobucket.com/user/pre67loz/media/null_zpscea19b9c.jpg.html" rel="nofollow">  the plan use shoure what its call the if any one could fill us in on that http://s153.photobucket.com/user/pre67loz/media/12scoopox2.jpg.html" rel="nofollow">  the angels where missing so had to draw it to scale to find them out http://s153.photobucket.com/user/pre67loz/media/null_zps3a6f3813.jpg.html" rel="nofollow">  and this is where i have got to so fair :D my 1st scoop's http://s153.photobucket.com/user/pre67loz/media/null_zpsb4d06e60.jpg.html" rel="nofollow">  http://s153.photobucket.com/user/pre67loz/media/null_zpsebe7d83e.jpg.html" rel="nofollow">  all i need now is 2 nice horns or bullets but i need them to be really efficient low wattage high ohm's tho same as the 12" drivers. I havent got a lot of power to play with |
Replies:
Posted By: pre67
Date Posted: 23 October 2013 at 10:53pm
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one last photo of where i am up to i am awaiting on boroing a saw to do the angels but should hopefully be testing them by the weekend fingers crossed http://s153.photobucket.com/user/pre67loz/media/null_zpscca34d46.jpg.html" rel="nofollow">  |
Posted By: T-Bone
Date Posted: 24 October 2013 at 2:12am
Pre67 I have my fingers crossed because I want to build 12' Eminence Scoops for low mid to mid range (90-990 Hz) if possible loaded with a pro 12" driver. Please let us know the results, thanks! ------------- BASS, how low can you go! |
Posted By: pre67
Date Posted: 24 October 2013 at 7:12pm
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Will do t bone what driver is it you where thinking of useing I think I might build a 3rd for a sub but haven't got a driver So could and Consider anything |
Posted By: Lad
Date Posted: 24 October 2013 at 8:35pm
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T-Bone, go for it! I've got 12" scoop fitted with RCF L12P520, on top goes RCF N300 driver, sounds sweet and the 12" goes down to 65 Hz nicely. Originally built for home hi-fi, I got it from the builder and use it for live gigs. ------------- with regards, Ladislav |
Posted By: odc04r
Date Posted: 24 October 2013 at 10:38pm
| Fair play for having a crack. You can't go too wrong really! It will make some noise regardless. |
Posted By: b grade
Date Posted: 24 October 2013 at 11:06pm
My toy sized 10 inch scoops do not sound right over 300 at all. They were roughly based on the eminence as well, and they are fun for midbass but kinda lousy for mid. Around 320 there is an annoying honk that jumps right of the page in freq response. I cut them off at 200 or lower with 12db/oct and then squash above 300 with a parametric eq shelf. Not saying it can't be done, just that I have not done it. For midrange, I don't see a scoop being the right pick. |
T-Bone wrote:Posted By: T-Bone
Date Posted: 25 October 2013 at 1:04am
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I am planning on using a new Faital Pro 12FH530 it's got weather protected cone and demodulating ring, low Le, low Qts, Bl 19, and cone is medium weight for horn loading OR I can use the industry standard JBL 2206? Any thoughts I also get great pricing on Faital Pro, it's good to know people from the industry. ------------- BASS, how low can you go! |
Posted By: T-Bone
Date Posted: 25 October 2013 at 1:07am
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Pre67 you can try a 12" tapped horn from DIY audio or Marc's site he's got a nice 12" tapped horn. Can go nice to 120 Hz. ------------- BASS, how low can you go! |
Posted By: odc04r
Date Posted: 25 October 2013 at 9:56am
That Faital driver looks like a driver that would be quite at home in a mid or midbass horn but then Fs says that if you design a scoop well I expect you would get a decent response down to 60Hz ish. Would be worth chucking the parameters into a simulator and seeing what happens. |
Posted By: T-Bone
Date Posted: 25 October 2013 at 4:30pm
Unfortunately I do not know or have access to a simulation program if someone in the forum can try please let us know. Thanks! ------------- BASS, how low can you go! |
Posted By: odc04r
Date Posted: 25 October 2013 at 8:48pm
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Akabak is free for personal use, horn response is free too. Loads of tutorials round the web! Draw a plan and have a go. |
Posted By: pre67
Date Posted: 25 October 2013 at 10:30pm
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Cool have u got a plan for the tapped horn ? Might make one for the sub box maybe or just another scoop Had a bit of a shit day to day I thought I would fill the empty space with expanding foam.... So u can probably guess where this is going lol so have to re do the scoops :/ tomorrow. But on a up side I woodcut up and started geting the internal parts glued and screw got all the angle spot on so happy with that |
Posted By: b grade
Date Posted: 25 October 2013 at 10:43pm
| Sorry to hear that. Expanding foam does work, but I find it best to fill a little at a time and make sure that it has somewhere to go when it runs out of room. I do it usually with one side panel off, but I have never done the curve piece of the scoop. I just did it as a straight angled panel. |
Posted By: pre67
Date Posted: 25 October 2013 at 10:55pm
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Yer bit of a f**ker but not to bad to sort out I drilled holes but it filled them and set and just dident have any where Ells to go other then push the face out :-( but should get it sorted tomorrow bit of a set back but never mind Trying to upload pics but dosent seem to be working but ones the do al get them up nothing special just a pic of a smashed up box with a mess of expanding foam and a pic of a start on the angled internal bits |
Posted By: pre67
Date Posted: 25 October 2013 at 10:57pm
| Hiting up a bottle of sailor Jerry's and continue the fun of re doing what iv have already tomorrow :-) |
Posted By: pre67
Date Posted: 25 October 2013 at 11:05pm
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One question where and how much sound deadening fibber stuff sould I put in the boxs No experience with scoops |
Posted By: pre67
Date Posted: 25 October 2013 at 11:45pm
 
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Posted By: mini-mad
Date Posted: 25 October 2013 at 11:48pm
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why destroy the scoop?... did i miss something? ------------- If it sounds like a gorilla is trying to escape, turn it down. |
Posted By: pre67
Date Posted: 25 October 2013 at 11:54pm
| Expanding foam need I say more lol |
Posted By: odc04r
Date Posted: 26 October 2013 at 9:48am
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Haha messy, I'd always fill with one side off but I guess that isn't very helpful advice right now. Don't stress if the foam goes everywhere, just wait for it to dry. When wet it is horrible stuff, when dry it can be shaped, cut and sanded. you could even fill the surface of it with filler and then sand down for a smooth profile using just the foam! Not tried that myself though. |
Posted By: T-Bone
Date Posted: 26 October 2013 at 2:30pm
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Pre67 this is the article on 12" TH http://www.diyaudio.com/forums/subwoofers/232219-325-lab-12-based-pa-tapped-horn-35hz-extension.html" rel="nofollow - http://www.diyaudio.com/forums/subwoofers/232219-325-lab-12-based-pa-tapped-horn-35hz-extension.html http://hornplans.free.fr/mth30.html" rel="nofollow - http://hornplans.free.fr/mth30.html Nice and compact! ------------- BASS, how low can you go! |
Posted By: studio45
Date Posted: 26 October 2013 at 2:54pm
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Do you have a 25mm flat wood boring bit? Very handy for busting large holes into things, mounting Speakons etc. and just the job for creating holes for injection of expanding foam, that are big enough to let it come back out if it wants to.
I would have removed the bulging panel with a jigsaw me, but I suppose your method was better for stress relief  ------------- Studio45 - Repairs & Building Commotion Soundsystem -Mobile PA |
Posted By: pre67
Date Posted: 27 October 2013 at 11:33pm
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Bit if a up date finished the boxs a tested them over the moon with them they sound excellence But u guys where right they don't go p |
Posted By: pre67
Date Posted: 27 October 2013 at 11:41pm
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Bit of an update finished the boxes :-D and tested them they sound excellent over the moon with them but they don't play very low but iv got a little active sub to fill that in Can anyone recommend me a program to see where the speakers cut off to help Decide crossovers to get for the high horns when I get them sorted going to get a DBX mic to use |
Posted By: pre67
Date Posted: 27 October 2013 at 11:44pm
I will post some better photos of them soon all iv got ATM    |
Posted By: odc04r
Date Posted: 28 October 2013 at 10:01am
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Looking good, certainly a living room fixture. Try REW for measurements as a starter perhaps, it is free. But if you have a decent mic then any software that calculates an accurate enough FFT based on the input (play pink or white noise for all frequencies) will show you what is coming out of them. |
Posted By: pre67
Date Posted: 07 January 2014 at 5:49am
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Finally got on with these and finished them so happy with them they look amazing as well Just got to make the brackets to hold the wooden horn Flares and new a new diaphragm for the jbl 2426j comps iv got also if any ones got a 1" to 2" adaptor kicking about iv got one fibre glass one or a matching pair I will have your arm off for them :-) Hear they are :-) scoop porn http://s153.photobucket.com/user/pre67loz/media/96867F53-9068-4ABF-AF3B-401FF8E51D1A.jpg.html" rel="nofollow">  http://s153.photobucket.com/user/pre67loz/media/749E74A6-CDDC-4F43-8428-E6E727061CC5.jpg.html" rel="nofollow">  http://s153.photobucket.com/user/pre67loz/media/D7A2E1E0-F365-4E29-B8DD-7589982F81CF.jpg.html" rel="nofollow">  http://s153.photobucket.com/user/pre67loz/media/31F2F1ED-147B-43DB-A680-F7073AB5CA7A.jpg.html" rel="nofollow">  http://s153.photobucket.com/user/pre67loz/media/C03CD731-D6B2-4495-869A-A5573F1D3B53.jpg.html" rel="nofollow">  |
Posted By: KidCreole
Date Posted: 07 January 2014 at 8:22am
Then fill the rear chamber loosely with Dacron  |
Posted By: guitarplayerjoe
Date Posted: 07 January 2014 at 10:09am
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That's pretty cool, nice work man! :) |
Posted By: dj jammin
Date Posted: 07 January 2014 at 10:11am
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Great work, really like the white finish, makes a change from black! ------------- Reverence Sound system |
Posted By: JR.junior
Date Posted: 07 January 2014 at 11:56am
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Nice scoop work! ------------- Support the scoop technology, larger mouth plays louder! |
Posted By: Dub Specialist Sound
Date Posted: 07 January 2014 at 12:23pm
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Haha cool Scoops man, nice little texured finish too, top job! ------------- 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... |
Posted By: jbl_man
Date Posted: 07 January 2014 at 12:52pm
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Lovely job,nice crisp finish too,very smart. Cant help but wonder what they would sound like with a more up-market vintage driver,as opposed to your vintage Celestion twin-cone,im betting the ATC PA75 long-coil 12" would be a great one. ------------- Be seeing you. |
Posted By: JR.junior
Date Posted: 07 January 2014 at 1:13pm
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I bet, with some live jazz CD, this scoops will present huge sound stage. Dynamics guaranteed! ------------- Support the scoop technology, larger mouth plays louder! |
Posted By: pre67
Date Posted: 08 January 2014 at 1:10am
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Cheers guys I'm so happy with them Pretty much not turn them off two days :D Just waiting on a new diaphragm for the compressoin drivers and then Gota make A bracket to hold the horns at the right angle And yer would be nice to try some more powerful drivers ! But only built them for me room and there more the powerful incredibly sensitive and efficient |