completed doom horns
Printed From: Speakerplans.com
Category: Plans
Forum Name: New Projects Forum
Forum Description: Forum for new speakerplans projects, in memory of Tony Wilkes, 1953 - 2014
URL: https://forum.speakerplans.com/forum_posts.asp?TID=81336
Printed Date: 27 March 2026 at 7:37am
Software Version: Web Wiz Forums 12.08 - https://www.webwizforums.com
Topic: completed doom horns
Posted By: rich, ind.st
Subject: completed doom horns
Date Posted: 18 August 2013 at 9:01pm
|
Decided to start a new thread as its been a year since the last one and i cringe when i see the original hardboard prototype pictures. Having found a new workshop a few months back the doom horns have finally been finished, built from 13mm ply for the horns and 18mm for the rest. The ply for the horn segments was laminated in a vacuum bag, much fun creating a former that withstands the pressure which iirc works out at about 1200lb/sq inch. http://s300.photobucket.com/user/danger_noise/media/doom%20horn%20build/06072013685_zpsa87ba63d.jpg.html" rel="nofollow">  really pleased with how the pieces came out, very negligible springback and an almost invisible glueline. http://s300.photobucket.com/user/danger_noise/media/doom%20horn%20build/09072013689_zps1e06a685.jpg.html" rel="nofollow">  Once the stock was laminated to the curve it was time for the joy of working out the curved compound mitre angle, and then how to go about cutting said mitre. For this pair I ended up using a router jig, bevel bit and then spokeshave to get the angle/s correct, there are more ideal ways of doing it but for the first build this way seemed easiest. http://s300.photobucket.com/user/danger_noise/media/doom%20horn%20build/17072013721_zpsde94a04b.jpg.html" rel="nofollow">  Getting the bits into the clamping jig/doing the glue up was a fair amount of hassle, the mid horn is modular for transport so is constructed in two halves. http://s300.photobucket.com/user/danger_noise/media/doom%20horn%20build/13072013704_zpscac670f0.jpg.html" rel="nofollow">  http://s300.photobucket.com/user/danger_noise/media/26072013747_zps0b91a018.jpg.html" rel="nofollow">  The halves came out pretty well, not entirely perfect but with a little refinement of the method and a composite lamination utilizing some nicer material on the faces leaving them with a wood finish would be possible. http://s300.photobucket.com/user/danger_noise/media/26072013750_zps42f237bb.jpg.html" rel="nofollow">  With the horns being modular the driver for the mid is housed in a seperate module that clamps onto the assembled horn http://s300.photobucket.com/user/danger_noise/media/25072013736_zpsc57ff73a.jpg.html" rel="nofollow">  http://s300.photobucket.com/user/danger_noise/media/doom%20horn%20build/25072013746_zps6cc83be2.jpg.html" rel="nofollow">  http://s300.photobucket.com/user/danger_noise/media/doom%20horn%20build/01082013764_zps59a36b8a.jpg.html" rel="nofollow">  transitiony bit and a lick of paint on the horn segments http://s300.photobucket.com/user/danger_noise/media/01082013771_zps4a1e4773.jpg.html" rel="nofollow">  Whilst it would have been nice to leave the horns unpainted, there is much to be said for them being so black that no light can escape from them. http://s300.photobucket.com/user/danger_noise/media/02082013777_zps9a35fea0.jpg.html" rel="nofollow">  http://s300.photobucket.com/user/danger_noise/media/02082013775_zpsd68c6994.jpg.html" rel="nofollow">  Still need to make the phase plugs but other than that they're up and running, have moved back to a 1" on the top end as the 4590's were slightly overkill and too big of an object to have mounted co-axially. James made up some metal tilt frames which have worked out pretty well, not too heavy and fold flat for transport. As with the method of joining the components together, there is still some room for refinement, but i think the best way to decide on the way forwards with that is to use them for a while and then see which parts of the process cause issues. Even in their current slightly clunky state they only take about 10 minutes each to construct. Had the system out in the gramophone disco tent at boomtown, sounded well with their pre 60's music policy, didnt get any photos due to the dingyness of the tent and phone playing up which is fairly annoying... took a few a couple of days before setting off, but they were also taken in a dingy location, still gives a vague idea... http://s300.photobucket.com/user/danger_noise/media/04082013795_zps780effdb.jpg.html" rel="nofollow">  http://s300.photobucket.com/user/danger_noise/media/04082013791_zpsc2113960.jpg.html" rel="nofollow">  the sheffield drum record through these is pretty amazing/borderline acoustic warfare. ------------- music is god |
Replies:
Posted By: immortal
Date Posted: 18 August 2013 at 10:01pm
| these do look amazing. can't wait to hear them |
Posted By: all bass
Date Posted: 18 August 2013 at 10:12pm
awesome 
|
Posted By: bee
Date Posted: 18 August 2013 at 10:21pm
very very nice job...  I love seeing this kind of wood work....------------- https://www.elements-audio.com |
Posted By: tomr_29
Date Posted: 18 August 2013 at 11:00pm
|
Stunning work! ------------- Proper capitalisation is the difference between helping your Uncle Jack off a horse and helping your uncle jack off a horse. www.facebook.com/tremoracoustics |
Posted By: bee
Date Posted: 18 August 2013 at 11:05pm
|
the quick release clamps you use are very nice, I got a few of them myself, great for holding down bits of wood etc... ------------- https://www.elements-audio.com |
Posted By: TONY.A.S.S.
Date Posted: 18 August 2013 at 11:06pm
|
Excellent work, we need more of this. ------------- http://www.facebook.com/tony.rossell.3" rel="nofollow - http://www.facebook.com/tony.rossell.3 |
Posted By: CETUS A
Date Posted: 18 August 2013 at 11:31pm
|
Quality work
|
Posted By: nomad
Date Posted: 19 August 2013 at 12:04am
i'm impressed !  ------------- In Bass We Trust!! IBWT!! |
Posted By: Timebomb
Date Posted: 19 August 2013 at 12:05am
|
Wicked Job ------------- James Secker facebook.com/soundgearuk James@soundgear.co.uk www.soundgear.co.uk |
Posted By: Battered
Date Posted: 19 August 2013 at 8:22am
Top work, mate. They look fantastic 
|
Posted By: cravings
Date Posted: 19 August 2013 at 8:25am
|
brilliant stuff rich. they look great. what bins are you using these days? |
Posted By: colint
Date Posted: 19 August 2013 at 8:54am
|
Lovely work, There's something very satisfying about bending ply. as Tony says we need more like this, get's a bit boring seeing the same designs all the time so something like this is very refreshing ------------- Never criticise another man until you've walked a mile in his shoes. Once you have, call him what you like, you're a mile away and you've got his shoes! |
Posted By: rich, ind.st
Date Posted: 19 August 2013 at 12:27pm
|
thanks :) it's a bit of a random project that sits somewhere between being an overgrown hifi and an awkward PA. There probably arn't many out there that would consider using something that took them 20min to construct at the venue, but those that would would enjoy every minute of it. At least they arn't too heavy, when separate the halves are a one hand lift and when together with the drivers still a relatively balanced oneman liftable/moveable object. in light of this i'd probably make the next ones with another layer or two of ply in the laminations... Dispersion seems to be around 60 deg and fairly uniform from wandering around infront of them, need to get the measurement setup running and really see whats what. the bins underneath are single 15" FLH's i knocked up a while back, should probably do another thread on them at some point, nothing that special/interesting though. just seen someone took a video of the tent at boomtown, gives a vague idea of how it sounded... https://www.facebook.com/photo.php?v=590399677649704" rel="nofollow - https://www.facebook.com/photo.php?v=590399677649704 ------------- music is god |
Posted By: dylan-penguinmedia
Date Posted: 19 August 2013 at 12:34pm
|
Nice work - they look great! |
Posted By: colinmono
Date Posted: 19 August 2013 at 1:06pm
|
Inspirational stuff! Thanks for posting, love seeing unique projects like this. |
Posted By: Teunos
Date Posted: 19 August 2013 at 1:12pm
|
Pretty needlees to say, but i'm loving this :D How low and high do the horns go? Btw is that you as the dj? pretty stylish outfits round there, guys with dreads, skirts and short tops
 ------------- Best regards, Teun. |
Posted By: Turo
Date Posted: 19 August 2013 at 1:25pm
|
Hello, really nice work. I really enjoy this! What driver you are using, if i may ask? This is the kind of project i would be really interested to do myself also. Thanks -Turo ------------- swaeg.net |
Posted By: Heathrow_B_line
Date Posted: 19 August 2013 at 3:15pm
|
good work you realise that now both you and james have become professional benders? ------------- Produce a killer sound. Take no prisoners. |
Posted By: Autograff
Date Posted: 19 August 2013 at 3:25pm
|
Good stuff Rich, any chance I could pop down for a listen sometime? Didn't know you were doing Boomtown, the Gramaphone disco was one of my usual spots in past years. Missed it this year unfortunately. ------------- Liquid_Steel_Sessions R8 Records |
Posted By: norty303
Date Posted: 19 August 2013 at 5:07pm
|
Bloody fantastic stuff Rich! ------------- My laser stuff: http://www.facebook.com/SubsonicSystems" rel="nofollow - Frikkin Lasers |
Posted By: imageoven
Date Posted: 19 August 2013 at 5:13pm
|
Proper Bo! ------------- Keep pushing on, things are gonna get better. |
Posted By: space-face
Date Posted: 19 August 2013 at 5:42pm
| Could you build a comp into the phase plug? |
Posted By: Tony Wilkes
Date Posted: 20 August 2013 at 1:21pm
|
I am always in awe of Pepe's who have the patience to complete projects like this, well done matey ------------- www.forteaudio.eu - BMS - db-Mark Processors - Lexon (SAE) |
Posted By: Phil B
Date Posted: 20 August 2013 at 2:08pm
|
Yep...those are horns .... .p. ------------- Mostly harmless.... except if catering is shut. Solar Sound System Shennanigans.. http://diyhifi.biz/" rel="nofollow - http://diyhifi.biz/ |