Trapiziod XTro
Printed From: Speakerplans.com
Category: Plans
Forum Name: Punisher and X-tro
Forum Description: Discussion / Questions about the Punisher and X-tro
URL: https://forum.speakerplans.com/forum_posts.asp?TID=6585
Printed Date: 27 March 2026 at 7:51am
Software Version: Web Wiz Forums 12.08 - https://www.webwizforums.com
Topic: Trapiziod XTro
Posted By: Nigey-C
Subject: Trapiziod XTro
Date Posted: 23 September 2006 at 9:42am
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Has anyone built or Designed a Trapiziodal shaped X-Tro?? As i would like to build 4. They need to be trapiziodal!!! So i can array them on top of 8punishers. All help muchly appreciated! |
Replies:
Posted By: ceharden
Date Posted: 23 September 2006 at 10:24am
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Very tricky to do. If you taper towards the back, will there still be enough width for the 15" driver at the back? Would almost be quicker to start from scratch with a cab design. |
Posted By: mykey
Date Posted: 25 September 2006 at 12:08am
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you would have to make the cab wider to start with
if you started with the original size i dont think you would get the 15 loaded in the back its tight already ------------- ......just all them hanging there like giant bananas. |
Posted By: Nigey-C
Date Posted: 25 September 2006 at 9:14am
| Oh well.... Was just gunna try and avoid having a big ugly gap between the front of the cabs... what about using 12s in an X-Tro instead of 15s??? Would they work? |
Posted By: MarjanM
Date Posted: 25 September 2006 at 9:28am
| I was also thinkig of the possibility to use 12s in the xtro. |
Posted By: ceharden
Date Posted: 25 September 2006 at 9:42am
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You could with some tweaking of the horn, but you'd certainly raise the
lower cut-off due to a smaller driver in the same length of horn.
End result would be a massive box that might still only play down to
120Hz. Edit: Hornresp says about 120Hz if you're lucky. Unless you can think of a nice smooth folding to gain another 20cm or so but then the mouth is a bit small..... It's a PITA finding a low-mid section that not only works but fits in a nice shaped box.  |
Posted By: Nigey-C
Date Posted: 25 September 2006 at 12:14pm
| May as well go for a couple of HD15s an a Porn Horn on top of a punisher then??? |
Posted By: ceharden
Date Posted: 25 September 2006 at 12:35pm
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Yup, basically what I'm heading towards. Need Porn Horn MkII to be ready! |
Posted By: odc04r
Date Posted: 25 September 2006 at 3:44pm
You make the porns m8, Ill get out my punishers, maybe get a couple more from somewhere and we'll have ourselves a small southampton linkup 
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Posted By: ceharden
Date Posted: 25 September 2006 at 3:59pm
Don't forget the killer kick bin to go inbetween.  Gonna get a prototype of that done before I move onto the mids. If PD ever biuild my drivers! In the absence of a good 12" flare I might be sticking with the 2x12" quasi direct-radiating box.Really look forward to hearing the Punishers tho. Just need somewhere to play with it all. Might end up hiring a venue for a few hours during the day for some playtime. |
Posted By: odc04r
Date Posted: 25 September 2006 at 5:42pm
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Sounds good to me, have to get the kit down here first and into some sort of lock up. Looking for a new place atm so hopefully it will have a decent garage - and one day I will procure a van. I was thinking of some hd15 style cabs that might use the Ciare 12SW, but I havent done anyhting about this yet. Still also havent given the punishers anywhere near the power they would like, but theyve still been impressive. Haven't had the right gigs so far. Sorry for the thread hijack btw. |
Posted By: Mark James
Date Posted: 06 October 2006 at 6:38pm
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southampton link up??? im only down the road.... might be able to throw in some equipement...... ------------- insert silly sentence here |
Posted By: ceharden
Date Posted: 06 October 2006 at 7:13pm
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Shame you haven't got a large pile of those folded 15" bins yet coner,
could have done with them recently. Venue in Bournemouth blew all
of theirs up. When I finally get round to building some stuff we'll definitely have to meet up for a play. Need somewhere to do it tho. Might just have to hire a local venue on a quiet night. |
Posted By: Mark James
Date Posted: 06 October 2006 at 11:19pm
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if you got any drivers to use you can probably borrow the pair we have got.... their starting to get a little wet as we havent found indoor storage yet..... and they are still sat in the garden!!! ------------- insert silly sentence here |
Posted By: phil_illicit
Date Posted: 08 October 2006 at 9:11am
if you wanna add another 8 punishers to your linkup let me know
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Posted By: Nigey-C
Date Posted: 08 October 2006 at 9:11am
| ill have 8 in a week! |
Posted By: Mark James
Date Posted: 08 October 2006 at 6:38pm
either way im up for some link-ups at some point!!! [8 punishers sounds funny added to waht everyone else can put in]
   ------------- insert silly sentence here |
phil_illicit wrote:Posted By: Nigey-C
Date Posted: 08 October 2006 at 6:40pm
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so wats the total then? will it be just a wall of sound?? Also... anybody noticed what the topic title is?? its about the xtro, not a link up for punishers |
Posted By: Mark James
Date Posted: 22 October 2006 at 1:53am
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im toying with the idea of a split x-tro... something like the kick plan walt posted a while ago [like the x-tro but straighter... with the issues raised ironed out] and mounting the 8" section into its own box [mayey like the mt122 type layout..... 2 8" horns with a compression horn and maybey even ullets in between... trapezoidal if neccessary. etc] any one else considering this idea still.................. ------------- insert silly sentence here |
Posted By: doober
Date Posted: 23 October 2006 at 11:00am
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Returning to the original topic there's a trapezoid x-tro(ish) box http://www.forums.licht-geluid.nl/forums/zelfbouw-luidspreker-forum/15740-hobby-project-2x18bas-top.html - here . Can't understand the discussion (slight language problem) but there are some good pics and drawings.
Regarding seperate boxes, I have been thinking a punisher size kick bin containing 2x15" x-tro style or 1x15 bent horn could be very usefull as it will stack well amongst/atop punishers. Above these could be a much smaller and lighter (easier to lift up high) 8"+1" which could be made trapezoid. Maybe something like http://www.users.bigpond.net.au/ggoodacre/centauri/diy/mh28450.html - this? if you want 2x8" ------------- Blahblahblah |
Posted By: jethrocker
Date Posted: 23 October 2006 at 1:14pm
yes Coner...exactly what i'm after, as mentioned before. I have a few ideas but don't have my own computer at the moment, or really enough knowledge to sort it. Definitely interested in any developments. I really want to rearrange things to have horizontal cabs with 15" horn sections side by side..
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Posted By: Mark James
Date Posted: 25 October 2006 at 5:22pm
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ditto on the computer thingy..........
er id not be too bothered about the issue of on top of another or side by side........ [as id be stacking 2 heigh and xyz wide probably...]
quite tempted to just build x-tros minus the mid horns and stack em side by side........ so using only as a rather nice kick bass [with a few spacees for whatever] then make apropriate mid top boxes [may be a rather unscalable system though.... but hey just athought] ------------- insert silly sentence here |
Posted By: jethrocker
Date Posted: 25 October 2006 at 5:30pm
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You mean xtros side by side as in flipped over? Surely if you take off the mid horn section they'll be a slightly funny shape. I've been looking at ways to fit a similar folding into a side by side configuration, but with no 'puter can't really do anything more than speculative sketches, no real dimensions or anything.
I posted here before about flipping the xtro sections 90deg and didn't really get much feedback..not sure how it would work, less dispersion maybe?
We definitely need something suitable that covers that range... Xtros are great but don't suit everyone... Oddly enough they're probably too compact for me, I imagine them looking lost and lonely with just one cab on top of three scoops..
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Posted By: Mark James
Date Posted: 25 October 2006 at 6:19pm
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i meant as in the x-tros built as they would usualy be but with the 8" section drivers less. stacked as theyd be if they were arayable and having the 8" in a trapezoid cab...... ie just a wall of x-tros ------------- insert silly sentence here |
Posted By: jethrocker
Date Posted: 25 October 2006 at 8:56pm
| Yeah..but what happens to the bit where the top driver in the kick section sits behind the 8" section...you just going to box it off and accept the useless space? |
Posted By: jethrocker
Date Posted: 25 October 2006 at 8:58pm
| oh, and also.. Are you still going 5 way? Or is it just subs, xtro kick style/ mids/tops? |
Posted By: Mark James
Date Posted: 15 November 2006 at 6:55am
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sub kick mid comps and bullets.... so yeah 5 way
------------- insert silly sentence here |
Posted By: Mark James
Date Posted: 15 November 2006 at 7:08am
realy like the look of the pics from that first link but i cant even start when it comes to languages...... ------------- insert silly sentence here |
Posted By: jethrocker
Date Posted: 15 November 2006 at 12:25pm
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Coner..still curious, how could you remove the 8" section and make the cab smaller?
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Posted By: irate-drss
Date Posted: 07 December 2006 at 1:12pm
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yeah that mid top on that dutch page is pretty damn sexy! anyone speak dutch or got anymore info on them? ------------- Dayliterobbery Soundsystem |
Posted By: Jeroen
Date Posted: 11 December 2006 at 10:34am
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Hi, I am )jeroen(, the guy from the dutch forum. I am thinking about making a prototype soon. This is the last version of the design:  2x12" 18Sound 12ND930 1x8" B&C 8PE21 1x1"/1.4" The design is made for the 18Sounds as low/mids, most of the other 12" speakers won't fit. ------------- JVsound |
Posted By: Nigey-C
Date Posted: 11 December 2006 at 2:25pm
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very nice design. Do you know what the Reponse will be like from it? Is it designed with being used with a punisher? |
Posted By: Mark James
Date Posted: 11 December 2006 at 3:43pm
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aha i was viewing this on the dutch forum a week or so ago. but i couldnt work out much but i did look at the varius designs..... id lik to see the plans ------------- insert silly sentence here |
Posted By: kevinmcdonough
Date Posted: 11 December 2006 at 8:09pm
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Hey all I babelfish-ed the pages of that forum, and although it only made marganally more sense (lol some of the translation was quite comical  ) I am very interested in this design.Phil Dekked, of your about would you mind speaking to your pals at NCA who import the 18 sound drivers, and see what price they can get the ones for this design for ( 2 x 18 sound 12ND930 instead of the normal punisher 15", plus the normal mid and high sections) and see how it compairs to the fairly steep cost of the normal punisher drivers? And a question for Jeroen if you dont mind answering, what kind of dispersion does the cabinet have, and does it array well along the angles of the trapezoidal sides? kev |
Posted By: Mircea Bartic
Date Posted: 12 December 2006 at 5:20am
it looks like the dispersion will be about the same as for the original X-tro about 60x40 above 2Khz probably unfortunately I don't think this one it will array properly either, but will be a lot better in terms of comb filtering than the xtro the MF will overlap either way you put it = comb filtering is inevitable the HF will have the same problems too, + some more, because it will not be close to another, thus it wil not sum corectly, and there will be no hf gain, just wider dispersion anyway I like the design, I think is the furthest we can go with the curent technology. Please note that the mid section can't be made to work perfect without having a hyperbolic reflector in it , to create a virtual sound source behind the enclosure so the dispersion could be corectrly controlled. I saw this being implemented somewere, but in our case I don't think is feasable. ------------- general manager & head designer at nexus-acoustics research http://www.facebook.com/nexus.acoustics.research" rel="nofollow - http://www.facebook.com/nexus.acoustics.research Ex Nexus_3 |
Posted By: kevinmcdonough
Date Posted: 12 December 2006 at 5:05pm
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yeah, pretty much what i had thought, I was just hoping i may be wrong  Still a very interesting design though, and i thnk the double 12" section may work out a good bit cheeper than the double 15" one on the original. with regards to the parabolic bit you mentioned, i think i have an idea of what you mean but would be interested in some more detailed explination if you don't mind. k |
Posted By: Jeroen
Date Posted: 12 December 2006 at 6:13pm
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It's a longterm diy-project for me, so first i want to build and test/modify some prototypes, maybe after that i can post plans.. But that won't be soon (sorry).
------------- JVsound |
Posted By: Mircea Bartic
Date Posted: 13 December 2006 at 3:31am
page 3 of this data sheet explains a little of the technology behind it http://www.intersonic.se/produkter/nexo/pdf/GEOScreen.pdf - http://www.intersonic.se/produkter/nexo/pdf/GEOScreen.pdf ------------- general manager & head designer at nexus-acoustics research http://www.facebook.com/nexus.acoustics.research" rel="nofollow - http://www.facebook.com/nexus.acoustics.research Ex Nexus_3 |