New sub
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=31018
Printed Date: 26 March 2026 at 10:55pm Software Version: Web Wiz Forums 12.08 - https://www.webwizforums.com
Topic: New sub
Posted By: MusicXtra
Subject: New sub
Date Posted: 25 September 2009 at 4:06pm
For my http://forum.speakerplans.com/line-array-projects_topic27433.html - line-array I was looking for a good sub. I tried punishers but they didn't go low enough. I tried B2's, they go low enough but they didn't sound good enough and they are very big. I tried front-loaded 18" BR, they are to big and not loud enough. Finally I start drawing, calculating, simulating and building a complete new double 18" sub. This sub is loaded with two Beyma 18G550 and tuned on 35 Hz. Today I finished the first prototype in MDF and it sounds very good. The cabinet is 60*70*90 cm and loaded with two 18" Beyma speakers. Next project is building 4 of these cabs in 18mm birch plywood.

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Replies:
Posted By: Mark James
Date Posted: 25 September 2009 at 4:12pm
looks good!
------------- insert silly sentence here
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Posted By: VECTORDJ
Date Posted: 25 September 2009 at 4:16pm
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Hi, Is yhis like the EV T18 or Beyma's new sub plan or something a bit diff????VECTORDJ
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Posted By: MusicXtra
Date Posted: 25 September 2009 at 4:19pm
VECTORDJ wrote:
Hi, Is yhis like the EV T18 or Beyma's new sub plan or something a bit diff????VECTORDJ |
Could be, I didn't look to other plans with developing this sub. So this is 100% my own design.
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Posted By: mrchay
Date Posted: 25 September 2009 at 4:37pm
Its certainly nothing like the EV T18, even just judging from the pics of both cabs.
It looks very much like beyma's new sub cab, but doubled up. so same principle (advanced reflex loading, or tapped-horn-ish, or whatever its fashionable to call this these days).
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Posted By: james folkes
Date Posted: 25 September 2009 at 4:53pm
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cor mister, how's that work then?
have you got a picture with the side off? good size for an f3 of 35Hz with medium/high sensitivity...
james.
------------- mardy hippy.
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Posted By: Drimacoustic
Date Posted: 25 September 2009 at 6:04pm
Design seems to be similar with EAW SB1000 without 4 round ports in corners.
------------- love begins below 40Hz
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Posted By: Jake_Fielder
Date Posted: 25 September 2009 at 6:19pm
is the port coming out between the drivers?
What method did you use to tune this?
cheers
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Posted By: MusicXtra
Date Posted: 25 September 2009 at 6:36pm
Jake_Fielder wrote:
is the port coming out between the drivers?
What method did you use to tune this?
cheers
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The port comes out between the drivers, the tuning was the biggest problem, normal calculation programs didn't work. I did a lot of trial and error with different port length and every time I listend and measured with a sine wave and watch the cones for the X-max.
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Posted By: Jake_Fielder
Date Posted: 25 September 2009 at 6:37pm
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cool, how long is the port? or does it just end at the end of the drivers?
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Posted By: MusicXtra
Date Posted: 25 September 2009 at 6:40pm
Jake_Fielder wrote:
cool, how long is the port? or does it just end at the end of the drivers?
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The port is 23 cm but it is difficult to say where the port starts.
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Posted By: MusicXtra
Date Posted: 25 September 2009 at 6:47pm
Here a picture of a few different subs for comparing and measuring.
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Posted By: Jake_Fielder
Date Posted: 26 September 2009 at 2:40pm
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Cool, how come the wheels arent on the back?
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Posted By: MusicXtra
Date Posted: 26 September 2009 at 3:55pm
Jake_Fielder wrote:
Cool, how come the wheels arent on the back?
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The wheels on the picture are from a dolly, this is only a prototype.
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Posted By: audioalliance
Date Posted: 27 September 2009 at 2:32pm
very nice build.. But what's the weight like though?
------------- http://www.myspace.com/audioalliance
music is our mission
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Posted By: Teunos
Date Posted: 27 September 2009 at 2:56pm
Heey music, do you have any plots for this new cab? Measured response or just the plotted simulation(hornresp, akabak or whatever you used) is both fine.
------------- Best regards, Teun.
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Posted By: MusicXtra
Date Posted: 27 September 2009 at 2:58pm
audioalliance wrote:
very nice build.. But what's the weight like though?
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This prototype is heavyer than a tank but this is made from MDF. The birch plywood version is much lighter but tanks to all the bracing inside it's still around 90kg.
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Posted By: everdark
Date Posted: 27 September 2009 at 8:48pm
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Xtra you doing great things as i've noticed. Try Neo subs for your sub, such as b&c or ciare.
------------- music is the only language I really know
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Posted By: MusicXtra
Date Posted: 28 September 2009 at 8:12pm
everdark wrote:
Xtra you doing great things as i've noticed.Try Neo subs for your sub, such as b&c or ciare. |
Tnx for the tip but I allready have 8 Beyma 18 G550's. The only advantage of Neodynium is the weight of the driver and for subs it is not a very important issue.
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Posted By: everdark
Date Posted: 28 September 2009 at 8:37pm
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ok i understand. btw, how far do your LA play?
------------- music is the only language I really know
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Posted By: MusicXtra
Date Posted: 28 September 2009 at 9:45pm
everdark wrote:
ok i understand.btw, how far do your LA play? |
What do you mean with far, the throw or if it's finished? The throw is about 30/40 meters. I'm waiting for anodising the rigging hardware for the last 6 cabinets. Than I have 12 cabinets complete.
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Posted By: everdark
Date Posted: 28 September 2009 at 10:20pm
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yes i meant throw. The point that keeping me from building tiny array is that they almost useless about midbass frequencies. But i don't wanna build a giant hornloaded ones, so how low do yours play?
------------- music is the only language I really know
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Posted By: wafflesomd
Date Posted: 28 September 2009 at 10:25pm
Posted By: MusicXtra
Date Posted: 28 September 2009 at 10:38pm
everdark wrote:
yes i meant throw.The point that keeping me from building tiny array is that they almost useless about midbass frequencies. But i don't wanna build a giant hornloaded ones, so how low do yours play? |
The line-array is usuable from 100 Hz. But, for the best result, espessialy for dance events the system needs a kick-bin from 80-150 Hz. The range 80-150Hz is a problem for the most small line-array's because the length of the array is to short for this frequentie.
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Posted By: everdark
Date Posted: 29 September 2009 at 8:29am
that's it. I have a ground system that meet my needs perfectly. so if I even wanted to build something, only that works from 60 hz at least in order to have no subs at all in some applications
------------- music is the only language I really know
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Posted By: MusicXtra
Date Posted: 02 October 2009 at 1:57am
everdark wrote:
that's it. I have a ground system that meet my needs perfectly. so if I even wanted to build something, only that works from 60 hz at least in order to have no subs at all in some applications |
If you want to build a line-array than you need up to 10 cabinets per side to let it work under 100 Hz. The length of the array must be as long as half the wavelength of the lowest frequenty, below this frequenty the low drivers wil work as separate drivers without the coupling so the throw will be the same as for front loaded conventionel cabinets for this frequenty's. For the range 60-150Hz some systems use extra sub cabinets in the array, for me this is not an option because of the height of the total array. Next project, after finishing my new subs I want to improve the lower frequenties of my line array, I think that I make a miscalculation with the port tuning.
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Posted By: MusicXtra
Date Posted: 06 October 2009 at 11:06pm
Here's a picture from the first cabinet in birch plywood. The sound is amazing, from below 30 Hz it gives serious pressure. I start to build 4 subs and this is the first so far.

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Posted By: DjMidKnight
Date Posted: 07 October 2009 at 1:09am
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looks nice man, quite compact i dig it.
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Posted By: wafflesomd
Date Posted: 07 October 2009 at 3:29am
Posted By: Teunos
Date Posted: 07 October 2009 at 8:24am
SB1000 has front chamber not even reaching to the middle of the cab. Correct me if i'm wrong but this has a front chamber extending all the way to the back panel.
------------- Best regards, Teun.
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Posted By: MusicXtra
Date Posted: 07 October 2009 at 10:45am
wafflesomd wrote:
Ok now it's an SB1000. |
So in your opinion every trapezium basreflex is an SB850 and every self powered speaker is a Meyer UPA?
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Posted By: wafflesomd
Date Posted: 08 October 2009 at 2:02am
MusicXtra wrote:
wafflesomd wrote:
Ok now it's an SB1000. |
So in your opinion every trapezium basreflex is an SB850 and every self powered speaker is a Meyer UPA?
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Uh, no. Every speaker that is a trapezium bassreflex that is basically a copy of the sb1000 is essentially an sb1000.
It's just a reflex.
Teunos wrote:
SB1000 has front chamber not even reaching to the middle of the cab. Correct me if i'm wrong but this has a front chamber extending all the way to the back panel.
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Ok, they're both still reflexes. Nothing special.
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Posted By: Carl P
Date Posted: 08 October 2009 at 2:43am
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it looks like an air munchin alien robot................COOL
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Posted By: MusicXtra
Date Posted: 08 October 2009 at 2:58pm
wafflesomd wrote:
MusicXtra wrote:
wafflesomd wrote:
Ok now it's an SB1000. |
So in your opinion every trapezium basreflex is an SB850 and every self powered speaker is a Meyer UPA?
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Uh, no. Every speaker that is a trapezium bassreflex that is basically a copy of the sb1000 is essentially an sb1000.
It's just a reflex.
Teunos wrote:
SB1000 has front chamber not even reaching to the middle of the cab. Correct me if i'm wrong but this has a front chamber extending all the way to the back panel.
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Ok, they're both still reflexes. Nothing special.
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The lenght, depth, hight, shape, number of ports, diameter and length of the ports, speaker angle, type of speaker are a few things that are different from the SB1000. So in my opinion it is a total different design.
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Posted By: darkmatter
Date Posted: 08 October 2009 at 3:56pm
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good work, bet it goes low and has decent distortion specs.
waffles - i think musicxtra's probably a bit thrown by your comment cos he's clearly put a lot of work into tuning a design that's not that simple to simulate. if you dismissed every dual reflex design as just being the same as another there would be very few speaker designs about ;)
most designs, whether they're speakers or whatever else, are re-hashes of older designs with tweaks made depending on which factors the designer values most highly. similarly, the SB1000 wasn't the first of it's kind.
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Posted By: Progrezz
Date Posted: 08 October 2009 at 4:33pm
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Why does everyone on this forum look down on bass reflex cabs? As far as sound goes, a BR is still the only way to go. Look at Meyer, L'Acoustics, EAW, ... Every sub in a live situation you'll see is a BR. Horns are only suitable for certain types of dance music and people only use it because of the high sensitivity and throw. But if you look at the Meyer 700-hp for instance, which in waffles oppinion is nothing more than a pain-ass reflex cab and hell it is, but those things sound mighty-fine, have a sensitivity of 110db, go awefully deep and throw pretty damn far. It's just one of the reasons why brands like Meyer and Eaw are still in business.
Btw; the SB1000z and especially the sb1002 is one hell of a subwoofer too. If MusicXtra's design is anything like that, which it looks like it is, it's going to sound even better when using 4 or more subwoofers next to each other and the sensitivity and throw should go up too.
I've used them with the kf730 line array. Put all the subs in front of the stage, all next to each other in the middle. Works pretty well if you have a long room.
Anyway, looks like a nice cab. I'd love to hear it play ;)
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Posted By: wafflesomd
Date Posted: 08 October 2009 at 5:03pm
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I'm not looking down on reflex cabinets...
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Posted By: Jake_Fielder
Date Posted: 08 October 2009 at 5:22pm
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Theres only so many ways to design a cab. i designed my ported horns with out purposely copying other designs, but they look very similar to previous ones and ones people have designed since.
This layout was obviously the best arrangment that musicxtra found whilst designing to get the required output / size of cab.
As deadbeats sig once said, its a speaker with bits of wood around it.
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Posted By: darkmatter
Date Posted: 08 October 2009 at 6:06pm
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i didnt think you were man you dont come across like that, its just the way you put it that could be easily misunderstood
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Posted By: MusicXtra
Date Posted: 08 October 2009 at 6:26pm
I allways start my design with a wishlist, this was the wishlist for this sub: - I want a sub with a usable bandwith from 35-100 Hz. - One sub must have enough power for two of my http://forum.speakerplans.com/line-array-projects_topic27433.html - line-array tops, this means that it must be a very powerfull cabinet. - I don't want to make a hornloaded cabinet because of the size when the frequentie must come below 45 Hz. - I don't want to make a bandpass like the B2 because I don't like the slow sound of it. - The width must be the same as my line-array,(60 cm). - I want to use it with 2 subs per side for my 'standard' PA (two subs and four line-array tops per side) so with two subs the height must be somewhere between 1.2 and 1.6 meter, this means between 0.6 and 0.8 meter for one cabinet and this also means that only the depth was free. - I want to use 18" drivers, they are 470 mm outside so with two drivers per cabinet it is impossible to mount them in a flat front panel.
With this wishes I start thinking about the design and make lots of drawings on every piece of paper on my desk . After a while I start making simulations with different speakers and cabinets and this cabinet gives me the best results. After building the first prototype I discovered that the port was on the wrong place, the first prototype was a real beast for frequenties below 30 Hz but it failed between 65 and 80 Hz. After I changed the ports to the front panels the dip was gone and it was a little less for the frequenties below 30 Hz but this is still a beast. Compared to punishers, B2 and a Mach 182R sub this sub is much better below 40 Hz, has a better definition than the B2 and the Mach but in the range from 50 to 100 Hz the punishers (two cabs) are a little louder. With comparing I connected all subs on a Lab 4000, put them on the right time alignement and processed them as good as possible. I started this process a year ago and now I'm building four cabinets (two to go ). So, saying that I build an SB1000 is a little to simple after all the blood sweat and tears.
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Posted By: Tony Wilkes
Date Posted: 09 October 2009 at 9:33am
Progrezz wrote:
Why does everyone on this forum look down on bass reflex cabs? |
You have obviously not read any of charden or my post's.
Its like the TV programme in the UK "Top Gear" everone likes to hear and talk about the Ferrari this and Lamborghini that and then drive home in their Ford Focus's.
Keep up the good work musicextra but a bit more detail of the cabs would probably be appreciated by some pepes.
Tony
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Posted By: Crashpc
Date Posted: 09 October 2009 at 10:12am
No, that's diferret. Cause wee all can have almost the same speakers available to costruct with them own boxes, as manufacturers do... We have the same ferarri, but we only cannot build and drive them as professionals.
I realized, that the best compromise(for me) between low bas and good sensitivity in acceptable cab is horn-flex construction. This, and similar: http://www.swdradio.com/service/speaker/RCF_Bassbin.jpg But still like bassreflex for its natural and deeper sound and horns for its extra impact kickbass.
------------- Nikon and Canon people should not be married to each other. Why did you let this happen?
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Posted By: MusicXtra
Date Posted: 17 October 2009 at 5:04pm
Lot's of hours of hard working with this as result. Next week the finishing touch, painting and mounting.
 I will replace the wheels of the first sub for new wheels after painting.

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Posted By: Crashpc
Date Posted: 17 October 2009 at 5:18pm
This must have powerful kick maaan!
------------- Nikon and Canon people should not be married to each other. Why did you let this happen?
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Posted By: Ibex
Date Posted: 17 October 2009 at 7:07pm
Guys, this is no EAW SB1000

 ... this is a EAW SB1000!
cheers
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Posted By: MusicXtra
Date Posted: 17 October 2009 at 7:56pm
Ibex wrote:
Guys, this is no EAW SB1000

 ... this is a EAW SB1000!
cheers
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Only a few details are different. 
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Posted By: DjMidKnight
Date Posted: 17 October 2009 at 8:16pm
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Very nice my friend quite a nice looking build. whats the avg construction time on those cabs for you just out of curiosity.
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Posted By: RiddimKid
Date Posted: 17 October 2009 at 8:39pm
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I Like the look of these, Something different you dont see everyday!!
Very Nice
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Posted By: Crashpc
Date Posted: 17 October 2009 at 8:55pm
Ibex: We know. Or I hope other does too... EAW makes some SBXXX four ported box, so similarity can be better, but that is not the issue - SB1000 is huge bassreflex system and this should be more compact and kicky... Maybe good, maybe not, but the sound is specific and great....
------------- Nikon and Canon people should not be married to each other. Why did you let this happen?
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Posted By: wafflesomd
Date Posted: 17 October 2009 at 11:55pm
RiddimKid wrote:
I Like the look of these, Something different you dont see everyday!!
Very Nice |
Unless you're touring with an EAW array 
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Posted By: subbass
Date Posted: 18 October 2009 at 12:31am
wafflesomd wrote:
RiddimKid wrote:
I Like the look of these, Something different you dont see everyday!!
Very Nice |
Unless you're touring with an EAW array  |
probably worth dropping it now mate
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Posted By: djstefanos
Date Posted: 18 October 2009 at 12:53am
gorgeous cabs, well done guy.
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Posted By: Tim Bespoke Audio
Date Posted: 18 October 2009 at 1:38am
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I only wish you lived over here ! i would order from you !!
Top build
------------- Bad bwoy jah Timmy soon to have the biggest SOUND around
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Posted By: Ibex
Date Posted: 18 October 2009 at 10:31am
Did you try to reverse one of the drivers to minimize distortion?
What's the intention of angling the baffles? Did you also try this cab with parallel baffles? I presume that you did not, because your prototype had the port inbetween the driver baffles...
Indeed, posh building! 
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Posted By: Crashpc
Date Posted: 18 October 2009 at 11:01am
Ibex: you only lower one kind of distortion and other kind of distortion will rise for sure. Of course, you will make two diferrent box volumes, so you will miss the "speaker response alignment" etc.
Angling of the baffles is here for SPL increase,better mounting, less reflex affects, and less stress for the drivers and box. I tried SB-18 beymas box, and it is not usable without double walls from good "wood" No chance for DTD to stay alive for 5hours of stress from 1kW BC speaker. It would break in the middle!
------------- Nikon and Canon people should not be married to each other. Why did you let this happen?
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Posted By: MusicXtra
Date Posted: 18 October 2009 at 12:22pm
Tim Bespoke Audio wrote:
I only wish you lived over here ! i would order from you !!
Top build |
It's a small world, if you want I can build a few for you.
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Posted By: MusicXtra
Date Posted: 18 October 2009 at 12:24pm
DjMidKnight wrote:
Very nice my friend quite a nice looking build. whats the avg construction time on those cabs for you just out of curiosity.
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Difficult to say but I think one day per cabinet including painting.
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Posted By: MusicXtra
Date Posted: 18 October 2009 at 10:16pm
Ibex wrote:
Guys, this is no EAW SB1000

 ... this is a EAW SB1000!
cheers
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A strange combination of ports, I see a big port between the speakers, same construction as in my first prototype, and a small port in the front.
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Posted By: csg
Date Posted: 18 October 2009 at 11:03pm
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the front ports look like they are tuned very low, small cross section and long duct - the rear one looks fairly high.
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Posted By: MusicXtra
Date Posted: 19 October 2009 at 9:40am
csg wrote:
the front ports look like they are tuned very low, small cross section and long duct - the rear one looks fairly high.
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Nope, that won't work.... A basreflex is nothing more than a helmholz resonator and that means you can tune it on one frequentie and not on two. So it is impossible that the front port give the cab a low tuning and the port between the speakers give it a high tuning like a bandpass.
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Posted By: bass*en*mass
Date Posted: 19 October 2009 at 9:59am
depends if you see a horn as a port too... that design seems to be a mixture of a double frontloaded mini-horn acting like a big reflex-port that is supported by ports/horn in the rear chamber. its just a question of definition! (so it is possible to tune it on different frequencies - ask rog, stasysX...) cheers
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Posted By: pfly
Date Posted: 19 October 2009 at 10:10am
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bass*en*mass are you relating to Stasys Xs back chamber series tuning?
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Posted By: Ibex
Date Posted: 19 October 2009 at 10:10am
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Is it possible, that the horn-port in the middle basicly tunes the cab on a specific frequency and the ports beside the horn-port can be used to fine tune the reflex adjustment?
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Posted By: Crashpc
Date Posted: 19 October 2009 at 10:17am
There is olny one(divided) bassreflex and "maybe" one horn waveguide. If it is like that, the bassreflex wouldn't be tuned properly when only one big between the speakers present. They needed some diferrent tuning and shape for the horn part, so they did, and they helped themselves by moving part of the reflex on the diferrent place. Simple :-) Who knows what was the meaning.
------------- Nikon and Canon people should not be married to each other. Why did you let this happen?
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Posted By: bass*en*mass
Date Posted: 19 October 2009 at 10:33am
Posted By: Ibex
Date Posted: 19 October 2009 at 10:34am
Crashpc wrote:
There is olny one(divided) bassreflex and "maybe" one horn waveguide. If it is like that, the bassreflex wouldn't be tuned properly when only one big between the speakers present. They needed some diferrent tuning and shape for the horn part, so they did, and they helped themselves by moving part of the reflex on the diferrent place. Simple :-) Who knows what was the meaning.
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...same what I was assuming.
Maybe they changed the drivers and after that the port tuning had to be resetted, but they didn't want to redesign the cab or the horn-port, so they were searching for a quick solution and added tho two ports. The SB1002 maybe is the redesign with the proper horn-port tuning. Who knows...?
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Posted By: Crashpc
Date Posted: 19 October 2009 at 10:42am
I did not understand to your "bassreflex fine tuning" so that was why i made my answer. Now I get it - we are on the same boat....
------------- Nikon and Canon people should not be married to each other. Why did you let this happen?
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Posted By: Ibex
Date Posted: 19 October 2009 at 10:47am
If we are right, then shame on EAW for this less-than-ideal solution!
...I can't believe that they would do something like that!
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Posted By: Crashpc
Date Posted: 19 October 2009 at 10:51am
They must make good solutions for customer, not ideal for themselves. If you ever heart two PD-186 speakers in that box, powered by 2000W each, you'd know it is not overpowerable by any other manufacturer. The sound is like from the Earth core :D
------------- Nikon and Canon people should not be married to each other. Why did you let this happen?
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Posted By: bass*en*mass
Date Posted: 19 October 2009 at 11:02am
2kw on a pd186 speaker what watt should that be, imaginary ones? stop lying to yourself...
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Posted By: Ibex
Date Posted: 19 October 2009 at 11:07am
Shame on the austrian pa rentals that I have never heard an EAW cab!
...the PD is'n the the from EAW used driver, isn't it?
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Posted By: Crashpc
Date Posted: 19 October 2009 at 11:08am
No way maaan! It is high quality 5" voicecoiled speaker. Who says you apply neverending 2000W sinus wave on 40Hz at it?! The middle power will be about 400-500Watts , and 6db for peaks. It is fully usable, If you set your cross/processor recommended properly... People normally use 1200-1600W on 4" VC speakers like BC18TBX100 or RCF LF18X400. You have to know, how to use it. If you play techno full of rectangle signal, okay, you are right. That is too much.
Nope, The PD186 is not stock speaker of EAW SB1000
------------- Nikon and Canon people should not be married to each other. Why did you let this happen?
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Posted By: Progrezz
Date Posted: 19 October 2009 at 3:41pm
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Rather this one: http://www.usspeaker.com/eighteensound-18LW1400-1.htm
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Posted By: Crashpc
Date Posted: 19 October 2009 at 9:54pm
Do you really think, that speaker with 4" Voicecoil "Has more watts" than another with 5" voicecoil? Whatewer can be written on there, it won't be true....
------------- Nikon and Canon people should not be married to each other. Why did you let this happen?
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Posted By: MusicXtra
Date Posted: 19 October 2009 at 10:03pm
Crashpc wrote:
Do you really think, that speaker with 4" Voicecoil "Has more watts" than another with 5" voicecoil? Whatewer can be written on there, it won't be true....
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The diameter of the voice coil doesn't say how much power it can have. Most 18" speakers in this categorie are 700-1500 Watt, the X-max is for most subs a bigger ' problem' than how much electrical power it can have and most of this speakers have an X-max from 8-10mm.
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Posted By: Crashpc
Date Posted: 19 October 2009 at 10:16pm
Sorry - but PD drivers are the most quality you can have in standart sales. It has really beast sizes of everything, not only VC, and people use it as I said with no damage. You are right about cone excursion, but it is handle-able by good processor. Tell me about Xmax? Many manufacturers only say, that Speaker reaching the Xmax produces some percentage of distortion, but nothing about how it will sound, or if the surround or spider will be damaged. Todays speakers can handle up to 30mm peak-peak of excursion, and you will not hear any bad sound from it, even if its Xmax is about 10mm 0-p. The Xlim of these speaker is more than 50mm p-p, and for example B&C Speakers are not gonna crash the backplate even if you push 3000W to it, but waporize the voicecoil.
And diameter of the voicecoil matters :-) No. Yes! No! Stop it! But he started! No matter who started, I finish it! :-)
------------- Nikon and Canon people should not be married to each other. Why did you let this happen?
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Posted By: norty303
Date Posted: 20 October 2009 at 12:36am
Back to the original design (not the EAW one) it looks like a manifold BP6 cab, in fact very similar to the Beyma B25/9 from their old plans on the website. Difficult to model because the front chamber is a whole port all by itself. Certainly very different characteristics to 'just a BR' cab with a bent baffle.
------------- My laser stuff: http://www.facebook.com/SubsonicSystems" rel="nofollow - Frikkin Lasers
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Posted By: mobiele eenheid
Date Posted: 20 October 2009 at 1:50am
And diameter of the voicecoil matters :-) No. Yes! No! Stop it! But he started! No matter who started, I finish it! :-) | Mmmkay...Well, as they say in Holland; If 2 dogs are fighting for a bone, the 3rd one takes it home ;) {Als 2 honden vechten om een been, dan gaat de 3de er rap mee heen...}.
The quality of PD isn't for discussion, that's for sure ;)
However the 18LW1400 has a 4" VC, 5" VC for the PD, both have a voice coil winding height of 25 mm, the 18LW1400 has a gap depth of 15 mm, whereas the gap depth of the PD 186 is 9 mm.
15*4 = 60, 9*5 = 45--> 4:3 In the favor of the 18Sound.
The area of the gap depth is able to soak the heat radiation of the VC away, a larger area means more heat is able to escape into the cooling system/basket/magnet.
Both the 18LW1400 and the PD 186 where originally rated at 700 Wrms, the PD is probably a bit more conservative rated. I suppose they're quite up to one another.
Best regards Johan
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Posted By: Crashpc
Date Posted: 20 October 2009 at 7:56am
This doesn't make people stop using it at power I told....
------------- Nikon and Canon people should not be married to each other. Why did you let this happen?
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Posted By: MusicXtra
Date Posted: 26 October 2009 at 11:33pm
And they are finished

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Posted By: MusicXtra
Date Posted: 26 October 2009 at 11:38pm
And here's the back side with two NL8 and one NL4 speakon.

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Posted By: audioalliance
Date Posted: 09 November 2009 at 6:59pm
jeeez they look madddddd
------------- http://www.myspace.com/audioalliance
music is our mission
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Posted By: Ibex
Date Posted: 15 November 2009 at 3:18pm
Progrezz wrote:
Why does everyone on this forum look down on bass reflex cabs? As far as sound goes, a BR is still the only way to go. Look at Meyer, L'Acoustics, EAW, ... Every sub in a live situation you'll see is a BR. Horns are only suitable for certain types of dance music and people only use it because of the high sensitivity and throw. But if you look at the Meyer 700-hp for instance, which in waffles oppinion is nothing more than a pain-ass reflex cab and hell it is, but those things sound mighty-fine, have a sensitivity of 110db, go awefully deep and throw pretty damn far. It's just one of the reasons why brands like Meyer and Eaw are still in business. |
Referring to the Meyer Sound 700-HP Datasheet:
700-HP Specifications: Maximum Peak SPL: 139 dB peak Dynamic Range: >110 dB ....that's not equal to the sensitivity! Output Power: 2250 W (1125 W/channel)
Amplifier gain: 4500W = 36.5dB peak Sensitivity: 139dB - 36.5dB = 102.5dB
cheers 
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Posted By: Teunos
Date Posted: 15 November 2009 at 3:26pm
Ibex wrote:
Amplifier gain: 2250W = 33.5dB Sensitivity: 139dB - 33.5dB = 105.5dBcheers  |
And the HP700 is a double 18, so probably 4 ohms, and sensitivity will also be lower I reckon.
------------- Best regards, Teun.
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Posted By: Ibex
Date Posted: 15 November 2009 at 3:35pm
Teunos wrote:
Ibex wrote:
Amplifier gain: 4500W = 36.5dB peak Sensitivity: 139dB - 36.5dB = 102.5dBcheers  |
And the HP700 is a double 18, so probably 4 ohms, and sensitivity will also be lower I reckon.
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double 4 ohm chassis, each amp channel loaded with 4 ohm
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Posted By: Ibex
Date Posted: 15 November 2009 at 3:39pm
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Does anyone know what drivers Meyer are using in their subs respectively their line arrays?
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Posted By: Pasi
Date Posted: 09 July 2010 at 5:32pm
Ibex wrote:
Does anyone know what drivers Meyer are using in their subs respectively their line arrays?
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Yes. Their own drivers. According to official story.
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Posted By: dispatcher
Date Posted: 10 July 2010 at 7:04pm
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NIse sub. please plan building.
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Posted By: josé
Date Posted: 22 November 2011 at 9:06pm
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estou a procura de um sub compacto p/ 2 auto falantes de 18 c/ freguencia de 25 a 200hz c/ 130 bd alguem tem
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Posted By: skillz.tb
Date Posted: 12 February 2013 at 3:50pm
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Where can I get the eaw sb1002 plan
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Posted By: skillz.tb
Date Posted: 12 February 2013 at 4:46pm
Where I get the eaw sb1002 plan
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Posted By: djeddie
Date Posted: 12 February 2013 at 8:37pm
Send EAW an email, they're a very helpful company when it comes to giving out plans.
------------- Chas n Dave : it's like Drum and Bass but with beards. E=mc² ±3dB
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Posted By: Cienfueguero
Date Posted: 17 October 2014 at 11:59am
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Hi, this sub is very interesting, i'm going to building a new 18" sub anche you post the plans. Thank you
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Posted By: saintzoilus
Date Posted: 16 September 2017 at 2:35am
This speaker seems to be the sw218-c
https://i.pinimg.com/originals/02/75/d2/0275d26d9fef812e14e8c41b9094412c.jpg
I say this since there seems to be no center port on this design while the eaw sb1000's have a center port that goes back to about 6 inch from the back of the case.
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Posted By: saintzoilus
Date Posted: 16 September 2017 at 2:37am
I say that from first hand experience, I've taken the grill off a eaw sb1000 and stuck my hand down the center port to see how far back it went.
I wish I still had access to them since I am now looking at possibly building some but the only designs I can find around are the sw218-c and not the sb1000.
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Posted By: saintzoilus
Date Posted: 16 September 2017 at 2:53am
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Can you comment on if there is the board on the inside that seperates the two sides or if both sides are joined together without that seperation board?
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