18" BR 18XL2000
Printed From: Speakerplans.com
Category: Plans
Forum Name: Ported Enclosures
Forum Description: Post all your reflex and bandpass and 'other' boxes with holes in stuff here...
URL: https://forum.speakerplans.com/forum_posts.asp?TID=108042
Printed Date: 26 March 2026 at 3:14pm
Software Version: Web Wiz Forums 12.08 - https://www.webwizforums.com
Topic: 18" BR 18XL2000
Posted By: smitske96
Subject: 18" BR 18XL2000
Date Posted: 20 August 2023 at 1:11pm
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As some may have seen already on some fb forums, I have designed and build a new 18" BR cabinet using the Faital Pro 18XL2000 driver. Tuning is 32Hz with a port of 540cm2. Net volume is around 140L. I have some pics of the build and response, but have to find a new website to host the images. https://drive.google.com/file/d/14P076EBox-4r-2-9eovzLJWyKVUWENej/view?usp=sharing" rel="nofollow - https://drive.google.com/file/d/14P076EBox-4r-2-9eovzLJWyKVUWENej/view?usp=sharing
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Replies:
Posted By: smitske96
Date Posted: 08 January 2024 at 2:50pm
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Some info regarding this project. Feel free to build, if you have any questions, you can post them in this thread. REW outside measurement:
Link for the 3d file: https://drive.google.com/file/d/1fnq_1bcXvzdAuWz-he1j3bfjDSR7xagp/view?usp=drive_link" rel="nofollow - https://drive.google.com/file/d/1fnq_1bcXvzdAuWz-he1j3bfjDSR7xagp/view?usp=drive_link |
Posted By: turbo7
Date Posted: 19 January 2024 at 1:26pm
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Hi, looks very good. Plays deep and flat ! I cant see the picture Can you send a screenshot ? |
Posted By: MarjanM
Date Posted: 19 January 2024 at 8:19pm
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That is very inefficient. ------------- Marjan Milosevic MM-Acoustics www.mm-acoustics.com https://www.facebook.com/pages/MM-Acoustics/608901282527713 |
Posted By: smitske96
Date Posted: 19 January 2024 at 10:48pm
Won't get more efficient for a BR. Maybe lower mms driver or lower re driver to get numbers up, but a 18XL2000 in this volume is quite it. No magic.
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MarjanM wrote:Posted By: MarjanM
Date Posted: 20 January 2024 at 1:17am
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Slightly bigger cabinet will gain 2db at 40Hz. But if compact was the idea, then all good. ------------- Marjan Milosevic MM-Acoustics www.mm-acoustics.com https://www.facebook.com/pages/MM-Acoustics/608901282527713 |
Posted By: fudge22
Date Posted: 20 January 2024 at 12:23pm
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There is a nice spike in efficiency at 50Hz. |
Posted By: DMorison
Date Posted: 20 January 2024 at 1:20pm
Yup, we are all just Hofmann's bitches in the end, like it or not.
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Posted By: smitske96
Date Posted: 06 March 2024 at 9:41pm
End result with build in plate amps (i know what they resemble  ).Each sub can be used for multiple setups including 2.1.   Happy with the result, go low, but still sound tight. Currently busy with a side project to build some amp modules around my own dimensions. A lot of the current (cheaper) options have basic plates that in most cases are quite wide. But that project will take quite some time and research to get some parts at a good price and will be a whole other topic when its time.
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Posted By: VECTORDJ
Date Posted: 10 April 2024 at 5:21am
| Hi, What Plate Amp did You use???? Thanx, Vectordj |
Posted By: smitske96
Date Posted: 10 April 2024 at 11:06am
They are from OMB audio.
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Posted By: MarjanM
Date Posted: 10 April 2024 at 12:17pm
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How do you find the DSP on those? I got few amp plates to test and they just sit there on the shelv for years now. Horrible DSP. ------------- Marjan Milosevic MM-Acoustics www.mm-acoustics.com https://www.facebook.com/pages/MM-Acoustics/608901282527713 |
Posted By: smitske96
Date Posted: 10 April 2024 at 3:27pm
I have had two previous converters before using the OMB one and the OMB one did the job. Not the best DSP, but seeing what is available for consumers, not much choice. The amp modules themselves are quite ok, and for me enough choice regarding size, channel and power options. I would be fine with designing an own plate etc, but finding a suitable DSP that can be bought by less then hundreds has been quite impossible.
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Posted By: MarjanM
Date Posted: 10 April 2024 at 8:33pm
A search for the holly grail at the moment even for way more than hundreds. i am working on developing our own one because the search have proven futile. It is such an oportunity for someone that can fill the void but no one seems be grabbing the opportunity. ------------- Marjan Milosevic MM-Acoustics www.mm-acoustics.com https://www.facebook.com/pages/MM-Acoustics/608901282527713 |
Posted By: smitske96
Date Posted: 10 April 2024 at 11:17pm
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.
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Posted By: smitske96
Date Posted: 15 August 2024 at 10:16am
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So I went with some amp modules from OMB audio. First impression was good, build was quite nice, shipping was quick etc. But after some testing, problems with the DSP modules. When engaging filters, a lot of distortion and extra noise was present on the outputs. I have done several measurements with a simple mydaq to verify the problem. After reporting this to OMB, they kept pointing at user error, which was quite impossible imho. So the whole OMB story did not get any better over time. They kept pointing at user error for my problem. To solve the problem, I would need to buy 5 new CQ380 DSP modules, which I am definately not going to do. That would cost me an additional 500 euros without even knowing they solved the problem. If anyone want to know more about the problems itself, let me know via here, or send me a pm. Have done some measurements to document the problem itself.
With this in mind, I really do not have much options left. I have four plate amps which are not really usable in their current state. Maybe I will salvage the amp modules themselves and build some 19" rack amps with them etc... |
Posted By: Contour
Date Posted: 15 August 2024 at 3:42pm
| Just send them back and let them solve the problem. |
Posted By: smitske96
Date Posted: 15 August 2024 at 4:25pm
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@Contour They don't want to solve the problem on their costs. It is 100% a dsp problem and they could send me one DSP to test, but even that was to much to ask. As said before, they keep hiding behind the user error argument. So I am done with the company, and won't recommend.
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