Fast, fun, Inexpensive OB project - Page 85

heinz1964 · 22nd February 2013, 07:22 AM

Hi

I have one Beyma 18 G550 woofer will it work for the HE?

Before I run out and invest in another one I would like to know if it will work out, another thing is that the Beyma I allready have is about 15 years old. I might have used it for about 50 hours at quit low levels. Will it match with a new One?

best regards

uwe

Pano · 22nd February 2013, 11:59 AM

Hans - that's a great looking build.

Glad you built them and like them. Please keep us informed of how they change with some driver break in.

bjuck57 · 23rd March 2013, 03:01 PM

Here comes an update after 150+ hours with my Ultras. I'm VERY pleased with the performance of the Ultras. I've becomed addicted to the smooth and open sound and the very powerful, low octave bass. I heartily recommend building or buying these excellent speakers from John (Welcome To Manzanita Audio Solutions . Open Baffle Dynamic Speaker Designs).
\Hans in Holmsund, Sweden.

almuse · 29th March 2013, 08:47 AM

Start my Manzanita.
Attachment 339122

Pano · 29th March 2013, 09:22 PM

Hans, thanks for the report! Always good to hear back from a long time living with the speaker. Glad you like it.

Almuse, the attachment didn't work.

John Busch · 29th March 2013, 11:20 PM

Hanns....

Thanks for sharing your opinion of the Ultra build! Know it was a lot of work to obtain the GRS in Sweden.

I fear a lot of potential builders have difficulty believing how good such a simple design and build can be. And they worry about the intrinsic low efficiency. However, if you run the numbers and measure most designs that can really play flat into the upper 20's, you will usually find one of two outcomes.

1) The enclosure is the size of a double door refrigerator, or... 2) The true efficiency is similar if not less than the Ultra. As best I can measure, the Ultra is around 84-85 dbw. And that is all the way down. No roll-off!

Provide a clean 20-40 watts per channel in a typical domestic setting.... for most music, you have more than enough output.

Funny thing about the Ultra is the tonal purity of the bass. It's all most creepy to hear true fundamentals with out the usual doubling nearly ALL speakers regardless of design produce below 50 Hz or so. That is why the Ultra low end is SO addictive... as you observered.

albertli · 2nd April 2013, 03:41 AM

John, Pano,

Would you kind enough to point me to where I could find specs n BOM of the Ultra. I'd like to build a pair for myself.
Thanks

Albert

RKH · 2nd April 2013, 05:13 AM

+1 ... still trying to decide which one to go for

Quote:

Originally Posted by albertli

John, Pano,

Would you kind enough to point me to where I could find specs n BOM of the Ultra. I'd like to build a pair for myself.
Thanks

Albert

ruinevil · 2nd April 2013, 06:07 PM

Albertli: BOM for the Ultra is on The best affordable DIY open baffle loudspeaker I've listened to so far. and the design/crossover is on the next page. The components at PE now cost $208... with the wood being extra.

Pano, John: The 20mH inductors are backordered at PE. Any replacements?

Pano · 2nd April 2013, 07:40 PM

Madisound, maybe? I think John has tweaked the crossover since then, we should get him to chime in.

29th March 2013, 11:20 PM	#846
John Busch diyAudio Member Join Date: Oct 2007 Location: Hill country, Texas	Nice to know you are enjoying the fruits of your efforts Hanns.... Thanks for sharing your opinion of the Ultra build! Know it was a lot of work to obtain the GRS in Sweden. I fear a lot of potential builders have difficulty believing how good such a simple design and build can be. And they worry about the intrinsic low efficiency. However, if you run the numbers and measure most designs that can really play flat into the upper 20's, you will usually find one of two outcomes. 1) The enclosure is the size of a double door refrigerator, or... 2) The true efficiency is similar if not less than the Ultra. As best I can measure, the Ultra is around 84-85 dbw. And that is all the way down. No roll-off! Provide a clean 20-40 watts per channel in a typical domestic setting.... for most music, you have more than enough output. Funny thing about the Ultra is the tonal purity of the bass. It's all most creepy to hear true fundamentals with out the usual doubling nearly ALL speakers regardless of design produce below 50 Hz or so. That is why the Ultra low end is SO addictive... as you observered. __________________ Commercial Website: http://www.manzanitaaudiosolutions.com/index.html

2nd April 2013, 03:41 AM	#847
albertli diyAudio Member Join Date: Nov 2004 Location: Vancouver	Ultra John, Pano, Would you kind enough to point me to where I could find specs n BOM of the Ultra. I'd like to build a pair for myself. Thanks Albert

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22nd February 2013, 07:22 AM	#841
heinz1964 diyAudio Member Join Date: Jan 2007	Hi I have one Beyma 18 G550 woofer will it work for the HE? Before I run out and invest in another one I would like to know if it will work out, another thing is that the Beyma I allready have is about 15 years old. I might have used it for about 50 hours at quit low levels. Will it match with a new One? best regards uwe

22nd February 2013, 11:59 AM	#842
Pano diyAudio Moderator Join Date: Oct 2004 Location: North Carolina Blog Entries: 4	Hans - that's a great looking build. Glad you built them and like them. Please keep us informed of how they change with some driver break in.

23rd March 2013, 03:01 PM	#843
bjuck57 diyAudio Member Join Date: Nov 2010 Location: Holmsund	Here comes an update after 150+ hours with my Ultras. I'm VERY pleased with the performance of the Ultras. I've becomed addicted to the smooth and open sound and the very powerful, low octave bass. I heartily recommend building or buying these excellent speakers from John (Welcome To Manzanita Audio Solutions . Open Baffle Dynamic Speaker Designs). \Hans in Holmsund, Sweden.

29th March 2013, 08:47 AM	#844
almuse diyAudio Member Join Date: May 2003 Location: cq	Start my Manzanita. Attachment 339122

29th March 2013, 09:22 PM	#845
Pano diyAudio Moderator Join Date: Oct 2004 Location: North Carolina Blog Entries: 4	Hans, thanks for the report! Always good to hear back from a long time living with the speaker. Glad you like it. Almuse, the attachment didn't work.

2nd April 2013, 06:07 PM	#849
ruinevil diyAudio Member Join Date: Mar 2013 Location: New York	Albertli: BOM for the Ultra is on The best affordable DIY open baffle loudspeaker I've listened to so far. and the design/crossover is on the next page. The components at PE now cost $208... with the wood being extra. Pano, John: The 20mH inductors are backordered at PE. Any replacements?

2nd April 2013, 07:40 PM	#850
Pano diyAudio Moderator Join Date: Oct 2004 Location: North Carolina Blog Entries: 4	Madisound, maybe? I think John has tweaked the crossover since then, we should get him to chime in.