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Multi-Way Conventional loudspeakers with crossovers

Shadzi - Bagby Ceramico
Shadzi - Bagby Ceramico
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Old 18th February 2020, 06:31 PM   #1
Ugg10 is offline Ugg10  United Kingdom
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Default Shadzi - Bagby Ceramico

Anyone built or heard the Ceramico speakers from Java’s Shadzi and Jeff Bagby using the SB CAC drivers and 26CDC tweeter?

SB Acoustics Ceramicos Speaker Project by Javad Shadzi & Jeff bagby | Diyaudioparts

Crossover looks very simple, all standard 2nd order at approx. 200hz and 2800hz (single cap and coil on each crossover) with inverted mid and parallel twin 8” woofers in a 2cu.ft sealed box. I have done a quick boxsim model and it all checks out nicely and phase tracks extremely well.

All comment would be useful. Thanks in advance.
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Old 18th February 2020, 06:51 PM   #2
Zvu is offline Zvu  Serbia
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If you look at measurements for Revel Performa F228Be you will see that much steeper acoustic slopes are used, as they should because of the cone breakups. Woofers in F228Be are -40dB at 1kHz unlike Ceramicos that has breakups for woofers and mids only at -20dB. I am not sure that those don't have a certain sound character/colorations because of it. I am very sensitive to cone resonances so i'd probably pass or redesign the crossover completely. I'd use at least 4th order crossover slopes with those drivers.

Revel Performa F228Be loudspeaker Measurements | Stereophile.com
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Last edited by Zvu; 18th February 2020 at 07:03 PM.
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Old 18th February 2020, 07:06 PM   #3
Ugg10 is offline Ugg10  United Kingdom
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Thanks @Zvu, will look into that.
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Old 18th February 2020, 08:02 PM   #4
Juhazi is offline Juhazi  Finland
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I don't worry about cone resonances, responses look very good!

Click the image to open in full size.

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Old 18th February 2020, 08:20 PM   #5
Zvu is offline Zvu  Serbia
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Even at an angle of 60 degrees breakup resonances remain at SPL level of pistonic operation of the woofer and midrange. How can that be good ?
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Old 20th February 2020, 01:45 AM   #6
ontariomaximus is offline ontariomaximus  Canada
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I would also like hear more about these. Just working on a pair of Travelers atm which uses the same 5" ceramic mid
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Old 20th February 2020, 02:53 AM   #7
jholtz is offline jholtz  United States
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Quote:
Originally Posted by ontariomaximus View Post
I would also like hear more about these. Just working on a pair of Travelers atm which uses the same 5" ceramic mid
I'm looking forward to getting your feedback on sound quality when you get them done.

I love to see pictures too!

Jim
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Old 20th February 2020, 03:59 AM   #8
mordikai is offline mordikai  United States
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Quote:
Originally Posted by jholtz View Post
I'm looking forward to getting your feedback on sound quality when you get them done.

I love to see pictures too!

Jim
Have you guys released details of this design yet?
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Old 20th February 2020, 04:21 AM   #9
isaeagle4031 is offline isaeagle4031  United States
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The Ceramicos sounded fantastic. The crossover is excellent as is. There is no evidence of cone breakup audible or otherwise.
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Old 20th February 2020, 04:35 AM   #10
jholtz is offline jholtz  United States
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Quote:
Originally Posted by mordikai View Post
Have you guys released details of this design yet?
It's available through Meniscus as a kit.

The Travelers Loudspeaker Kit - Meniscus Audio

Jim
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