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.
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.
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
Revel Performa F228Be loudspeaker Measurements | Stereophile.com
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I don't worry about cone resonances, responses look very good!
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
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 ?
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
The Ceramicos sounded fantastic. The crossover is excellent as is. There is no evidence of cone breakup audible or otherwise.
For that to claim you should have one with steeper slopes and other with suggested crossover for a direct comparison, and compared in known enviroment/room, of course. This way, music will come out of it but could it be better/more neutral - we'll never know. I do like the looks of Ceramicos though.
I have the breakup of a SB17NAC down about 20dB and not an issue for me but then again I'm old.
I did try a steeper xo but didn't notice any difference in this area.
I did try a steeper xo but didn't notice any difference in this area.
These are not fullrange drivers! Normal crossovers will make resonances inaudible in a multiway speaker. This is a 3-way!
If you want something better, choose Vifa paper cones of Accuton CELLs!
Just for comparison a bit more dificult 8" aluminium woofer H1208-08 L22RN4X/P
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I wonder if you could shrink down the form factor by subbing in the white SB 16Ps��
Thanks for all the comments, much appreciated. Are there any response graphs or crossover schematics (assuming no values provided) for the Traveller anywhere?
The kit is available through Meniscus and includes complete cabinet plans, crossover etc.
Contact Curt Speaker Design Works or Meniscus The Travelers Loudspeaker Kit - Meniscus Audio for more complete information regarding frequency response, impedance etc.
BTW, the Travelers are an open back mid monitor design similar to the Statements, Anthologys and Bordeaux so plan on 12" - 18" clearance around the speaker with no large objects between the speakers that will block the back sound wave.
I'll also add that any design created by Curt or Jeff Bagby will be exceptional. They both have decades of speaker designs that have been praised and compared to the best available. Build with confidence.
HTH
Jim
Contact Curt Speaker Design Works or Meniscus The Travelers Loudspeaker Kit - Meniscus Audio for more complete information regarding frequency response, impedance etc.
BTW, the Travelers are an open back mid monitor design similar to the Statements, Anthologys and Bordeaux so plan on 12" - 18" clearance around the speaker with no large objects between the speakers that will block the back sound wave.
I'll also add that any design created by Curt or Jeff Bagby will be exceptional. They both have decades of speaker designs that have been praised and compared to the best available. Build with confidence.
HTH
Jim
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Jim, many thanks, much appreciated. I am a bit limited for space so the sealed Ceramicos were of interest and seem to get comments that they work well in a range of rooms, will bear this in mind.
There is no better or worse here - just different. I do like metal cones more than paper though - but that's just my personal preference. Crossover, if not done correctly, will not make resonances inaudible.
I could never make a judgement based on listening in a venue. More so if there is a bunch of people around me. I do think that one always needs to compare everything - just for reference point.
At Revel they didn't make the crossover as they did for no reason. I just want to point that out and it is on OP to decide for himself if it makes sense. One can make Ceramicos and listen. Tweaking and redesigning the crossover is always an option - given the good quality of the drivers used. If it sounds good as is, the better.
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