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Multi-Way Conventional loudspeakers with crossovers

SynTripP: 2-way 2-part Virtual Single Point Source Horn
SynTripP: 2-way 2-part Virtual Single Point Source Horn
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Old 5th July 2019, 10:16 AM   #791
JumeirahSoundSystem is offline JumeirahSoundSystem
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Quote:
Originally Posted by weltersys View Post
Noah,

If Mr. Speakers wants to share his files, I'm OK with that.
If you would like to compare a standard plywood build and a 3D printed version, go ahead!

Cheers,
Art
That's great, thanks for your blessing. Will check in with Mr. Speakers and see how they feel about sharing, then come back with some comparison results once I get both built.

Much obliged!

Best,
Noah
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Old 17th July 2019, 01:27 AM   #792
MrSpeakers is offline MrSpeakers  United States
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We're just about done, and sure, when we're finished we'll be happy to share STL files for print, cut sheets, and laser patterns. The project got slowed down due to a combination of parent-care and worked getting BUSY, but that's life for ya.

We designed the box to screw together so assembly is super fast, and the rear panel is easily removed to service drivers, etc.

Printing the parts takes a while, and a good large format printer. We ended up using a carbon fiber filament that was dimensionally stable when cooling to keep the part on the platform, it's not a print job for newbies.

Cutting the wood with the laser was done on a 100W CO2 with a 5" lens, anything shorter was char-o-rama. We're debating whether to sand and seal the exterior to let the wood show, or just basic sound-system-black.
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Old 17th July 2019, 05:15 PM   #793
buggers is offline buggers  United States
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I vote for let the wood show cause there is too many black and white speakers in the world.
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Old 21st July 2019, 11:19 PM   #794
MrSpeakers is offline MrSpeakers  United States
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Default Done!

We're super happy with how these came out. The sound is very clean and coherent, the phase results show that really clearly, they're totally linear through the low mids through the middle of the highs.

EQ was not terribly complex, we're currently using a MiniDSP and it took a few hours to work it and feel it was pretty well optimized. We used a simple combination of shelves and one or two EQ points on the mids and highs and came up with the results shown below.

For curiosity we'll be testing the DIRAC impulse response optimization soon.

We loved the way the bamboo came out, and the black cuts from the laser gave it a slick looking trim, so we left the screws exposed, and ran with an oil-based wood clear coat. Bamboo is super hard, we'll see how that works out over time.
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File Type: jpg IMG_0738-small.JPG (165.2 KB, 148 views)
File Type: png SyntripP with Dan Tuning July 21.png (132.1 KB, 150 views)
File Type: png SyntripP System Phase 7:21 Tune.png (114.0 KB, 142 views)
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Old 22nd July 2019, 04:08 AM   #795
bwaslo is offline bwaslo  United States
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SynTripP: 2-way 2-part Virtual Single Point Source Horn
I like. Looking forward to the plans and the STLs
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Old 22nd July 2019, 10:50 AM   #796
mwmkravchenko is offline mwmkravchenko  Canada
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SynTripP: 2-way 2-part Virtual Single Point Source Horn
Quote:
Originally Posted by bwaslo View Post
I like. Looking forward to the plans and the STLs

They are actually in this thread a little way back there Mr. Waslo Bill Sir.


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Old 22nd July 2019, 12:07 PM   #797
xrk971 is online now xrk971  United States
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SynTripP: 2-way 2-part Virtual Single Point Source Horn
Very nice work, MrSpeakers!

Can you please share with us the name and model do 3D printer you used and the material? Is it continuous carbon fiber filled nylon filament or chopped carbon? Or did you use a 3D print shop?

Thanks,
X
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Old 22nd July 2019, 02:35 PM   #798
USRFobiwan is offline USRFobiwan
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SynTripP: 2-way 2-part Virtual Single Point Source Horn
That looks awesome! Great Job MRSpeaker.
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Old 22nd July 2019, 10:55 PM   #799
MrSpeakers is offline MrSpeakers  United States
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Quote:
Originally Posted by xrk971 View Post
Very nice work, MrSpeakers!

Can you please share with us the name and model do 3D printer you used and the material? Is it continuous carbon fiber filled nylon filament or chopped carbon? Or did you use a 3D print shop?

Thanks,
X
We used a heavily modified 3D printer with a 300 x 300 mm plate, modified firmware, and highly customized print head. There's no way most people would reproduce this readily, better to spend $700-1000 for a proper large format printer that doesn't need the customizations.

The filament was chopped carbon fiber PETG. A good printer would have a 400mm x 400mm base, smaller bases will have trouble holding the temp uniform to the edges, increasing the risk of lift. We used a little cyanocrylic to tack the corners down to the plate.
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