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My 3D printed full-range project
My 3D printed full-range project
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Old 15th August 2019, 10:33 PM   #11
bradleypnw is offline bradleypnw
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Those look great. 3D printing is amazing.
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Old 16th August 2019, 12:58 AM   #12
aspringv is offline aspringv  Australia
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My 3D printed full-range project
Good work! That's pretty great.
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Old 16th August 2019, 03:09 AM   #13
aspringv is offline aspringv  Australia
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My 3D printed full-range project
And to think I just bought myself a 3d printer...
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Old 16th August 2019, 04:54 AM   #14
Nenola is offline Nenola  Finland
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Originally Posted by singaud View Post
Someone also suggested I try printing these without any seam, as one big solid piece, to improve the smoothness of the internal geometry and eliminate the need for the gasket in between.
I've understood that a irregular internal surface is a good thing in these "roundish" designs? I would leave it as is, or if you want to, you could try some diffuser structure inside. Of course you need to have a measuring kit if you want to go that far in tweaking. Those kind of modifications can be hard to hear, or too easy to hear (placebo)
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Old 16th August 2019, 08:53 AM   #15
Spike415 is offline Spike415  United Kingdom
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Hello Singaud

It is a nice project you have here, and I have seen your kickstarter campaign which seems to be going well for you so far. Wish you the best of luck!

What did you do to prepare for the kickstarter launch? Also what wood like filament are you intending to use. Does it have wood particles in it or is it like Polywood which mimics its properties without any worries about clogging nozzles?

Dayton PS95-8 is a solid driver choice. Lightweight, low inductance, good high frequency control and at a decent price.

Paul
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Old 16th August 2019, 09:07 AM   #16
avtech23 is offline avtech23  Australia
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My 3D printed full-range project
Love the design Singaud! Very inspiring.

When you say that the design uses lots of filament..how much roughly would you say they consume per enclosure?

I've got my eyes on a 3d printer at the mo but want to gauge how much material cost would be.
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Old 16th August 2019, 11:54 AM   #17
xrk971 is offline xrk971  United States
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Very nice project singaud! Thanks for telling us about “wood” filament and I would expect it sounds better due to the built in dampening that occurs when a composite material is used. Sound waves don’t travel as far in a mixed composite because of the many interfaces that are impedance mismatches for wave propagation - hence energy is absorbed as heat.

There was another thread where we looked at printing the “stuffing” by making high porosity but fine grained in-fill. You can use less wall material on shell and still be strong plus the filament now is your polyfill. You need room for rear basket and some space for binding posts and area around entrance to port.
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Old 16th August 2019, 02:44 PM   #18
singaud is offline singaud  United States
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Originally Posted by aspringv View Post
And to think I just bought myself a 3d printer...
let me know if you have any troubles with printing, I have years of experience developing the machines themselves and I'm happy to help

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Originally Posted by Nenola View Post
I've understood that a irregular internal surface is a good thing in these "roundish" designs? I would leave it as is, or if you want to, you could try some diffuser structure inside. Of course you need to have a measuring kit if you want to go that far in tweaking. Those kind of modifications can be hard to hear, or too easy to hear (placebo)
Perhaps, I considered adding a spiked design to the inside like the pyramidal dampening material you see in anechoic chambers. I'm worried that the added geometry might drag my computer to a crawl though... For now I'm testing internal filler materials. More on that at the bottom of post...

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Originally Posted by Spike415 View Post
Hello Singaud

It is a nice project you have here, and I have seen your kickstarter campaign which seems to be going well for you so far. Wish you the best of luck!

What did you do to prepare for the kickstarter launch? Also what wood like filament are you intending to use. Does it have wood particles in it or is it like Polywood which mimics its properties without any worries about clogging nozzles?

Dayton PS95-8 is a solid driver choice. Lightweight, low inductance, good high frequency control and at a decent price.

Paul
Thanks for the kind words, and yea it's exciting! I was avoiding talking about the Kickstarter here for fear of running up against the ad rules on the forum, but since you've outed me I did a lot of local networking and "focus testing" at bars, gatherings, meetups, etc. Made contacts with suppliers for most of my components and materials so I know I'm getting manageable prices on components, made a whole bunch of examples to test my production times to make sure I could deliver. I have a LOT of 3D printers from my last job, right now I'm going through and making sure they're all in running order. I honestly probably should have done more advance marketing but the campaign seems to be running well as you said so fingers crossed!

The wood material has real wood fiber, I have had a couple instances of the material getting worn out in the extruder side and then getting burned in the nozzle causing a bad blockage and needing to toss the nozzle out. It's a possibility but I've learned to avoid it pretty successfully just through setting up my prints to be pretty conservative in terms of speed and other settings.

Quote:
Originally Posted by avtech23 View Post
Love the design Singaud! Very inspiring.

When you say that the design uses lots of filament..how much roughly would you say they consume per enclosure?

I've got my eyes on a 3d printer at the mo but want to gauge how much material cost would be.
Most filament can be had cheap but the stuff I'm using is about $35/kg retail price. I use it because it has the highest percentage of wood in the material, other similar materials I have used in the past can be found for $30/kd. For this design, one whole speaker uses about a pound/500g of wood... or $17-ish dollars worth.

Quote:
Originally Posted by xrk971 View Post
Very nice project singaud! Thanks for telling us about “wood” filament and I would expect it sounds better due to the built in dampening that occurs when a composite material is used. Sound waves don’t travel as far in a mixed composite because of the many interfaces that are impedance mismatches for wave propagation - hence energy is absorbed as heat.

There was another thread where we looked at printing the “stuffing” by making high porosity but fine grained in-fill. You can use less wall material on shell and still be strong plus the filament now is your polyfill. You need room for rear basket and some space for binding posts and area around entrance to port.
Thanks! I'll search for that post you're talking about, sounds interesting.

Tested something I've been curious about for a while this morning... My wife got a subscription to this food delivery service that uses recycled shredded denim to insulate the food in their boxes. I looked the stuff up and a lot of people use it for homes because its a good insulator and also very sound dampening. I was curious how this would work in place of polyfill, so I ran some REW tests to check it out.

The first attached image is with no filler, the second with poly fill, and the third with denim. I think I kept the setup the same for all tests, but I did one of them last night so I may have missed something.
Attached Images
File Type: jpg nofill.jpg (191.8 KB, 58 views)
File Type: jpg REW test 2.jpg (190.5 KB, 57 views)
File Type: jpg denim.jpg (194.0 KB, 57 views)
File Type: jpg image_67229953.jpg (1,002.4 KB, 58 views)

Last edited by singaud; 16th August 2019 at 02:46 PM.
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Old 16th August 2019, 06:12 PM   #19
xrk971 is offline xrk971  United States
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Try melamine miracle eraser sponges. Aka generic BASF “Basotect”.

Sound Damping and absorption material
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