[piotrus-g]

what in the world am I gonna build in the premium audio space, using a 300 Ω FK. maybe @piotrus-g can brainstorm it. I'm all ears as Austin Powers might have said... lol

Use 10 in parallel, now it's 30 ohm, problem solved

/s

 

[swtnate]

Well hot diggity dog! I should ask more questions. LOLOL! Thx I will give it a shot this week and see what shakes out.

 

[rudbeard]

can someone point me to some solid, well taught, and very relevant to this type of work, instructional content detailing how to create sound tubes within CAD? I use both Autodesk andShapR 3D.

I haven't found many, but here's one of someone walking through making one with bass tubes and vents in fusion360.

If you're not already into CAD, Shapr3d and Rhino are your best alternatives to Fusion360. I ditched Autodesk (glad to leave Autocad, RIP Inventor, only have to finish migrating from Fusion360) because they're a garbage company and advise doing the same. For experimentation, I've switched to Plasticity.

 

[swtnate]

I haven't found many, but here's one of someone walking through making one with bass tubes and vents in fusion360.

If you're not already into CAD, Shapr3d and Rhino are your best alternatives to Fusion360. I ditched Autodesk (glad to leave Autocad, RIP Inventor, only have to finish migrating from Fusion360) because they're a garbage company and advise doing the same. For experimentation, I've switched to Plasticity.

Ive been using ShapR for 2 years now, when designing components and universal housings. It doesnt allow cor imported meshes. So, to create custom monitors, you would need to convert mesh data to IGES, which is no small feat. At least on my machine, it max’s out the 2021 macbook’s computatonal capabilities. So, if you plan to do work on custom molds and IEMs be prepared to go all out for the newest chipset. You will need it.

 

[swtnate]

I haven't found many, but here's one of someone walking through making one with bass tubes and vents in fusion360.

If you're not already into CAD, Shapr3d and Rhino are your best alternatives to Fusion360. I ditched Autodesk (glad to leave Autocad, RIP Inventor, only have to finish migrating from Fusion360) because they're a garbage company and advise doing the same. For experimentation, I've switched to Plasticity.

Theres two or three REALLY good posts and convos in this long running thread. However, everybody’s path to Fusion is different and not all spl scans are really good quality.

 

[Wgibson]

There is no law against inefficient IEM's. Maybe not practical for production, but just quiet down the other drivers to match, that gives you flexibility to get the exact curve you want. Start with a 2 of them per side, but 4 is also easy to package.

 

[StephenJames]

I haven't found many, but here's one of someone walking through making one with bass tubes and vents in fusion360.

If you're not already into CAD, Shapr3d and Rhino are your best alternatives to Fusion360. I ditched Autodesk (glad to leave Autocad, RIP Inventor, only have to finish migrating from Fusion360) because they're a garbage company and advise doing the same. For experimentation, I've switched to Plasticity.

I love the idea of printing tubes, and learning how to do that in Fusion360, but if you go down that road, how do you incorporate dampers into the design? Are you stuck with controlling the sound with your crossover section only?

 

[rudbeard]

I love the idea of printing tubes, and learning how to do that in Fusion360, but if you go down that road, how do you incorporate dampers into the design? Are you stuck with controlling the sound with your crossover section only?

That does sound challenging. I've never done this but here are a few ways I would try out:

• Just put it at the nozzle (I can think of a lot that do this, like the Truthear Hexa)
• Print the shell in pieces and glue it together around the damper.
• space damper so it can be glued/pressed in right in front of the driver before the drivers are put in
• or print so you can glue in a tube shaped plug so the front and back volumes are the same.

 

[swtnate]

There is no law against inefficient IEM's. Maybe not practical for production, but just quiet down the other drivers to match, that gives you flexibility to get the exact curve you want. Start with a 2 of them per side, but 4 is also easy to package.

KZ is notorious for this. 8 drivers, 2 of which are firing all systems ago and 6 drivers put out signal below typically human hearing

That does sound challenging. I've never done this but here are a few ways I would try out:

• Just put it at the nozzle (I can think of a lot that do this, like the Truthear Hexa)
• Print the shell in pieces and glue it together around the damper.
• space damper so it can be glued/pressed in right in front of the driver before the drivers are put in
• or print so you can glue in a tube shaped plug so the front and back volumes are the same.

these are well intentioned but in my experience, the amount of time and added expense of placjng dampers right at the spout is negligible. The further back from the sound bore, the less effective the damper.

The simple answer is they arent really used any longer because the builder will specify to the manufacturer how they want the driver to perform. When they are incorporated, ie Shure, they have removable assemblies with the damper housed inside.

 

[Wgibson]

@swtnate 300 ohm driver, 4x parallel, zobel, 75ohm flat impedance as full range. Add lows and highs, that could get you down to 20-30ohms maybe?

Edit: zobel resistor would be 1.25 the DCR, so 93.75 ohm and that would be the max impedance value you should see.

 

[swtnate]

@swtnate 300 ohm driver, 4x parallel, zobel, 75ohm flat impedance as full range. Add lows and highs, that could get you down to 20-30ohms maybe?

Edit: zobel resistor would be 1.25 the DCR, so 93.75 ohm and that would be the max impedance value you should see.

Thats A LOT of passive components. . I’m hesitant even doing one.

 

[swtnate]

They always look like such a birds nest of crazy. Ive tried so many things to make it more neat and presentable…. Everytime Im left with this haystack of hair like estrons.

 

[mattmatt]

They always look like such a birds nest of crazy. Ive tried so many things to make it more neat and presentable…. Everytime Im left with this haystack of hair like estrons.

twist them in pairs

 

[Wgibson]

You can tape the wires to the side of the driver. Strain relief, and it lets you decide where the wires come out.

 

[itjhy]

最近给朋友做了一些耳机。模仿QDC V3和VX。
[url=https://sm.ms/image/FT1BlwIdNykrDHJ] [/url ]









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