[Bassiklee]

3D printing is not for hobby users, it needs lot of investment in machine , software and the UV material for printing is also expensive as compared to manual method.

Also not lot of manufactures use it has limited options in color and the surface quality is not same like with molds.

I know. That's why I asked.

 

[vladstef]

Guys, got a issue to discuss. It is well known that the bigger inner diameter of the soundbore, the better HF extension. Low inner diameters works almost as a lo pass filter limiting in the audible way HF.
On the other hand, if there is more soundbores in one earphone getting straight to the ear, the sound is more focused, detailed, clear, the soundstage is wider, instruments are more separated.
My measurements shows that the difference between 1ID and 2ID above 5kHz with the same tube length could be up to 10dB (smaller ID, quieter HF).
BUT, many pro audio companies use multi bore constructions (up to four or five soundbores in each headphone). The ID of each bore couldn't be bigger than 1mm.
And the question - how do they got so many bores, that do not affect the high frequencies making sound muddy and not clear? How do they deal with it? I have made in my opinion great construction , four drivers with three soundbores (3x2ID), that hardly fits to my really big ear canal. It will be impossible to fit it into the smaller one. The solution could be usage of smaller ID bores, but it affects sound too much right now.
Sample picture below.

Just using logics, you could either put more treble extension drivers and keep small tubes or have one larger tube with smaller tubes for drivers focusing on lower frequencies. Everything is a compromise.
I don't agree with your argument about more tubes = better sound. There is a limit to everything and I'd argue that 2 or 3 bores are optimal.

 

[Xymordos]

I don't see how more bores = better separation. Also, doesn't the extension depend on the driver placement too? In my tests, using one big bore and placing the driver randomly doesn't always yield better HF extension though.

 

[Caluub]

I'm getting close to finishing my first build and I just can't get over the HF roll-off of the GV. This is my first build and I don't have any experience with tuning BAs, but I've had pretty consistent HF roll-off throughout testing with different combinations of dampers and tube length. Would it be possible to extend my HF by adding an SWFK to my build? Has anyone done this with a GV? Would it even be worth it?

 

[NaiveSound]

Pictures please

 

[Caluub]

Pictures please

This is my current configuration. 5mm to green damper on TWFK, 7mm to red damper on HODVTEC. The tubing to bore represents the actual length when assembled. I have it out right now because I was playing around with different configurations.

 

[zeed]

Try using 2mm ID tube for the twfk and using different length/damper combinations.
You should be extent further in the >2khz region. Expect a boost of about 3-6db depending on your config.

 

[NaiveSound]

I want shell pictures

 

[Caluub]

I want shell pictures

Not looking too special yet. They came out bubble free and pretty clear but I still need to buff and polish. I've only drilled and cut the right ear. The other is still at home untouched.

 

[NaiveSound]

I absolutely love it. What material

 

[Caluub]

I absolutely love it. What material

Fotoplast S/IO. I had 5 or 6 failed shells before this. Some a lot prettier. I ended up settling on clear for my first build because I was having issues with wall thickness when I used dyes.

 

[sanekn]

Wow man those shells are looking marvelous! Great work! I never managed to have my shells be this clean and uniform

Im having uneven thickness every time and hair lines everywhere. Inside looking messy. Well im still doing something wrong obviously

 

[NaiveSound]

Gest work indeed. I want more pictures tho..
. Not enoght. Why you make me beg?

 

[Caluub]

Try using 2mm ID tube for the twfk and using different length/damper combinations.
You should be extent further in the >2khz region. Expect a boost of about 3-6db depending on your config.

I gave it a trial run with the bigger tube on the TWFK and shoved it into a comply tip and I can tell it's better. When I'm home from work I'll enlarge the bore and see how it sounds. Thank you!

 

[Caluub]

It's about to get real. I special ordered this from Oaktree and was told there would be a 2 week lead time but it came in just a few days. $162 shipped.