Home cooked headphones - Come one come all! Anyone welcome

Jul 22, 2024 at 9:02 AM Post #91 of 254
@buidoimiennui
Made a very nice F1-style headphone. link

Aliexpress has 70mm headphone drivers but I dont want to risk that much dough especially since they arent exactly a new experience to me since having owned Blon BL30 which uses a variation on these Ali drivers, and have owned MA900. Anybody know what’s wrong with just using loudspeaker drivers aside from weight? Most loudspeaker drivers are 4-8ohms, that would be a problem for headphone amps? Then I can just use a speaker amp, right?


Hi Phillimon, your idea above is very good. I think you should look for Fostex's 50mm Bio-cellulose driver, or RP-HD10's 50mm Mdf driver. I think these 2 types of drivers are suitable for your project. Drivers from aliexpress are of extremely low quality. I've tried them before. If you use speakers, the 3.5 or 4.4 port does not have enough voltage, and most full-range speakers do not produce deep bass with traditional headphone drivers. Hope you keep updating your Diy projects!
 
Jul 22, 2024 at 9:30 AM Post #92 of 254
Axel Grell @xlcans kindly commented on my Sigma-style project. Ive been mostly leaving out commenting on the subjective sound qualities of my projects, so let me state my Sigma-style is terrible while OAE1 does sound great.

I feel my first build sounded good so wrote some impressions (link) but just not in this thread.
I think you just need to adjust the angle towards the ear more 15-20 degrees. There will definitely be change.
 
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Jul 22, 2024 at 9:48 AM Post #93 of 254
Some walls added. Bass + warmth improved but needs more. When I partially cover up the holes at back of the cups the bass improves dramatically. Interestingly wide stage, but if I seal the cups too much then bass becomes a bit reverbery like if my head were inside a drum. Hmmm



Ill continue to experiment.
Hello Philimon. Your project reminds me of the R10 product. r10 has a very special cup structure. It curves to simulate two walls on both sides of a concert hall. Helps sound spread and create a wide sound field throughout the grill surface areas. I suddenly thought that if your Sigma project adjusts the cup as I illustrated, it might have a special soundstage. yellow is cup. The dashed line is the gap. red driver. blue ears.

I think if we were neighbors, we would definitely have many ideas to implement together!
 
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Jul 22, 2024 at 11:04 AM Post #94 of 254
Hi buidoimiennui!

Drivers from aliexpress are of extremely low quality.
Please explain how so if you will? Im not so experienced as you can tell.

you use speakers, the 3.5 or 4.4 port does not have enough voltage,
So use speaker amp with appropriate connectors if using speaker drivers?

and most full-range speakers do not produce deep bass with traditional headphone drivers.
Why? Since I dont know I was thinking of buying a few cheap pairs to try for myself.

yellow is cup. The dashed line is the gap. red driver. blue ears.
I dont see the image youre referring to.

I think if we were neighbors, we would definitely have many ideas to implement together!
Hello neighbor on the internet which is sometimes better than irl neighbor. Lets go!
 
Jul 22, 2024 at 12:07 PM Post #95 of 254
Hi buidoimiennui!


Please explain how so if you will? Im not so experienced as you can tell.


So use speaker amp with appropriate connectors if using speaker drivers?


Why? Since I dont know I was thinking of buying a few cheap pairs to try for myself.


I dont see the image youre referring to.


Hello neighbor on the internet which is sometimes better than irl neighbor. Lets go!
The so-called biological driver, from aliexpress uses a type of diaphragm that is too soft, this leads to inaccurate sound, the diaphragm needs to have a certain stiffness. Furthermore, the so-called biofilm is also softer than Fostex's membrane. There is nothing on aliexpress that can be trusted other than headbands. sorry I forgot to add a description.

yellow is cup. The dashed line is the gap. red driver. blue ears.

Screenshot_20240722-204141_Samsung Notes-01.jpeg
 
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Jul 22, 2024 at 12:15 PM Post #96 of 254
The so-called biological driver, from aliexpress uses a type of diaphragm that is too soft, this leads to inaccurate sound, the diaphragm needs to have a certain stiffness. Furthermore, the so-called biofilm is also softer than Fostex's membrane. There is nothing on aliexpress that can be trusted other than headbands. sorry I forgot to add a description.

Interesting! How do you know aliexpress bio membranes are less stiff than Foster or Sony? Also, why do you refer to as “so-called biofilm”? Sorry if this subject has been covered elsewhere.

In the diagram, are you suggesting I place the driver within the cups instead of let rear-side be outside? A major departure from Sigma-style, but perhaps would provide the missing bass, thanks. The rest looks good to me. I will try that.
 
Jul 22, 2024 at 12:23 PM Post #97 of 254
Interesting! How do you know aliexpress bio membranes are less stiff than Foster or Sony? Also, why do you refer to as “so-called biofilm”? Sorry if this subject has been covered elsewhere.

In the diagram, are you suggesting I place the driver within the cups instead of let rear-side be outside? A major departure from Sigma-style, but perhaps would provide the missing bass, thanks. The rest looks good to me. I will try that.


I have personally compared 2 types of membranes from Fostex and 1 type from Aliexpress. I don't own a Sony yet so I can't comment. but Fostex's type is twice as tough. the so-called biofilm from aliexpress, I'm not sure if the production method is the same as Fostex, or is it a type of paper with drawn lines.

To increase the bass we can use thick felt paper. I often use felt paper used to absorb ink, made by calligraphers. They increase ceiling sound very well. Sorry my English is bad so I used a machine translator.
 
Jul 22, 2024 at 9:05 PM Post #100 of 254
Working my way to the closed-back @buidoimiennui described but along the way fitted 45degree angle to Sigma-style. I could add a hinge to make the driver baffle rotate to any degree but might have to move driver slightly further away from ears to accommodate but we'll see later.

Screen Shot 2024-07-22 at 5.57.48 PM.png

Sorry Philimon, I think there is nothing bad about being smart when we acknowledge and learn from the knowledge or ideas of our predecessors. If you want to be able to adjust the position of the driver, why don't you try creating a replycar like mysphere or YHD-1, they are completely open, much more open than Sigma, and the driver can be located anywhere we want.
 
Jul 22, 2024 at 9:26 PM Post #102 of 254
Have you tried wearing them on your head, when the driver is in a position 90dg like this?
You mean Sigma-style? Yes. Not enough bass (if sealed then enough bass but needs help controlling reverb) though which is why I will try a closed back version kinda like you described.

You mean YHD-1? They dont fold outward, only inward. Was meant for portable stowage.
 
Jul 23, 2024 at 3:14 AM Post #103 of 254
Hello Philimon. Your project reminds me of the R10 product. r10 has a very special cup structure. It curves to simulate two walls on both sides of a concert hall. Helps sound spread and create a wide sound field throughout the grill surface areas. I suddenly thought that if your Sigma project adjusts the cup as I illustrated, it might have a special soundstage. yellow is cup. The dashed line is the gap. red driver. blue ears.

I think if we were neighbors, we would definitely have many ideas to implement together!

I've been following your posts and interesting projects. It's always entertaining to see the "modders" who do deep surgery. Although most projects of such magnitude is not always successful, the lessons from the sacrificed headphones lead to progress

I iremember the crazy ones who drilled into their d7000 cups. Looked liked absolute headphone gore. Yet now you see the open back biodynas.

I saw your post on Z1R and wood cups. Funny but i saw diy shell which looked like z1r cups.

1721718385368.png




Interesting! How do you know aliexpress bio membranes are less stiff than Foster or Sony? Also, why do you refer to as “so-called biofilm”? Sorry if this subject has been covered elsewhere.

In the diagram, are you suggesting I place the driver within the cups instead of let rear-side be outside? A major departure from Sigma-style, but perhaps would provide the missing bass, thanks. The rest looks good to me. I will try that.

I wonder if he poked them. I have poked aurvana live drivers. Those 40mm drivers are nice. I Just wished they were easier to extract.

I remember in one review comparing the r10 vs cd3000, the reviewer was talking about the composition being different resulting in different stiffness rating in context of elastic modulus and he gave rating in GPa... gigapascals? Sorry I'm not scientist. But stiffness and dampening factor difference are present with the different biocellulose and biodyna and biofibre type id imagine

Focal is awesome in that they release the information about thickness of diaphragm . Surround thickness . Materials etc.

E.g why beryllium was chosen as their flagship material vs magnesium/aluminum in context of "speed" advantage from low mass, And stiffness/ dampening factors

Please take this info as info from someone with weak science background. But just hobbyist looking deep into trying to understand the audio science. XD
 
Jul 23, 2024 at 3:24 AM Post #104 of 254
You mean Sigma-style? Yes. Not enough bass (if sealed then enough bass but needs help controlling reverb) though which is why I will try a closed back version kinda like you described.

You mean YHD-1? They dont fold outward, only inward. Was meant for portable stowage.

The sigma magic happens from the reflections from this weird yellow material. It reflects and dampens the sharpness resulting in a very warm and smooth presentation.

Without the wool or glass fibre type material it doesn't work.

There was another thread on here where someone made a wooden sigma shell.

to add to first point.. the only material I've seen similar to the stax yellow foam are the glass micron disc often found in Japanese headphones but not sure where to get in bulk

1721719290613.png


Others have used some glass mineral type wools. But iwould research safety of them.

I'm not sure the toxicity of stax wool... but sound is good so ... :p
 
Jul 23, 2024 at 6:46 AM Post #105 of 254
Slightly off-topic, but for those that 3D print, what printer do you use?

I bought an Ender S1 Pro last year and I've upgraded it with Klipper and tinkered with it but still couldn't get a consistent, reliable print on the first attempt. I'm getting tempted to go for a Bambu A1 and be done with it.
 

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