[furyossa]

I miss them.
It was washed away in the flood, but I used to have AKG K312P and K314P...

I'm not interested in AKG buds, but their shells. Also, I think they use a way better plastic then this Hidizs "cheap-ass" plastic
You already saw my post for AKG Y16A, I don't like sound signature, but shell has good ergonomics and material.
Too bad it's not compatible with MX500 drivers

 

[earfanatic]

Guys, I have just got my hands on this old stock. Not even opened them.

Yes, they look real!

Spoiler: Open secret source

And because You are so nice guys, I share the link if You want to spend 5,50 €.
The drawback is, it ships only to Austria or Germany.
And no one knows how many is left in stock.

 

[earfanatic]

This is the driver. 143Ohm and 148Ohm

You know what this is, don't You? No, it's not a bad camera lens!

 

[furyossa]

Guys, I have just got my hands on this old stock. Not even opened them.

Yes, they look real!

Spoiler: Open secret source

And because You are so nice guys, I share the link if You want to spend 5,50 €.
The drawback is, it ships only to Austria or Germany.
And no one knows how many is left in stock.

You bought 5pairs why do we need link when you can swap the stock cable and sell them for $25 as it once was on Ali

 

[earfanatic]

You bought 5pairs why do we need link when you can swap the stock cable and sell them for $25 as it once was on Ali

Because You are such nice guys, sharing knowledge with me, and I like You.

 

[furyossa]

New volunteer for the DIY project. I don't want to comment on how they sound because it's not worth it,
but what is here is an AKG K314 shell that has one of the best ergonomics.

At first glance, it seemed to me that these K314 shells would be compatible with PK drivers because they are small, but I was wrong.
For now, only the MX500 can be used, but with the use of glue, the metal mesh version is too big

 

[furyossa]

Right now, I'm dealing with my new pair HiFi Boy Dream that arrived a few days ago.

Spoiler: HiFi Boy Dream package

I received "rose gold" version because this was the only one in the stock. Best looking is "coffee" model, but still
buds are buds and for me is important that they sound good. At least I pay $50 and not $90
Also, they added this white 2-pin cable as gratis, a bunch of eartips, 6.35mm adapter plug and plane adapter.
There was obviously no saving here.

They have precise and clean presentation, more like IEMs. Upper mids are a bit forward, so they can cause a slightly sharper sound (no sibilance here) in some bad recordings. Instruments separation and positioning is great. Soundstage is narrower, probably because of the small (shallow) shell without back vent. There are only 3 small, not sealed vents on one side of the shell. The stem is sealed from inside to produce a more intimate sound.
All in all definitely justify its price, this is the sound expected for a price range between. $50-$100.

I'm also testing my new 3D printed "ear canal" coupler

This is the f-graph for HiFi Boy

They are very easy to detach from shell and here are some photos.

They use full foam and some thin ring foam on the border.

Here is a yellow glue that does not allow the cables to be pulled out.
This cascading shape of the interior surface is a good idea, this way reflection of back sound wave will be broken.
I think Penon use same shell for HE150Pro but with back vent.
This one only has logo on the back


I removed all glue from the shell and stem. Also added one more layer of cotton filter over foam. The change in the sound is barely noticeable, and yet I will try this driver with the MX500 shell. Upper midds is a bit too much for my taste. Any suggestion are welcome.

 

[jogawag]

Right now, I'm dealing with my new pair HiFi Boy Dream that arrived a few days ago.

Spoiler: HiFi Boy Dream package

I received "rose gold" version because this was the only one in the stock. Best looking is "coffee" model, but still
buds are buds and for me is important that they sound good. At least I pay $50 and not $90
Also, they added this white 2-pin cable as gratis, a bunch of eartips, 6.35mm adapter plug and plane adapter.
There was obviously no saving here.

They have precise and clean presentation, more like IEMs. Upper mids are a bit forward, so they can cause a slightly sharper sound (no sibilance here) in some bad recordings. Instruments separation and positioning is great. Soundstage is narrower, probably because of the small (shallow) shell without back vent. There are only 3 small, not sealed vents on one side of the shell. The stem is sealed from inside to produce a more intimate sound.
All in all definitely justify its price, this is the sound expected for a price range between. $50-$100.

I'm also testing my new 3D printed "ear canal" coupler

This is the f-graph for HiFi Boy


They are very easy to detach from shell and here are some photos.

They use full foam and some thin ring foam on the border.

Here is a yellow glue that does not allow the cables to be pulled out.
This cascading shape of the interior surface is a good idea, this way reflection of back sound wave will be broken.
I think Penon use same shell for HE150Pro but with back vent.
This one only has logo on the back


I removed all glue from the shell and stem. Also added one more layer of cotton filter over foam. The change in the sound is barely noticeable, and yet I will try this driver with the MX500 shell. Upper midds is a bit too much for my taste. Any suggestion are welcome.

I feel that by increasing the bass with Double Foam (donuts foam on full foam), you can make these upper midds less noticeable.

 

[robar]

Right now, I'm dealing with my new pair HiFi Boy Dream that arrived a few days ago.

Spoiler: HiFi Boy Dream package

I received "rose gold" version because this was the only one in the stock. Best looking is "coffee" model, but still
buds are buds and for me is important that they sound good. At least I pay $50 and not $90
Also, they added this white 2-pin cable as gratis, a bunch of eartips, 6.35mm adapter plug and plane adapter.
There was obviously no saving here.

They have precise and clean presentation, more like IEMs. Upper mids are a bit forward, so they can cause a slightly sharper sound (no sibilance here) in some bad recordings. Instruments separation and positioning is great. Soundstage is narrower, probably because of the small (shallow) shell without back vent. There are only 3 small, not sealed vents on one side of the shell. The stem is sealed from inside to produce a more intimate sound.
All in all definitely justify its price, this is the sound expected for a price range between. $50-$100.

I'm also testing my new 3D printed "ear canal" coupler

This is the f-graph for HiFi Boy


They are very easy to detach from shell and here are some photos.

They use full foam and some thin ring foam on the border.

Here is a yellow glue that does not allow the cables to be pulled out.
This cascading shape of the interior surface is a good idea, this way reflection of back sound wave will be broken.
I think Penon use same shell for HE150Pro but with back vent.
This one only has logo on the back


I removed all glue from the shell and stem. Also added one more layer of cotton filter over foam. The change in the sound is barely noticeable, and yet I will try this driver with the MX500 shell. Upper midds is a bit too much for my taste. Any suggestion are welcome.

Nice projects
To decrease high mids I'd try to increase venting (make a new vent on the back or make an existing one larger) or decrease the amount of foam inside on the driver. Probably a thinner foam on the driver plus a thin material on the vents

 

[furyossa]

I feel that by increasing the bass with Double Foam (donuts foam on full foam), you can make these upper midds less noticeable.

I tied yesterday that. The problem is the shallow shell that has a habit of pushing the middle tones forward. I noticed that when I experimented with different shells
for a 130ohm beryllium driver. Tomorrow I will try with TC-200 shell and foams. You can also cut round piece of medical mask and putt as first layer then full foam over and donut at the end. Are you tried that?

 

[furyossa]

Nice projects
To decrease high mids I'd try to increase venting (make a new vent on the back or make an existing one larger) or decrease the amount of foam inside on the driver. Probably a thinner foam on the driver plus a thin material on the vents

I was thinking about that but I didn't want to drill this shell because I have other spare shells for test.
Larger inner cavity will hell for sure.
Do you thank that basic mod (white cotton on the driver and black foam only over MX500 vents) will solve the problem?

 

[jogawag]

You can also cut round piece of medical mask and putt as first layer then full foam over and donut at the end. Are you tried that?

Not yet. But I will try after you've succeeded.

 

[furyossa]

Not yet. But I will try after you've succeeded.

That is the last and easiest trick, but we here like to solve things on the hard and risky way We like the smell of solder

 

[furyossa]

Not yet. But I will try after you've succeeded.

Small changes after 4K , but I need to correct 3K-4K

 

[jogawag]

Small changes after 4K , but I need to correct 3K-4K

You were successful, so I tried it too.
But the result was the same as yours, the sound didn't change much.

So I put donut foam on it to make it Double Foam and the bass increased as a natural consequence.