[furyossa]

Yikes those ship prices are insane. They are just saying don’t buy it basically... that’s got to be frustrating. I did do some fancy curved tube design with a bike handle grip but just didn’t work out as well as I had hoped. Honestly I am more than happy with my little rig as is. It’s made from a kids medicine syringe tube. For me it gives me good idea for what my drivers are doing but again why I don’t post them publicly, just personal reference. If I was going to go all out I would get the standardized coupler and ear simulation. Like this
US $55.20 8％ Off | Headphone Curve Tester Artificial Ear Artificial Ear IEC711 Frequency Response Curve Waterfall Chart Base Version
https://a.aliexpress.com/_m01uPTf

but at like $250 all in I am good. Even $40 I’d rather get another M2 Pro and just live with My little $15 measuring rig.

I am very use to 2.1 studio monitors and as such I think the M2 Pro shells are a good fit. I asked Smabat if they were going to offer just the shells again but not heard anything yet. The M2 Pro is $45 right now and seems like a good bet to go ahead and get another set so I can experiment some more. They are just so comfy. M1 Pro sounds great but due to it being a smaller driver just doesn’t have the same impact and spatial sensations as a larger driver.

I know one of my 400ohm drivers has a nasty notched dip around 1khz. It’s just one of them. So maybe I should just buy another set and see if it’s just my drivers I don’t like.

Yup I know about that coupler on Ali, I've been watching it for a long time It has always cost around 100 and now is +$113 for shipping.
Joke aside, it's expensive, and I agree that something else can be bought for that money.
The setup that I have is good for measuring changes in frequency responses when you test driver in different shells or when you try to play with tuning.

What is interesting about making this DIY coupler is that you can also test certain materials and see how they affect frequency response.
For example, I replaced the inner EVA foam tube with this different type of EVA foam which have a layer on one side similar to peach peel with fine hairs.
This type of surface can smooth a bit of treble peaks after 8K

I think that similar material is used as "wallpaper" for inner walls of Moondrop Chaconne shell.

 

[furyossa]

Ok so I noticed there isn’t any info on the 500ohm beryllium so I bit the bullet and got it. Am going to just hope Smabat starts selling the M2 shells again at some point.

US $29.64 20％ Off | GHXAMP MX500-S500 Earphone Speaker Unit 500 Ohm Beryllium Membrane Full Range Earpiece Driver 102.33dB Repair Earphone Parts 2pc
https://a.aliexpress.com/_mMig8Yd

They make mistake. That's graphene 500ohm driver
https://www.aliexpress.com/af/500ohm-graphene.html

 

[headenvelopedinsound]

They make mistake. That's graphene 500ohm driver
https://www.aliexpress.com/af/500ohm-graphene.html

I will look into that driver then. I canceled the order.

I have a bunch of that felt type stuff. I used it on my N650 and M10160 during various states of modding. Was thinking of putting it on the inside of the big gold set of “bells” I have. They are huge.

 

[furyossa]

I will look into that driver then. I canceled the order.

I think that @Themilkman46290 has 500ohm driver.

 

[Themilkman46290]

Ok so I noticed there isn’t any info on the 500ohm beryllium so I bit the bullet and got it. Am going to just hope Smabat starts selling the M2 shells again at some point.

US $29.64 20％ Off | GHXAMP MX500-S500 Earphone Speaker Unit 500 Ohm Beryllium Membrane Full Range Earpiece Driver 102.33dB Repair Earphone Parts 2pc
https://a.aliexpress.com/_mMig8Yd

Great driver, bit more sub bass and better highs then the 600ohm, all in all better

 

[furyossa]

Great driver, bit more sub bass and better highs then the 600ohm, all in all better

That's exactly how it sound 10mm graphene. To me the big surprise are the really cheap models of QKZ VK4 and AK1. Great move by QKZ, the little graphene driver they used for these models is not bad at all.

 

[Themilkman46290]

I was wanting to try the 19-21, I am looking at 2 versions with big solder points, one has black glue and cost a little more, the other has white glue and is a wee bit cheaper, which ones do you guys recommend? They both say 98.5db

 

[furyossa]

I was wanting to try the 19-21, I am looking at 2 versions with big solder points, one has black glue and cost a little more, the other has white glue and is a wee bit cheaper, which ones do you guys recommend? They both say 98.5db

For me one of the most important parameters is sensitivity of the driver and impedance. In this case F.R.:19-21kHz does not play a big role.
It would be nice if some parameters were standardized, especially if used with DAC/Amp, say for
- 16-32ohm (I will also add 64ohm) sensitivity: < 100dB (96dB-98dB)
- 150-300ohm sensitivity: (100dB-105dB)
- 400ohm sensitivity: (105dB-110dB)
- 500-600ohm sensitivity: (110dB-120dB)

 

[Themilkman46290]

For me one of the most important parameters is sensitivity of the driver and impedance. In this case F.R.:19-21kHz does not play a big role.
It would be nice if some parameters were standardized, especially if used with DAC/Amp, say for
- 16-32ohm (I will also add 64ohm) sensitivity: < 100dB (96dB-98dB)
- 150-300ohm sensitivity: (100dB-105dB)
- 400ohm sensitivity: (105dB-110dB)
- 500-600ohm sensitivity: (110dB-120dB)

I am just curious what the difference is, they are the big solder points, 19-21 drivers, but they are about 3 dollars difference for the 10 pack, the one for 21 dollars has black glue, and the one for 18 dollars has white glue
Wondering what the sonic difference is...

 

[robar]

I am just curious what the difference is, they are the big solder points, 19-21 drivers, but they are about 3 dollars difference for the 10 pack, the one for 21 dollars has black glue, and the one for 18 dollars has white glue
Wondering what the sonic difference is...

Can you send link to what two version are you thinking about?
I only tried this variant so I can only recommend this from experience:
https://www.aliexpress.com/item/4000281063945.html
there is a 5-pack at NSC for less than 15usd, but I think you have to ask them if this is the same as above
https://www.aliexpress.com/item/4001133273395.html

 

[Themilkman46290]

Can you send link to what two version are you thinking about?
I only tried this variant so I can only recommend this from experience:
https://www.aliexpress.com/item/4000281063945.html
there is a 5-pack at NSC for less than 15usd, but I think you have to ask them if this is the same as above
https://www.aliexpress.com/item/4001133273395.html

You pretty much answered my question
These are the drivers, in the yuming store

 

[furyossa]

I was just looking at the 130ohm driver yesterday but they are $33 right now which is the same as the 600ohm... You know a better place to get that driver for the old cheaper price?

I don't know but "search" on Ali probably miss NSC store. Here is the price as before $16 https://www.aliexpress.com/item/33047315914.html
JieTu store sale it for $15.6 https://www.aliexpress.com/item/4000051991677.html

 

[furyossa]

A multi-winding voice coil is usually used in the case of a higher impedance, but here it is achieved by using a resistor
This is funny. Take a look first driver on this video

And the mystery has been revealed

I guess similar resistors were used for this mod
https://www.aliexpress.com/item/32636020144.html
It can be found in local electronics store
This one offers a large selection of different impedance https://www.aliexpress.com/item/33046380980.html
Do we need to look at any other specific parameter that is important when we chose these resistors for earbuds mod?

 

[headenvelopedinsound]

Great driver, bit more sub bass and better highs then the 600ohm, all in all better

You had me at great driver... lol. I’ll give it a go. Ordered another M2 Pro...

My wife came in today and said “every time I come in here you have another one of these little speaker parts on your desk and a soldering iron out. What in the world could you possibly do to them you haven’t already!?”

of course she is smiling as she says it and I just was like “well yeah I have plans, lots of plans, and there are plenty of things to still discover” She is good to me. If it’s not earbuds it’s putting new pickups in my guitars or parts in a computer.

 

[furyossa]

You had me at great driver... lol. I’ll give it a go. Ordered another M2 Pro...

My wife came in today and said “every time I come in here you have another one of these little speaker parts on your desk and a soldering iron out. What in the world could you possibly do to them you haven’t already!?”

of course she is smiling as she says it and I just was like “well yeah I have plans, lots of plans, and there are plenty of things to still discover” She is good to me. If it’s not earbuds it’s putting new pickups in my guitars or parts in a computer.

She's probably expecting you to build one pair for her. Ask for advice @Themilkman46290. He is the master for "the gift" builds. This is one of the beautiful pair that I saw.
Also be careful when you pick color for the cable, it should definitely be her favorite color.
Last year I build "Snow Flake" model as NY gift, from white K's 300ohm shells, white braided cables, white driver covers and white foams. I had to wash my hands every time before I take them I forgot to take pictures of them, I was in a bit of a hurry to finish the gift on time