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URBANFUN YBF-ISS014 Impressions thread

Dec 27, 2019 at 8:39 AM Post #31 of 1,185
I owned a pair of the first batch ISS014, I just love it and recommend it to my net pals. Recently, my net pal told me that the sole seller in TaoBao ( China ), revealing the factory no longer using Beryllium to make the new batch of ISS014. They will use different metallic-coating diaphragm instead.

I am quite surprised for such changes, and how honesty they are :joy: I still haven't get a chance to try the new batch, but this seller mentioned to my net pal the new batch will be less spicy in high. This TaoBao seller already remove the "Beryllium Diaphragm" description in Chinese. I am not sure if the factory will keep the original Beryllium version for the export market ( e.g. AliExpress ). I suggested you should ask the seller before placing the order.

I love the original ISS014 so much, I really don't want to see the later buyers receiving a unpredictable version of ISS014 with different tuning :wink:

Screenshot-20191227-153152293-1.jpg
 
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Dec 27, 2019 at 9:49 AM Post #32 of 1,185
countryboyhk said:
I owned a pair of the first batch ISS014, I just love it and recommend it to my net pals. Recently, my net pal told me that the sole seller in TaoBao ( China ), revealing the factory no longer using Beryllium to make the new batch of ISS014. They will use different metallic-coating diaphragm instead.

I am quite surprised for such changes, and how honesty they are :joy: I still haven't get a chance to try the new batch, but this seller mentioned to my net pal the new batch will be less spicy in high. This TaoBao seller already remove the "Beryllium Diaphragm" description in Chinese. I am not sure if the factory will keep the original Beryllium version for the export market ( e.g. AliExpress ). I suggested you should ask the seller before placing the order.

I love the original ISS014 so much, I really don't want to see the later buyers receiving a unpredictable version of ISS014 with different tuning :wink:

Screenshot-20191227-153152293-1.jpg
Click to expand...

Wow, that is unfortunate.

My guess is that they are using a cheaper driver to offset the extra cost of fixing the mmcx sockets. It will probably be titanium coated from your description.
 
Dec 27, 2019 at 10:48 AM Post #33 of 1,185
Well, this made me order another unit straight away instead of waiting for the next Ali sale. Hopefully it'll still be from the initial batch and without MMCX issues this time.
 
Dec 27, 2019 at 10:54 AM Post #34 of 1,185
chickenmoon said:
Well, this made me order another unit straight away instead of waiting for the next Ali sale. Hopefully it'll still be from the initial batch and without MMCX issues this time.
Click to expand...

They only just said 2-3 days ago that they would fix the mmcx problem in the next batch. I don't think 3 days is enough time to fix the problem and ship new earphones to sellers.
 
Dec 27, 2019 at 11:13 AM Post #36 of 1,185
Slater said:
They only just said 2-3 days ago that they would fix the mmcx problem in the next batch. I don't think 3 days is enough time to fix the problem and ship new earphones to sellers.
Click to expand...

I don't see why these should be linked, a better MMCX connector shouldn't cost so much more that they'd have to downgrade the driver to maintain a similar price.

Anyway, I'll see what I'll get and if it's from a new batch, I'll be able to say what's different..
 
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Dec 27, 2019 at 11:29 AM Post #37 of 1,185
chickenmoon said:
Well, this made me order another unit straight away instead of waiting for the next Ali sale. Hopefully it'll still be from the initial batch and without MMCX issues this time.
Click to expand...

I guess they produced a small quantity trial order at first, and should be completely sold out.
About a week ago, I noticed they began the pre-order for the new batch ISS014 in Ali and TaoBao. My net pal pre-order one in TaoBao, and the seller inform him that his order is ready to ship yesterday.
Therefore, I am not sure they still have the old stock. Or do they even bother to update the product description in their Ali shop !?
 
Dec 27, 2019 at 12:45 PM Post #38 of 1,185
Yeesh, what a cluster, this is how brands totally lose faith of customers. It's a shame because the set I have sounds amazing. But without beryllium at this price it's just another face in the crowd...

Given their previous products I associate urbanfun with beryllium.
 
Dec 27, 2019 at 1:52 PM Post #39 of 1,185
Dec 27, 2019 at 1:56 PM Post #40 of 1,185
Slater said:
That's not a metallic coating. The only metallic coatings are aluminum, titanium, and beryllium
Click to expand...

Aluminum, that sounds interesting, any particular example? There is magnesium also, as in Periodic Audio Mg (which I wouldn't recommend buying).
 
Dec 28, 2019 at 5:37 AM Post #42 of 1,185
chickenmoon said:
Aluminum, that sounds interesting, any particular example? There is magnesium also, as in Periodic Audio Mg (which I wouldn't recommend buying).
Click to expand...

You're right; I forgot about magnesium. It is used very rarely in headphone drivers, but I don't know what the reason is (cost, performance vs other metals, etc).

Here's a chart showing how different diaphragm materials perform relative to one another (magnesium and some others are not represented):

Diaphragm Chart.jpeg

As far as an example of a driver that uses aluminum, the Sony MDR-Z1R uses a liquid crystal polymer (ie kevlar) outer diaphragm, that's been aluminum coated (via VPD). And it has a center dome made of magnesium foil.
 
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