[LostnAmerica]

sorry to correct you @espe0

Xperia Phones are Bundled with the MH750 , TYPE: AG-0501 (Black) , not MH755 (Shorter cable without microphone)
its practically impossible now to get the older off-center air vent MH755 TYPE: AG-0503 version made in 2013 anymore MFG dates 13WKXX - 2013 Week XX.

MH755, TYPE: AG-0500/0501/0502/0506 , Mfg 2015-2019 (Center air vent) , can still be purchased from limited sellers , of course may also be bought together with the Sony Bluetooth Receiver and recently also spotted the 2019 standalone MH750 Sony retail package

There are also reports of the newer MH755 retail packed with Bluetooth with a Straight 3.5 mm jack instead of a L-Jack and discontinued usage of the CE tagging with Product details on the cable for MFG 2017-2019

I own 3 different Types and spent 1 week doing A/B/C testing: :

1. MH755 AG-503 - MFG 2013 13WK27 - 2013 Week 27
2. MH750 AG-501 - MFG 2017 17WK42 - 2017 Week 42
3. MH750 AG-500 - MFG 2015 15WK52 - 2015 Week 52

Heard that Sony has another variant mfg in 2019/20 , but since I don't own it or able to buy it ..Im sorry I will not be able to comment on that.

Below an image of the MH750 bundled with the Sony Xperia XZ2 Phone , notice it no longer has any CE markings or label on the cable

Awesome information with incredible details, nicely done. And very informative, thanks for that! So, how’s the A/B testing going? Hope you share that, curious to hear others take in the sound.
Cheers

 

[brianforever]

Awesome information with incredible details, nicely done. And very informative, thanks for that! So, how’s the A/B testing going? Hope you share that, curious to hear others take in the sound.
Cheers

Thanks @LostnAmerica for thee kind words..but the MH750/755 variants having such a long history has also been investigated by other hardworking mates. I'm deeply appreciative to their advise and humbly give thanks to them too..and many others not named with apologies, those who I would greatly mentioned are @crinacle @Slater @TheVortex @axhng @eqsOne @Nuclear Reactor @ClieOS @mochill @aspire5550 and finally @Sead (Member of the Trade: Sony Mobile)

Just again to highlight.. Sony's OEM ( They designed, engineered and make the prototypes but contract out to others for mass mfg) has 2 iterations of their drivers (pop it open yourself, only takes less than 2 mins with a thick pin ) from 2012-2013/4 (13WK-XX) -Off centered oval vent & their newer 2015/6/7/8/9 (15WK XX onwards) with centered round vent and they do share almost identical sound signatures except the newer versions has a slightly elevated Mid/Sub Bass,

Which was also agreed and mentioned by @TheVortex & @aspire5550 https://www.head-fi.org/threads/chinese-asian-brand-iem-info-thread.820747/post-14705306, as I believe Sony had to work with that, due to different factory contracts and cost reductions thru the years, but are very strict on their prefered sound signatures to be as close to their prototype as possible..

 

[Zerohour88]

Thanks @LostnAmerica for thee kind words..but the MH750/755 variants having such a long history has also been investigated by other hardworking mates. I'm deeply appreciative to their advise and humbly give thanks to them too..and many others not named with apologies, those who I would greatly mentioned are @crinacle @Slater @TheVortex @axhng @eqsOne @Nuclear Reactor @ClieOS @mochill and finally @Sead (Member of the Trade: Sony Mobile)

Just again to highlight.. Sony's OEM ( They designed, engineered and make the prototypes but contract out to others for mass mfg) has 2 iterations of their drivers (pop it open yourself, only takes less than 2 mins with a thick pin ) from 2012-2013/4 (13WK-XX) -Off centered oval vent & their newer 2015/6/7/8/9 (15WK XX onwards) with centered round vent and they do share almost identical sound signatures except the newer versions has a slightly elevated Mid/Sub Bass,

Which was also agreed and mentioned by @TheVortex, as I believe Sony had to work with that, due to different factory contracts and cost reductions thru the years, but are very strict on their prefered sound signatures to be as close to their prototype as possible..

ah, good to know about the vent on the driver, I've always gotten the off-centered oval vent instead of the centered round ones.

 

[brianforever]

ah, good to know about the vent on the driver, I've always gotten the off-centered oval vent instead of the centered round ones.

@Zerohour88 Glad to hear that..its rare, would you mind sharing the MFG Dates and the TYPE: AG-50X ? it would be helpful in collating a record of whats available now..as there are the undocumented MFG 14WK-XX & the even earlier 12WK-XX 2012 -First Batch

 

[Zerohour88]

@Zerohour88 Glad to hear that..its rare, would you mind sharing the MFG Dates and the TYPE: AG-50X ? it would be helpful in collating a record of whats available now..as there are the undocumented MFG 14WK-XX & the even earlier 12WK-XX 2012 -First Batch

From what I can skim through my pics, its 1327, 1326, 1334, 1336. Seems to correspond with your info too. Also just realized I never gotten any other model year despite purchasing from 3 different sellers.

 

[brianforever]

From what I can skim through my pics, its 1327, 1326, 1334, 1336. Seems to correspond with your info too. Also just realized I never gotten any other model year despite purchasing from 3 different sellers.

Thanks @Zerohour88 Strange that all the standalones TYPE: AG-0503 (off-center vent) were batches from year 2013 , when its circa 2012 onwards, perhaps it seems the batches 2012/2014 were strictly bundled sales only with extremely low quantities, as I have yet to see one in the wild myself.

Hopefully more users can come forward with their unit's information so we can dispel notions with real data

 

[irv003]

found something interesting while cleaning my workplace, compared them as pictured

 

[brianforever]

found something interesting while cleaning my workplace, compared them as pictured

Thanks @irv003 for sharing those images, seems both are authentic..just different manufacturing periods...Left is TYPE: AG-0500/0501 (2015/17/19) , Right is TYPE: AG-0503 (2012/13/14), I have both variants myself

 

[irv003]

Thanks @irv003 for sharing those images, seems both are authentic..just different manufacturing periods...Left is TYPE: AG-0500/0501 (2015/17/19) , Right is TYPE: AG-0503 (2012/13/14), I have both variants myself

where can we found that MFG dates?

 

[brianforever]

where can we found that MFG dates?

attached Image shows :

13W36 - MFG 2013 Week 36 - TYPE: AG-0503

And newer batches without CE tagging/labels attached to the cables but are stated on the packaging stickers

17W43 - MFG 2017 Week 43 - TYPE: AG-0500 / AG-501

 

[irv003]

MH750 looks neat and clean

 

[irv003]

these are the ones pictured

 

[brianforever]

these are the ones pictured

Thanks Mate @irv003 Awesome Info, and exactly what was expected..

 

[irv003]

who else got this inner node on their shell?
this is from my sony mh750.
my mh755 kanoya ebay doesnt have this

 

[assassin10000]

who else got this inner node on their shell?
this is from my sony mh750.
my mh755 kanoya ebay doesnt have this

I got what I think is a fake 3.5mm
straight cable mh755 with that style shell. Although it doesn't sound bad, it isn't quite the same as the other mh755's I've had.



The bag had no sticker/label.



Has a similar nozzle filter as your mh750, black foam in nozzle.





Next to a legit mh755.

found something interesting while cleaning my workplace, compared them as pictured

Also the above possible 'fake' mh755 has the same stem as your mh750. Mfg date on tag shows 13w09. So...


Edit: verified legit, just different batch/build.
https://www.head-fi.org/threads/son...750-mh755-mh1c-ex300-etc.900005/post-15607660