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Sony Headphone internal codes and Bluetooth SoCs

Sony WF-1000X teardown
Sony WF-1000X BT

In a previous article I outlined many of the current and past Walkman model internal codes Sony uses.  While the Walkman models use ICX for their prefix, the headphones use HDX. I will try to keep this updated with the latest information but it is not always possible to find the code, the Bluetooth chip or both.

Sony WH-CH510
Sony WH-CH510
Most of the information is from the FCC documents, some from the Bluetooth certifications, and some from teardowns. Not all of the data will be complete because the images on the FCC are of poor quality or the code is not always shown in the pictures from the FCC or teardown.

Here are the links to the Bluetooth SoCs Sony has used for the past few years in their headphones.

Qualcomm CSR8675

Qualcomm CSR8670

Airoha AB1522

Realtek RTL8763B

Mediatek MT2811

Mediatek MT2822

Airoha AB1562M

Model Code Bluetooth SoC
Gaming headset YY2961 ??
WH-G700 YY2960 ??
WH-G900N YY2959 MT2811?
?? YY2958 ??
WI-C100 HDX-2957 Airoha AB1562M?
?? YY2956 ??
?? YY2955 ??
WH-1000XM5 YY2954 ??
WF-L900 HDX-2953 MT2822M
WF-C500 HDX-2952 Airoha AB1562M
WH-XB910N HDX-2951 MT2822
(WF NC model) YY2950 ??
?? YY2949 ??
WF-1000XM4 HDX-2948 MT2822S
WH-CH710N HDX-2947 Airoha AB1531
WI-SP510 ?? RTL8763B
WF-SP800N ?? MT2811SP
WF-XB700 HDX-2944 airoha AB1552
WH-1000XM4 HDX-2943 MT2811A
WF-H800 ?? MT2811A
WH-H810 HDX-2941 MT2811
WH-H910N HDX-2940 MT2811SP
WI-XB400 HDX-2937 RTL8763B
WH-CH510 HDX-2936 RTL8763B
WI-C310 HDX-2934 RTL8763B
WI-C200 HDX-2933 RTL8763B
WF-1000XM3 HDX-2931 MT2811
WH-XB700 HDX-2930 CSR8675
WI-1000XM2 HDX-2928 MT2811SP
WH-XB900N ?? CSR8675
WH-CH500 HDX-2918 Airoha AB1522
WH-1000XM3 HDX-2916 CSR8675
WI-C300 HDX-2914 Airoha AB1522
WF-SP700N HDX-2911 CSR8675
WH-CH400 HDX-2910 Airoha AB1522
WH-CH700N HDX-2908 CSR8675
WH-H900N HDX-2893 CSR8675
WH-1000XM2 HDX-2892 CSR8675
WI-C400 HDX-2888 Airoha AB1522
WH-H800 HDX-2887 CSR8675
WF-1000X HDX-2865 CSR8675
WI-SP600N ?? CSR8675
MDR-XB950N1 HDX-2854 CSR8675
WI-1000X HDX-2853 CSR8675
MDR-ZX220BT HDX-2852 CSR8675
MDR-XB70BT HDX-2842 CSR8675
MDR-XB50BS HDX-2840 CSR8675
MDR-XB80BS HDX-2838 CSR8675
MDR-1000X HDX-2837 CSR8675
MDR-XB650BT HDX-2834 CSR8670
MDR-100ABN HDX-2833 CSR8670
MDR-EX750BT HDX-2821 CSR8675
MDR-1ABT HDX-2819 CSR8670
MDR-ZX330BT HDX-2795 CSR8670
MDR-ZX770BN HDX-2793 CSR8670
MDR-ZX550BN HDX-2783 CSR8670
MDR-ZX780DC HDX-2863 unknown
MDR-XB950BT HDX-2755 CSR8670
?? HDX-2734 unknown
MDR-10RBT HDX-2587 unknown
MDR-RF6500 HDX-2516  unknown
MDR‐AS600BT ?? CSR8670
MDR-AS800BT ?? CSR8670
MDR-1RBT ?? CSR8670
DR-BTN200 ?? CSR8670
There is no link to the MT2811 since there is no information at the moment. Not sure if Mediatek is just keeping it unpublished for now or will not publish it at all. From the Bluetooth certification, this might just be an Airoha Bluetooth chip re-badged as a Mediatek one, but that is only a theory. I will have a post up about the chip shortly. I have updated the links above.

Update (March 2021 update): Updated the list with all the current and upcoming devices. Any entries with * beside them are not 100% confirmed/certain.There are many unknowns, the WI-1000X might be the HDX-2865, but it could also be the WI-SP600N. There is a chance the WF-H800 could be HDX-2942, with the WF-SP800N and WI-SP510 being either the HDX-2945 and HDX-2946 respectively, or vice versa.

The greyed out lines are possible models but have not appeared on any certification site. There is no guarantee they will appear though. Like wise, I have replaced the YY codes with HDX, since as seen in the WF-C500 teardown, Sony still uses the HDX naming scheme in house for development but opts for YYxxxx when certifying products to hide their identity. 

Update (March 2022): Some new additions like the WH-1000XM5, gaming headsets, some SoC details. Some unknown models (if they exist), YY2949, YY2955, YY2956, YY2958. Perhaps these will be some future models or might no even exist.
If anyone is able to fill in any missing information, please leave a comment below. thanks.


  1. Hi! Great post!
    Is there any chance you know which buttons are used on the HDX-2936 board? I drowned two of them and would like to replace them.

    1. Do you mean what kind of buttons? I do not know the model of buttons, but I can post a photo of the board below from a teardown.


      is this what you were looking for?

  2. How to disable "Sidetone Function" in Sony's Bluetooth earphones? WH CH-510

  3. I really want to know that too!!!

  4. WH-CH520 HDX-2958 Airoha AB1561M


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