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Does the Type-C analog signal of Airpods Max2 support 3.5 mm analog to Type-C analog?

by Poster May 29, 2025 12
This is my post 5 years ago: https://www.feng.com/post/13145208 Now that Weifeng is declining, few people have discussed it, so I sent V2 for advice. Five years later, I bought a new C-port AirPods Max2, It does support the C port to transmit analog data, but it is Type-C to the C port of macbook and iphone. I have a lot of old 3.5 mm analog sound sources, In the past, I could only use Apple's 3.5 mm built-in DAC to Lightning patch cable. So on this new headset, can I use a Type-C analog to 3.5 mm analog cable? I bought 2 of these adapters and are still on the way. I will review them when I arrive. (The seller heard that I used airpod max and took the initiative to refund it to me several stores, but they all said that they didn't support it and didn't buy it. It was hard to find a store that was willing to sell it) Guess in advance, it is estimated that there will be no response when connected, because it is an Apple device that requires Type-C to connect to Type-C. To unlock the transmission of this analog audio data, and it is charging at the same time, and it will be displayed on Apple devices Airpod max USB audio, I think it's not just as simple as Type-c analog signal, there should be a proprietary protocol that requires handshaking. Waiting for my test ~

Replies

  • Poster May 29, 2025
    Do you think it can be connected?
  • Anonymous1599 May 29, 2025
    No, you have to buy Apple's new cable, which supports 3.5 mm interface to type-c digital signal. The c port of AirPods max is digital, and direct connection with the cc cable is a digital signal
  • Anonymous1599 May 29, 2025
    https://www.apple.com.cn/shop/product/MDV84FE/A This supports type-c digital signal to 3.5 mm analog signal, and also supports 3.5 mm analog signal to type-c digital signal
  • Anonymous1600 May 29, 2025
    USB-C to 3.5 mm audio cable sells for 299 Only Apple can do
  • Anonymous1601 May 29, 2025
    https://www.apple.com.cn/shop/product/MDV84FE/A? fnode = 9b9aa05fa2c8bdbcae939a8230618f82d7735746a4c44ee9476db33df899dbb6b947fbb0189390b64d64d27317b998d71c10dd8f107761558d950f4358d18f148259577ab0d7271dd602cf42478378c175e91cd074104ab8ce8c4edabc9214c5
  • Poster May 29, 2025
    @ Anonymous1599 So that's it
  • Poster May 29, 2025
    It's so expensive... it hurts
  • Anonymous479 May 29, 2025
    I checked that the c port of airpods max uses digital signals. Use the c2c link directly, and the digital signal is transmitted in the line, which is converted by the dac in the headset. For example, when connecting to a windows computer, the device manager will have one more output device, and the name is also airpods max usb audio. If you use Apple's type-c to 3.5, the c port is connected to the headphones, and the 3.5 is connected to the output device. At this time, the dac in the cable will first convert the analog signal into a digital signal, and then pass it to the headphones through type-c, and the dac in the headphones will then convert it into an analog signal for playback, which is equivalent to turning it twice. The dac chip inside the wire is powered by the typec port output of the headset. Because the dac chip needs power supply, if the headphones are out of power, it cannot be played in this way, unlike other headphones that can be directly plugged into 3.5 and are directly driven by analog signals. This cable can also be used in reverse, computer/mobile phone type-c playback device, 3.5 mm connected to headphones/speakers, etc. In this case, the dac in the wire is equivalent to a sound card, and the type-c port supplies power to the dac chip.
  • Anonymous1602 May 29, 2025
    Ah, isn't c2c a digital signal? Then the headphones have built-in dac and then turn it to the headphones a few years ago. I used qc45 Senhai wood steamed buns like this. The disadvantage is that there is no sound after shutting down. Those with 3.5/2.5 can be directly plugged into analog cables
  • Anonymous479 May 29, 2025
    Although type-c supports the transmission of analog audio signals, airpods max does not, so this line is also a line with dac
  • Poster May 29, 2025
    @ Anonymous479 Thanks for the answer. I made a mistake at first. I thought its 7E101 firmware update supported the analog signal transmission capability of type-c. After searching, In the USB-C to USB-C lossless (C2C lossless) mode launched by the 7E101 firmware and the iOS/macOS 18.4 series, AirPods Max (USB-C) has been transformed into a pair of standard USB Audio Class 2.0 headphones: the host puts 24-bit/48 The entire kHz PCM audio is pushed to the headphones, and the headphones then go directly to their own DSP and DAC. There is no lossy encoding or redundant AD/DA throughout the link, so the official calls it "lossless". At the same time, Apple has significantly shortened the buffer on the headphone side, retaining only about 128 frames (≈ 1 ms) of USB isochronous frames. Coupled with the streamlined ANC/Spatial Audio pipeline, the end-to-end listening delay has been reduced to ≈ 6-8 ms, almost as fast as the built-in speakers of a Mac or iPhone.
  • Anonymous2543 May 30, 2025
    The line mentioned upstairs is 50 cheaper with national subsidy. I use it to connect PS5 to play games