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DD ddHiFi TC35 Pro (Tetris) TypeC USB to 3.5mm Decoder Adapter (Open Box) - Discontinued

Product SKU: TC35 Pro (T) (OB)

This item is no longer available.

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Product Details

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TC35 Pro (Tetris)

A Piece of Art

The piece is made of 6063 aviation aluminum alloy which is well-carved and formed. Three little squares integrated as a whole without any splicing. The seemingly irregular shape is in fact very symmetrical, holding it in the hand feels like playing a pressure-relief toy.

A Choice to Make

The L-shape is the first choice, and it can also be other shapes, such as long strip, square, etc. The L-shaped design enables you to experience various using environments—to use with your L-shaped earphones, to connect to your laptop, or bend it to the back of your phone, etc.

All-New Powerful Decoding Chip

It adopts the ES9281AC PRO from ESS company as the decoding chip.

Sampling rates: Support up to 32bit / 768kHz
Native DSD: Support up to DSD512
SNR: -118dB

RGB Indicator Light

In addition to indicating the On and Off status*, it can also identify different sampling rates of files with different colors, including red, blue, green, yellow, white, and magenta.

*The indicator light will flash blue, green and red alternatively after being inserted to the phone, but it only works when the earphone is plugged in. The indicator light will be on steady when playing music.

red → PCM 44.1kHz/48kHz
blue → PCM 88kHz-384kHz
green → PCM 705kHz-768kHz
yellow → DOP (DSD over PCM)
white → DSD Native
magenta → MQA 


MQA official certification.

MQA enabled renderer that will complete the final unfold of an MQA file. The LED glows magenta to indicate that the unit is rendering an MQA stream or file. This delivers the final unfold of the MQA file.

Auto Detect Headphone Impedance

Before use, please insert the earphone to the TC35 Pro first and then connect it to your phone. In this way, the device will automatically detect the headphone's impedance and switch between Low Gain and High Gain modes. For instance, when high impedance is detected, it will then switch to High Gain mode to output.

A Time of Exploration
Why is it called 'Tetris'?

Tetris is a game that almost everyone has ever played. The geometry of the square, and the combination of quantity and direction, exist not only in the game, but also in our lives. During an exploration, we focused on these small squares and used such shapes to make products that are convenient for us to use.

Note: 'Tetris' here is just an image metaphor, not the name of the product.


  • DAC chip: ES9281AC PRO
  • Jack: 3.5mm (support remote control and microphone* CTIA standard)
    *The Lightning version supports in-line remote control, play / pause and next / previous track, but does not support microphone and answering phone calls
  • Frequency response: 0.032dB@20Hz-40kHz
  • Output power: ≥30mW (16Ω); ≥62mW (32Ω); ≥7mW (600Ω)
  • SNR: -118dB
  • THD+N: 0.0004%
  • Sampling rates: Supports up to 32bit/768kHz
  • Native DSD: Supports up to DSD512
  • Weight: 8.0g
  • Dimensions: 28 x 28 x 8mm

TC35 Pro (Tetris): 3.5mm female to TypeC female. It's required to use with a OTG function enabled cable, sold separately.

Note: The TC35 Pro (Tetris) does NOT come with any cables in the package! If you don't have TypeC or Lightning cable, it's suggested to buy the following according to your usage.

  • TC05: TypeC to TypeC Cable
  • MFi06: Lightning to TypeC Cable

Product Reviews

DD ddHiFi TC35 Pro (Tetris) TypeC USB to 3.5mm Decoder Adapter (Open Box) - Discontinued

Customer Reviews
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Douglas C.
United States

Small, cool looking, and not hot

Works great, sounds great, and, unlike some of the other DAC dongles, does not get hot after extended use. Recommended.


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