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( The review is coming from MakaiTechReviews)
- The professional DAC AK4490 chip is used to make music more realistic, the sound field more wider and the resolving power more stronger.
- Supports DSF, DFF, ISO suffix DSD audio format up to DSD128. Supports DXD, FLAC, APE, WAV, ALAC, AIFF lossless audio format up to 32Bit/384KHz.
- With Bi-directional BT4.0 technology, it can be connected to BT headset, BT speakers or car audio. Can also be connected to mobile phone and let you enjoy HD sound quality.
- For Hiby Link function, you can control X3II by mobile phone to play songs, adjust volume, search songd and more, no need to take out the player.
- Bi-directional USB Type-C interface can output the USB audio, and can connect the computer USB port as USB DAC function.
PHONE OUT PARAMETER:
- Output Power：220mW@32Ω
- Frequency Response：20Hz~20kHz（±0.5dB）
- Crosstalk：≥75dB (32Ω@1kHz)
LINE OUT PARAMETER
- Output Level：1.6Vrms
- Frequency Response：20Hz~20kHz(±0.5dB)
- Crosstalk：≥100dB (10KΩ@1kHz)
- Power Supply: DC 3.7V/2000mAh built-in li-polymer rechargeable battery
- Playback time：≥13H
- Charging Time：＜3H（fast charge） | ＜5H（slow charge）