Apos Audio
Sponsor: Apos Audio
Hi all,
Here's the long-awaited successor to the Basic DAC/Amp from xDuoo. The XD-05 Basic2 DAC/Amp adds Bluetooth 5.4, swaps out the ESS DAC chip for a Cirrus Logic chip that offers slightly better specs, adds quite a bit of power (from 500mW to 750mW @32Ω), loses a bit of battery life, but—and this is exciting—adds op-amp swapping.
Product highlights

Here's the long-awaited successor to the Basic DAC/Amp from xDuoo. The XD-05 Basic2 DAC/Amp adds Bluetooth 5.4, swaps out the ESS DAC chip for a Cirrus Logic chip that offers slightly better specs, adds quite a bit of power (from 500mW to 750mW @32Ω), loses a bit of battery life, but—and this is exciting—adds op-amp swapping.
Product highlights
- 750mW per channel output power
- Supports PCM 32bit/384kHz, DSD256, and MQA 8x
- Bluetooth 5.4 LE Audio with LC3, aptX, LDAC, and more
- 124dB SNR and THD+N as low as 0.0006%
- Runs on battery or DC power
- Replaceable op-amp chip
- High/low gain toggle
- Digital volume with 99-step precision
- Selectable bass boost (+6dB)
- Nichicon and ELNA audio-grade capacitors
- Compatible with Windows, Linux, macOS, Android, and iOS
- Battery
- 3.7V / 3000mAh
- Battery life: 11 hours (USB In), 15 hours (Bluetooth In)
- Charging time: 3 hours (fast), 5 hours (slow)
- DAC & formats
- DAC chip: CS43131
- PCM: 16–32bit / 44.1kHz–384kHz
- DSD: DSD64–256
- MQA: 8x unfolding
- Bluetooth
- LE Audio: LC3, aptX Lite, aptX_AD
- Classic: SBC, AAC, aptX, aptX_HD, aptX_Adaptive, aptX_Lossless, LDAC
- Outputs
- Other
- Gain: +0dB / +6dB
- Bass: 0dB / +6dB
- Frequency response (USB/BT): 20Hz–20kHz (±0.5dB)
- Frequency response (Amp): 10Hz–80kHz (±0.5dB)
- OLED screen: 0.91"
- Dimensions: 5.5" x 2.95" x 0.9" (13.9 x 7.5 x 2.3cm)
- Weight: 0.66lbs (0.30kg)

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