D&A Alpha Pro Hi-Res DAC Headphone Amp Decoder

Product Parameters:
Inputs: USB / Optical / Coaxial / Bluetooth / RCA
Outputs: XLR/RCA/XLR headphones/4.4mm headphones/6.35mm headphones
Line output voltage:
XLR------5.2Vrms
RCA------2.5Vrms
Headphone output level:
4000mW x2(16Ω)
6000mW x 2(32Ω)
1400mW x 2(150Ω)
700mW x2(300Ω)
350mW x2(600Ω)
THD+N：
XLR----------0.00006%(-124dB)(UN-WTD)
RCA---------0.00007%(-122dB)(UN-WTD)
HP-----------0.0001%(-115dB)(UN-WTD)
Dynamic range/ SNR:
XLR--------133dB
RCA-------128dB
HP---------125dB
Output Impedance:
LINE OUT----------100Ω
HP OUT------------Near 0Ω
Headphone Amplifier High Gain：
Balanced +15.8dB
Unbalanced +9.8dB
USB transmission: USB2.0(Asynchronous)
USB compatibility: Windows 7 / 8 / 8.1 / 10 / 11(Needs Driver),
Mac OSX, i0S, Linux, ANDROID
MQA decoder: USB / Optical / Coaxial
MQA-CD decoder: Optical / Coaxial
Max supported sampling rate:
USB decoding------------------Up to 768kHz/32bit; DSD512 (Native)
Coaxial input decoding--------Up to192kHz/24bit; DoP64
Optical input decoding--------Up to192kHz/24bit; DoP64
Bluetooth specification: 5.1(Support SBC, AAC, aptX, aptX HD, LDAC)
Power Consumption: <50W
Standby power: <0.5W
Size: 225 x 55 x 199.3mm (WxHxD)
Weight: 1.76kg /3.88lb

• 【ES9039MSPRO Flagship DAC Chip】 Harnessing ESS's flagship ES9039MSPRO DAC with MQA hardware decoding, HyperStream technology, and fully isolated digital/analog processing, the Alpha Pro eliminates jitter via 32-bit noise shaping and proprietary "Zero-Jitter Clock" architecture. Our "SIGMA DAC" topology employs 8-channel differential signal summation per channel, reducing output impedance by 4x and noise by 75%, achieving unmatched dynamic range (133dB) and THD+N(-124dB).
• 【4C-FBDA Fully Balanced Discrete Amplification】 Featuring 32 discrete transistors across four channels, the 4C-FBDA circuit achieves <0.1Ω output impedance and 0.0001% THD. Effortlessly driving 16Ω-600Ω headphones, it delivers 6000mW+6000mW at 32Ω with zero dynamic compression.
• 【Pure Preamplifier Function】 Equipped with NJU72315 analog volume control-the industry's highest-performance chip-Alpha Pro eliminates micro-detail loss at low volumes while attenuating external noise.
• 【Analog Input】 A groundbreaking analog input circuit supports turntables and tape decks, serving as a standalone preamplifier for 90%+ legacy audio systems. *Note: Requires phono preamp-enabled turntables.
• 【Dual-Domain Isolation Architecture】 Digital and analog modules are physically segregated via 4-layer PCB isolation and independent ground planes. Shielded blocks and star-quad power routing ensure zero crosstalk between DSP processing and DAC conversion.
• 【Built for perfect reproduction】 Three femtosecond-grade oscillators-two for local USB clocks and one VCXO for the 2nd PLL-slash jitter to 15ps (10x lower than conventional designs), ensuring sharper imaging, better detail, and a more natural sound across every input.

Introducing the Alpha Pro—a premium DAC and headphone amplifier engineered for audiophiles who demand pristine sound quality. **What You Get** The ES9039MSPRO flagship DAC chip with MQA hardware decoding delivers exceptional clarity and detail. Its advanced "SIGMA DAC" topology achieves industry-leading dynamic range (133dB) and ultra-low distortion (THD+N at -124dB), eliminating jitter through proprietary zero-jitter clock architecture. The fully balanced discrete amplifier features 32 transistors across four channels, driving headphones from 16Ω to 600Ω with up to 6000mW per channel at 32Ω—no dynamic compression. **Connectivity & Flexibility** Connect via USB, optical, coaxial, Bluetooth 5.1, or RCA. Supports sampling rates up to 768kHz/32-bit and DSD512 via USB. Works as a standalone preamplifier for turntables and legacy audio systems. **Built for Precision** Dual-domain isolation architecture separates digital and analog circuits completely. Three femtosecond-grade oscillators reduce jitter to just 15ps, ensuring sharper imaging and more natural sound reproduction across all inputs. Compact, efficient, and compatible with Windows, Mac, iOS, Linux, and Android.