D&A ALPHA PRO DAC Headphone Amplifier

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The D&A Alpha Pro is a DAC headphone amplifier with excellent performance. It is based on audiophile components such as an ES9039MSPRO DAC chip, XMOS XU-316 USB interface, NJU72315 volume control and 4C-FBDA balanced discrete headphone amplification. Together, these components offer support for high-resolution streams up to PCM 32bit 768kHz, DSD512 and MQA, while providing 2x6000mW under 32 ohm headphone amplification.

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Reference : 20957
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789,00 €tax incl.

657,50 € tax excl.
Including 0,05 € for green tax

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Facturation France
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2 Years warranty

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D&A Alpha Pro DAC Headphone Amplifier ES9039MSPRO XMOS XU-316 Bluetooth LDAC 32bit 768kHz DSD512

Photo of D&A Alpha Pro

The D&A Alpha Pro is a DAC headphone amplifier with excellent performance. It is based on audiophile components such as an ES9039MSPRO DAC chip, XMOS XU-316 USB interface, NJU72315 volume control and 4C-FBDA balanced discrete headphone amplification. Together, these components offer support for high-resolution streams up to PCM 32bit 768kHz, DSD512 and MQA, while providing 2x6000mW under 32 ohm headphone amplification. The DAC's balanced line output also boasts exceptional performance, with a dynamic range of 133dB and a THD+N of -124dB (0.00006%). On top of this comes support for Bluetooth aptX HD and LDAC, thanks to a QCC5125 chip. And that's not all: the architecture of this technological jewel, the D&A Alpha Pro, also features a high-performance clock circuit with no less than 3 femtosecond oscillators and 2 PLL clocks, plus two independent regulated linear power supplies. Finally, D&A has enhanced the appearance of its device with a beautiful transparent plate and numerous luminous elements on the front panel, giving it a pleasant retro-futuristic look. The many inputs and outputs available will make it the centerpiece of your Hi-Fi installation.

D&A Alpha Pro highlights

D&A Alpha Pro: An ES9039MSPRO DAC for outstanding precision

The D&A Alpha Pro benefits from an ES9039MSPRO chip with MQA decoder, coupled with a latest-generation XMOS XU-316 interface to support sampling rates up to PCM 32bit 768kHz. In addition, its overall structure greatly reduces noise level and output impedance to achieve a dynamic range of 133dB and a THD+N of -124dB on its balanced XLR output.

DAC chip ES9039MSPRO

D&A Alpha Pro: Discreet 4-channel balanced headphone amplification

The D&A Alpha Pro's headphone amplification circuit integrates 32 discrete transistors within its 4 channels. This gives it an output impedance of < 0.1% and a THD of just 0.0001%, for extremely clean, clear sound at its headphone outputs. Moreover, it enables it to drive all types of headphones and IEMs from 16 ohms to 600 ohms impedance effortlessly. In fact, the Alpha Pro is capable of delivering up to 2x6000mW of power under 32 ohm load on its balanced XLR and 4.4mm jack headphone outputs, and up to 2x 3000mW @ 32 ohm on its 6.35mm jack headphone output. This is complemented by an NJU72315 analog volume control chip for precise rendering at both high and low volumes, for a pleasant listening experience in all circumstances.

The D&A Alpha Pro amplifier circuit

D&A Alpha Pro: Bluetooth aptX HD and LDAC

The Alpha Pro, thanks to a QCC5125 Bluetooth chip, supports the high-resolution Bluetooth codecs SBC, AAC, aptX, aptX-HD and LDAC (24bit 96kHz). This provides a reliable, stable wireless connection and fast listening to your favorite streaming platforms via your phone, for example.

Bluetooth function on the D&A Alpha Pro

D&A Alpha Pro: 3 output modes

The Alpha Pro is a versatile device offering various output modes. These include DAC mode for bit-perfect PCM, DSD, MQA and LDAC decoding, preamp mode for balanced signals with different gain stages, and headphone amplifier mode with dedicated analog input and 3 headphone outputs.

D&A Alpha Pro output modes

D&A Alpha Pro: An optimized clock circuit

The clock circuit of the D&A Alpha Pro is based on a dual PLL (Phase-Locked Loop) architecture combined with three high-precision femtosecond oscillators. A first PLL dedicated to the USB input ensures stable synchronization thanks to these ultra-low jitter oscillators, guaranteeing an extremely clean clock signal for digital streams. A second PLL, driven by a VCXO (Voltage-Controlled Crystal Oscillator) oscillator, supports coaxial and optical inputs, maintaining perfect stability whatever the source. This design reduces jitter to around 15ps, a remarkable level for a DAC in this class. The result: smoother digital-to-analog conversion, more accurate sound and a more realistic soundstage. The entire clock circuit is optimized to guarantee faithful audio reproduction, free from time distortion and digital artifacts.

The D&A Alpha Pro clock circuit

D&A Alpha Pro: Dual discrete regulated linear power supplies

The D&A Alpha Pro uses a dual filtered Mean Well power supply, followed by a separate discrete regulation stage for each rail (positive and negative) of the DAC and headphone amp circuits. It's worth mentioning that the regulation stage uses only transistors and discrete analog components. This architecture offers enormous stability, galvanic isolation of the conversion and amplification stages, reduced crosstalk and improved audio performance.

D&A Alpha Pro power supply

D&A Alpha Pro: A retro-futuristic design

D&A has given its Alpha Pro a retro-futuristic look, thanks to an aesthetic that's at once modern, minimalist and vintage. Indeed, the Alpha Pro's components create a perfect harmony between innovation and nostalgia. This is thanks to a transparent plate and intelligent LEDs on the front of the device. As well as being decorative, the LEDs provide a visual indication of the device's operating status for clear, rapid feedback.

D&A Alpha Pro design

Overview of D&A Alpha Pro

Overview of the D&A Alpha Pro
1Balanced XLR 4-pin headphone output
2Single-ended 6.35mm jack headphone output
3Balanced 4.4mm jack headphone output
4LED on/off button
5Gain control / Indicator
6Output selection / Indicator
7Input mode selection / Indicator
8Volume control / LED indicator wheel
9Balanced XLR output
10Single-ended RCA output
11Line input
12Coaxial input
13Toslink optical input
14Bluetooth antenna
15USB-C input
16AC power input / Power switch

D&A Alpha Pro test by Audio Science Review (Amir)

"Nice to see a new brand come to market with some differentiation while providing state of the art performance in some departments such as the DAC and power output. [...] I am going to recommend the D&A Alpha Pro."
ASR logo

Technical characteristics

Specifications
Product typeDAC
Headphone amplifier
DAC chipESS ES9039MSPRO
Bluetooth chipQCC5125
Inputs1x USB-C
1x Coaxial
1x Toslink optical
1x RCA line input

Bluetooth
Outputs1x Balanced XLR output
1x Single-ended RCA output

1x 6.35mm jack single-ended headphone output
1x 4.4mm jack balanced headphone output
1x XLR balanced headphone output
Supported sample ratesUSB input: PCM up to 32bit 768kHz, DSD up to DSD512, MQA
Coaxial and Toslink input: PCM up to 24bit 192kHz, DSD DoP64, MQA / MQA-CD
Supported Bluetooth CodecsAAC 16bit/44.1kHz 320kpbs
SBC 16bit/44.1kHz 328kpbs
aptX 16bit/44.1kHz 352kpbs
aptX-HD 16bit/48kHz 576kpbs
LDAC 24bit/96kHz (990kbps/660kpbs/330kpbs)
Line output levelsXLR: 5.2Vrms
RCA: 2.5Vrms
Headphone output powerBalanced headphone outputs (XLR/4.4mm jack):

2x 4000mW @ 16 ohm
2x 6000mW @ 32 ohm
2x 1400mW @ 150 ohm
2x 700mW @ 300 ohm
2x 350mW @ 600 ohm
6.35mm jack single-ended headphone output:

2x 2000mW @ 16 ohm
2x 3000mW @ 32 ohm
2x 700mW @ 150 ohm
2x 350mW @ 300 ohm
2x 175mW @ 600 ohm
THD+NXLR: 0.00006% (-124dB) (UN-WTD)
RCA: 0.00007% (-122dB) (UN-WTD)
Headphone outputs: 0.0001% (-115dB) (UN-WTD)
Dynamic rangeXLR: 133dB
RCA: 128dB
Headphone outputs: 125dB
SNRXLR: 133dB
RCA: 128dB
Headphone output: 125dB
Output impedance100 ohm
Headphone outputs : Near 0 ohm
Headphone amplifier gain (High)XLR/Jack 4.4mm : +15.8dB
Jack 6.35mm : 9.8dB
USB transmissionUSB 2.0 (Asynchronous)
USB compatibilityWindows 7 / 8 / 8.1 / 10 / 11 (with driver)
MAC OSX, IOS, Linux, Android (without driver)
General
Power supply100-240V AC
Energy consumption< 50W
Standby: < 0.5W
Dimensions225 x 55x 199.3mm (WxHxD)
Weight1.76kg
Package1x D&A Alpha Pro
1x USB-A to USB-C cable
1x Mains power cable
 
Data sheet
InputBluetooth
InputRCA
InputOptical
InputUSB
InputSPDIF
OutputXLR
OutputJack 4.4mm
OutputRCA
OutputJack 6.35mm
DAC / ADC ChipES9039MPro / ES9039MSPro
Max sampling rate768kHz
Max sampling rateDSD512
Max sampling rateMQA
ColorSilver
ClassClass A / AB
NetworkingNo
Remote ControlNo
 
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D&A ALPHA PRO DAC Headphone Amplifier ES9039MSPRO XMOS XU-316 Bluetooth LDAC 32bit 768kHz DSD512
The D&A Alpha Pro is a DAC headphone amplifier with excellent performance. It is based on audiophile components such as an ES9039MSPRO DAC...

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