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D&A ALPHA PRO DAC Headphone Amplifier
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Accessories for this product
Find here a selection of useful and/or essential accessories for this product. These are specially selected by the Audiophonics team according to the characteristics of the product.
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 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: 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.
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.
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.
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: 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.
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: 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.
Overview of D&A Alpha Pro
| 1 | Balanced XLR 4-pin headphone output |
| 2 | Single-ended 6.35mm jack headphone output |
| 3 | Balanced 4.4mm jack headphone output |
| 4 | LED on/off button |
| 5 | Gain control / Indicator |
| 6 | Output selection / Indicator |
| 7 | Input mode selection / Indicator |
| 8 | Volume control / LED indicator wheel |
| 9 | Balanced XLR output |
| 10 | Single-ended RCA output |
| 11 | Line input |
| 12 | Coaxial input |
| 13 | Toslink optical input |
| 14 | Bluetooth antenna |
| 15 | USB-C input |
| 16 | AC 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."
Technical characteristics
| Specifications | |
|---|---|
| Product type | DAC Headphone amplifier |
| DAC chip | ESS ES9039MSPRO |
| Bluetooth chip | QCC5125 |
| Inputs | 1x USB-C 1x Coaxial 1x Toslink optical 1x RCA line input Bluetooth |
| Outputs | 1x 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 rates | USB 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 Codecs | AAC 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 levels | XLR: 5.2Vrms RCA: 2.5Vrms |
| Headphone output power | Balanced 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+N | XLR: 0.00006% (-124dB) (UN-WTD) RCA: 0.00007% (-122dB) (UN-WTD) Headphone outputs: 0.0001% (-115dB) (UN-WTD) |
| Dynamic range | XLR: 133dB RCA: 128dB Headphone outputs: 125dB |
| SNR | XLR: 133dB RCA: 128dB Headphone output: 125dB |
| Output impedance | 100 ohm Headphone outputs : Near 0 ohm |
| Headphone amplifier gain (High) | XLR/Jack 4.4mm : +15.8dB Jack 6.35mm : 9.8dB |
| USB transmission | USB 2.0 (Asynchronous) |
| USB compatibility | Windows 7 / 8 / 8.1 / 10 / 11 (with driver) MAC OSX, IOS, Linux, Android (without driver) |
| General | |
|---|---|
| Power supply | 100-240V AC |
| Energy consumption | < 50W Standby: < 0.5W |
| Dimensions | 225 x 55x 199.3mm (WxHxD) |
| Weight | 1.76kg |
| Package | 1x D&A Alpha Pro 1x USB-A to USB-C cable 1x Mains power cable |
| Input | Bluetooth |
| Input | RCA |
| Input | Optical |
| Input | USB |
| Input | SPDIF |
| Output | XLR |
| Output | Jack 4.4mm |
| Output | RCA |
| Output | Jack 6.35mm |
| DAC / ADC Chip | ES9039MPro / ES9039MSPro |
| Max sampling rate | 768kHz |
| Max sampling rate | DSD512 |
| Max sampling rate | MQA |
| Color | Silver |
| Class | Class A / AB |
| Networking | No |
| Remote Control | No |
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