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Sabaj's A20d DAC and headphone amplifier is back in an improved version for 2023. Its digital/analogue conversion stage is now based on the use of two DAC chips, an AK4499EX using Velvetsound technology and an AK4191EQ. This combination is ideal for decoding high-resolution audio formats. The A20d also incorporates an XMOS XU316 USB interface and an MQA decoder. It is therefore capable of decoding up to 32bit 768kHz PCM, native DSD up to DSD512 and MQA format. Its amplification stage also makes it an excellent headphone amplifier, with a TPA6120A2 amplifier chip and two headphone outputs, one of which is balanced. Its full range of connectors also allows it to be used as a preamplifier, with three OPA1612 and stereo RCA and XLR line outputs delivering 2.3Vrms and 4.6Vrms respectively. High-performance and versatile, Sabaj's A20d also features Bluetooth 5.0 connectivity, so you can transmit your music wirelessly from a smartphone or tablet for example.
The high-performance AKM AK4499EX DAC chip is based on Velvetsound technology. Combined with an AK4191EQ chip, it enables extremely precise decoding of high-resolution audio formats. The result is excellent sound performance and reproduction that's as rich as it is detailed.
The 2023 version of Sabaj's A20d incorporates a third-generation XMOS XU316 USB interface with a 16-core processor. This interface supports 32bit 768kHz audio streams and native DSD up to DSD512.
MQA (Master Quality Authenticated) is an award-winning British technology that restores the sound of the original recording. The MQA Master file is authenticated by the artists, producers or rights holders. These files are light enough to stream or download.
The A20d 2023 incorporates an MQA decoder to read these files and deliver the best possible audio quality. It also supports the MQA-CD format via its coaxial and optical inputs.
In order to offer an enriched, qualitative and varied listening experience, Sabaj offers 4 different tonalities as well as 2 DSD filters and 7 PCM filters.
The Sabaj A20d 2023 incorporates a Bluetooth 5.0 receiver from Qualcomm, enabling you to stream your music remotely, from a smartphone for example. The on-board receiver chip also supports aptX, aptX HD and LDAC transmission codecs, ensuring excellent sound quality and transmission stability at distances of up to 20m.
The A20d 2023 benefits from a symmetrical headphone amplifier circuit incorporating a TI TPA6120A2 chip, offering reproduction over a wide frequency range and a low noise level. Output distortion is just -120dB and a gain setting (high = +8dB / low = 0dB) means the Sabaj A20d 2023 can be adapted to the vast majority of headphones on the market.
With its two balanced stereo XLR and stereo RCA line outputs and 3 AOP1612s, the Sabaj A20d can be used as a preamplifier. The balanced XLR output can reach a power of 4.6Vrms and the RCA output up to 2.3Vrms. Three different modes are available with the preamplifier function: the Vol Fixed mode where the volume is fixed on the XLR and RCA outputs, the Vol Variable mode allowing control of the output volume and the Fixed DSD Bypass mode for direct retransmission of the DSD signal.
The A20d 2023 features a power supply purification system with dedicated filtering circuitry to reduce noise and distortion, and deliver a clean, stable electrical signal to all audio circuits.
The A20d 2023 can be controlled remotely with its IR remote control. What's more, it features a high-resolution display showing information on the track currently playing.
| 1 | Display |
| 2 | Multi-function button |
| 3 | Single-ended Jack 6.35mm headphone output |
| 4 | Balanced Jack 4.4mm headphone outpût |
| 5 | Balanced XLR output |
| 6 | Single-ended RCA output |
| 7 | Coaxial input |
| 8 | Optical Toslink input |
| 9 | USB-C input |
| 10 | Bluetooth antenna |
| 11 | Power connector |
Technical characteristics
| Specifications | |
|---|---|
| Product type | DAC Headphone amplifier |
| Inputs | 1* USB-C 1* Optical Toslink 1* Coaxial Bluetooth |
| Outputs | 1* Single-ended stereo RCA 1* Balanced stereo XLR 1* Single-ended Jack 6.35mm headphone output 1* Balanced Jack 4.4mm headphone output |
| DAC chip | AK4499 EX + AK4191 EQ |
| USB interface | XMOS XU316 |
| Headphone amplification chip | TPA6120A2D |
| OPA | 1612 |
| Output level | RCA: 2.3Vrms XLR: 4.6Vrms |
| Headphone output power | 2x2W @ 16Ω 2x1W @ 32Ω |
| Headphone output gain | Low: 0dB High: +8dB |
| THD+N | Sortie casque: 0.0001% (-120dB) DAC: 0.00006% (-123dB) |
| Dynamic range | RCA: 126dB XLR: 131dB |
| SNR | RCA: 126dB XLR: 131dB |
| Output impedance | Headphone output: near 0Ω DAC: 100Ω |
| Bluetooth version | 5.0 |
| Suppported bluetooth codecs | SBC, AAC, aptX, aptX HD, LDAC |
| USB transmission | Asynchronous |
| USB compatibility | Windows 7 / 8 / 10 / 11 Mac OS X 10.6 and later Linux |
| Supported sample rates | USB: PCM up to 32bit 768kHz, Native DSD up to DSD512 Optical / Coaxial: PCM up to 24bit 192kHz, DSD DoP up to DoP64 |
| General | |
|---|---|
| Consumption | < 20W |
| Dimensions | 210*200*60mm |
| Weight | 1.5kg |
| Color | Silver |
| Package | 1* Sabaj A20d 2023 1* Power cable 1* IR remote control 1* Bluetooth antenna 1* USB-A to USB-C cable |
| Input | Bluetooth |
| Input | USB |
| Input | Optical |
| Input | SPDIF |
| Output | XLR |
| Output | Jack 4.4mm |
| Output | RCA |
| Output | Jack 6.35mm |
| DAC / ADC Chip | AK4191 |
| DAC / ADC Chip | AK4499EX |
| Max sampling rate | DSD512 |
| Max sampling rate | MQA |
| Max sampling rate | 768kHz |
| Color | Silver |
| Class | N/A |
| Networking | No |
| Remote Control | Yes |
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