Source: Corporate website, Last Accessed: 2022/02/23

The ZEN One Signature takes the DAC stage from the ZEN DAC V2, adds S/PDIF inputs (optical and coaxial) alongside the USB port, stirs in Bluetooth technology from the ZEN Blue V2 and seasons the pot with Signature-grade circuit enhancements to create a delicious audio brew.
The ZEN One Signature is a pure DAC (no built-in headphone amp and volume control) that serves as a home audio hub for all digital devices, from smartphones and tablets to PCs and Macs, disc players and audio servers to TVs and games consoles.
The ZEN One Signature is the first ZEN DAC to support all hi-res: DSD256, PCM384, Bluetooth 96kHz (through LDAC codec) and features a USB audio interface based on 16 Core 2000MIPS XMOS low latency microcontroller, as well as an upgraded GMT femto-precision clock and customized digital filter to "eradicate jitter and other forms of digital distortion", iFi says.
According to the details published, the Bluetooth streaming is supported by iFi's “ Bluetooth engine”, featuring Qualcomm’s new QCC5100 Bluetooth processing IC in combination with proprietary circuits, supporting aptX Adaptive and aptX HD, Sony’s LDAC and HWA’s LHDC, regular aptX and aptX Low Latency, AAC (Apple iOS devices) and SBC (the "plain vanilla" Bluetooth codec). Of the 24-bit-capable codecs, aptX Adaptive and aptX HD support up to 48kHz, while LDAC and LHDC reach 96kHz. The Bluetooth engine can be updated over-the-air, so future codecs may be added.
D/A conversion is handled by Burr-Brown's True Native chipset followed by fully balanced analog circuit with 4.4mm balanced and RCA single-ended analogue outputs to connect to an integrated amp, preamp, headphone amp or active loudspeakers. There is, also the possibility to use an S/PDIF (RCA) digital output, to use the device as a USB/SPDIF converter or a Bluetooth/SPDIF converter.
Component quality is quite high, with Texas Instruments' low-noise ICs along with Vishay MELF resistors, Panasonic OS-CON caps totaling 5,410uF as well as muRata control-type, low-ESR high-Q multi-layer capacitors and ELNA Japan Silmic II capacitors for the power supplies.

For more information: https://ifi-audio.com/

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