ZEN One Signature Our ZEN One Signature takes the DAC stage from the ZEN DAC V2, adds S/PDIF inputs (optical and coaxial) alongside the USB port, and 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 result? 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 your digital devices, from smartphones and tablets to PCs and Macs, disc players, and audio servers to TVs and games consoles. Home Hub DAC The ZEN One Signature is the first ZEN DAC to support all hi-res: DSD256, PCM384, MQA384kHz, Bluetooth 96KHz. 96kHz Hi-Res Bluetooth: LDAC, HWA/LHDC, aptX Adaptive/HD/LL, AAC USB audio using 16 Core 2000MIPS XMOS low latency microcontroller (MQA decoder) Fully balanced 4.4mm output Purity of design, no headphone amp, no volume control. The ultimate DAC for all your home audio sources.