The Hidizs S9 Pro Plus, codenamed 'Martha,' is a compact portable DAC/AMP designed for audiophiles, featuring advanced audio processing capabilities. It utilizes a fourth-generation processing circuit architecture, consisting of a USB interface processor, DAC, independent headphone amplifier, and a POP sound cancellation system. The device employs the ES9038Q2M DAC chip, allowing for decoding of PCM up to 32bit/768kHz and native DSD up to DSD512. Power output reaches 138mW for the 3.5mm single-ended output and 180mW for the 4.4mm balanced output at 32Ω. It has six selectable digital filters that modify the playback characteristics, providing versatility according to user preferences. The S9 Pro Plus has a sleek design made from aerospace-grade aluminum, with dimensions of 55mm x 25mm x 11mm and weighing only 17g. It features USB-C connectivity and dual audio output options, accommodating various headphones. The device is compatible with multiple platforms, including Windows, macOS, iOS, and Android. Without a built-in battery, it draws power from the connected source, leading to modest battery drainage. The package includes a USB-C to USB-C cable, a USB-C to USB-A adapter, and a manual. The visual aspect of the device is accentuated with RGB lighting indicating the active sampling rate during audio playback.
