The AIYIMA H4 pairs an ES9039Q2M DAC chip with both 3.5mm single‑ended and 4.4mm balanced outputs and supports PCM384/DSD128 plus a DDC coaxial digital output. It’s a compact, feature-rich portable DAC/amp offering balanced drive (up to ~240mW@32Ω) and selectable performance/filter modes, but using DDC needs an extra 3.5mm→RCA cable and Performance mode increases power draw.
For portable listeners who want a compact DAC/amp with ES9039Q2M, balanced 4.4mm output, and digital pass‑through; avoid if you need true plug‑and‑play coaxial cabling or long battery runtime.
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