HiFiMAN HM800 Mini DAC/Amp (Wired)

Note: HM800 is a fully balanced, in-line mini DAC/amp designed for in‑ear monitors—not a headphone or standalone music player.

Your IEMs, Reborn: Balanced R2R Sound From Any USB‑C Device

If you love the intimacy and detail of great IEMs but hate carrying a brick‑sized player or dongle stack, the HM800 puts reference‑grade clarity in a module barely larger than a coin. HIFIMAN’s HIMALAYA R2R DAC and a fully balanced Class AB amplifier live right on the cable—so your smartphone becomes a genuinely hi‑fi source with the natural timbre and effortless dynamics audiophiles crave.

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Why Audiophiles Choose This Product

• Strong, natural sound: R2R (ladder) conversion and a NOS filter aim for lifelike, grain‑free timbre with excellent microdetail—an aesthetic many listeners prefer for vocals, strings, and acoustic recordings.
• Engineering that matters: A fully balanced signal path from DAC to amplifier, using HIFIMAN’s HIMALAYA R2R architecture and an independent Class AB amp, delivers low noise (112 dB SNR) and low distortion for clean, dynamic playback.
• Ultra‑portable, in‑line design: At just 9.65 g, HM800 sits between your USB‑C source and IEMs—no desk dongle or rubber bands required. It’s about the size of a U.S. quarter.
• Broad IEM compatibility: Dual MMCX balanced outputs with three included adapter cables (MMCX‑to‑MMCX, MMCX‑to‑0.78 mm 2‑pin, MMCX‑to‑0.75 mm 2‑pin) make HM800 plug‑and‑play with most modern IEMs.
• Purpose‑built for today’s sources: USB‑C input works with many Android devices and USB‑C iPhones; Lightning‑based iPhones can connect via a compatible adapter. Designed specifically to turn your phone into a high‑resolution source.

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What’s Included

• HM800 Mini DAC/Amplifier (fully balanced, HIMALAYA R2R architecture)
• USB‑C to USB‑C cable (approx. 1 m)
• Earphone cables:
  • MMCX‑to‑MMCX
  • MMCX‑to‑0.78 mm 2‑pin
  • MMCX‑to‑0.75 mm 2‑pin
• Earphone travel case
• Owner’s guide and warranty card
  Package contents per official documentation.

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Technical Specifications

Specification	Value	Notes
Product Type	Wired mini DAC/amp	USB‑C input; dual MMCX balanced output via included IEM cables.
DAC Architecture	HIFIMAN HIMALAYA R2R (NOS)	Ladder DAC with NOS filtering for natural timbre.
Amplifier Topology	Fully balanced Class AB	Independent AB stage for low distortion and punchy dynamics.
Output Power	40 mW × 2	Suited for modern, efficient IEMs.
Signal‑to‑Noise Ratio	112 dB	Low noise floor preserves microdetail.
THD+N (Amp)	0.01%	Clean amplification.
THD+N (DAC module)	0.0025%	Very low conversion distortion.
Supported Audio	PCM up to 24‑bit (via USB Audio)	Designed to make smartphones true hi‑fi sources.
Input	USB‑C	Connects to phones, tablets, and computers with USB‑C.
Output	Dual MMCX (balanced)	Adapters for MMCX and 2‑pin IEMs included.
Weight	9.65 g (excl. cable)	Ultra‑light for true pocket portability.

Notes:

• HM800 does not have a 3.5 mm headphone jack; it is intended for IEMs using MMCX or 2‑pin connectors. For full‑size headphones or 3.5 mm cables, choose a conventional dongle DAC/amp instead.
• iPhone users: USB‑C iPhones connect directly; Lightning models require an appropriate Apple adapter.

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Professional Recognition

• Showcased at CanJam NYC 2022 (February 26–27, 2022), where HIFIMAN introduced HM800 alongside other HIMALAYA‑based designs.
• Press coverage emphasized its “fully balanced” design and its role in “turn[ing] any smartphone into a high‑resolution audio source.”
• HIFIMAN heritage: founded by Dr. Fang Bian, the company pioneered high‑end portable players with the HM‑801 and is renowned for planar‑magnetic headphones and innovative DAC/amps.

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The Bottom Line

HM800 is the minimalist path to maximum fidelity for IEM owners. By moving a balanced R2R DAC and Class AB amplifier onto your cable, it removes bulk without compromising sound—delivering clarity, texture, and dynamic punch from the device you already carry. If you want true hi‑fi from your phone and modern IEMs, HM800 is a smart, travel‑ready upgrade that feels invisible until the music starts.

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Guidance for Amplifiers/DACs

• Inputs/Outputs: USB‑C input; dual MMCX balanced outputs with adapters for MMCX and 2‑pin IEMs.
• Power: 40 mW × 2—ideal for efficient IEMs; not intended for hard‑to‑drive over‑ear headphones.
• Features: HIMALAYA R2R NOS DAC, fully balanced path, independent Class AB amplification, ultra‑light 9.65 g in‑line form factor.

Research Notes and Validation

• Specs and weight confirmed on HIFIMAN’s official product page.
• Architecture, balanced design, and use‑case verified via HIFIMAN press materials and retail partners’ technical descriptions.
• Package contents and cable set cross‑checked against the published owner’s guide.