Hifiman He400i 2020 Version Review

If you want a short answer: the hifiman he400i 2020 version is a compelling entry-point planar-magnetic headphone for listeners who prioritize detail and an airy soundstage and are willing to pair it with a reasonably capable source. This hifiman he400i 2020 version review lays out who should buy it, how it compares to alternatives, what to listen for during an audition, and practical trade-offs before you spend money.

After comparing the main options side by side and checking manufacturer listings and retail storefront descriptions, I ranked candidates against criteria tuned to real buyers: sound quality per dollar, comfort for long sessions, ease of driving from portable sources, and build/fit for everyday use. The HE400i 2020 lands on the list because it delivers planar-magnetic character at a price point and ergonomic package that make it useful for desktop listening, hobbyists, and anyone upgrading from standard dynamic headphones.

Table of Contents

Quick picks and how I ranked them

Ranked by buyer-practical criteria – entry price, feature balance for that price, and how forgiving the headphone is with common sources:

Best overall planar value: Hifiman HE400i 2020 version – good detail and soundstage for the money if you plan to use a desktop amp or a high-output portable DAC/amp.

Best portable alternative: Sturdy closed-back or compact planar headphones – choose these if you need isolation or frequent mobile use.
Best reference dynamic alternative: Mid-tier open-back dynamics – pick these if you want easier driveability from phones and portable dongles.
Best step-up planar in the Hifiman family: If you want more refinement, consider Hifiman’s higher-tier planars (research current product pages for exact model differences).

My ranking criteria written as buyer rules:

Rule 1: Sound-per-dollar beats absolute technical specs for most buyers.

Rule 2: Comfort for sessions longer than 1 hour matters as much as raw resolution.
Rule 3: If you can’t or won’t pair with a desktop amp, penalize planars in the ranking.

Comparison table: name, price/key spec, best for

Name	Price / Key Spec	Best For
Hifiman HE400i 2020 version	Price varies by retailer / Planar-magnetic, open-back (manufacturer descriptions list planar models in the brand lineup)	Buyers wanting planar-magnetic clarity and stage for desktop listening
Mid-tier open-back dynamic (example: classic reference models)	Price varies / Dynamic driver, open-back	Listeners needing easier driveability from phones and portable DACs
Closed-back portable alternative	Price varies / Closed-back isolation	Commuters and mobile users who need isolation
Higher-tier planar (same brand)	Price varies / Planar-magnetic with premium materials	Audiophile hobbyists who want smoother treble and better imaging

Table note: price cells intentionally state “varies” – verify current street price at retailers before purchase.

How the HE400i 2020 version fits into practical buyer choices

Hifiman’s product lines include several planar-magnetic models; the HE400i 2020 revision targets buyers who want planars without the top-tier price. Expect the characteristic planar strengths – fast transient response and a spacious, open presentation – paired with the trade-offs typical of open-back electroacoustic designs: sound leakage and a need for a decent source to show its best.

Comparing the spec sheets side by side for typical planars and dynamics, the core differences that matter to buyers are these: planar drivers generally provide lower distortion for midrange detail and a consistent driver motion, while dynamic drivers tend to be easier to drive from low-power sources and often produce more emphasized mid-bass without external amplification. The HE400i 2020 sits with other entry-level planars that prioritize clarity and stage over warm, bass-forward signatures.

What to expect from sound and performance (qualitative listening guide)

Expect a detailed midrange and an expansive sense of space. Planar designs often present imaging that feels more layered than typical dynamics at similar prices. Treble presentation can be extended; listen for sibilance or brightness on test tracks if you are treble-sensitive.

Bass behavior on planars differs from dynamics: bass response is typically quick and controlled rather than heavy or punchy. That translates to precise rhythm and fast decay, which benefits fast-paced electronic, orchestral, and acoustic recordings. Electronic and pop music can still impress, but don’t expect the “thump” of closed-back, bass-forward headphones.

Listen for these specific cues during an audition:

Percussive decay: play a track with mallet or plucked instruments and listen for the natural decay and lack of lingering boom.

Vocal placement: check whether vocals sit forward or are more embedded in the mix; planars often reveal micro-detail that can make a vocal feel close without harshness.
Stereo imaging: with stereo recordings, move your head slightly; an open, airy stage that places instruments beyond the cups is a positive sign.
Treble edge: use a track with cymbals and breathy vocals to ensure no unpleasant sibilant spikes.

Comfort, build, and real-world ergonomics

Comfort is a primary buying criterion. The 2020 revision across Hifiman models focused on improving headband ergonomics and pad comfort compared with older heads, but buyers should still try a demo where possible because fit varies by head shape.

Check these build items before you buy:

Headband clamping force: a light-to-moderate clamp improves seal without pressure points; over-tight clamps hurt long listens.

Earpad material and depth: deeper pads help ear clearance for glasses and longer sessions.
Cable type and connectors: detachable cables and standard connectors increase future-proofing and make replacing a lost cable easier.

Practical durability note: planars typically use thin diaphragms that are mechanically delicate compared with thick-dome dynamics. Treat them like precision gear – store them on a stand and avoid crushing the cups.

what buyers must know

Planar headphones often benefit from higher voltage or current than many smartphone outputs provide. If you plan to use the HE400i 2020 from a phone or low-power USB dongle, expect a quieter and less dynamic presentation than when paired with a desktop DAC/amp. A properly matched amp brings out transient speed, bass control, and improved soundstage.

Pairing checklist:

Use a source with a dedicated headphone output that lists medium-to-high output capability, or use a small desktop amp with adjustable gain.

If you use a portable DAC/amp, pick a model with higher output power and an agreeable impedance match.
For critical listening, connect via a line-level output and a quality amp rather than relying on phone headphone jacks.

Avoid these pairing mistakes:

Plugging into low-output USB dongles and judging the headphone’s full potential.

Using EQ to fix perceived lack of bass without confirming that the source is under-powering the headphone.

Trade-offs and who should avoid the HE400i 2020

Trade-offs are central to buying decisions. If isolation, portability, or driving from a phone without an amp are priorities, pass on the HE400i 2020. Open-back planars leak sound and accept room reflections as part of their presentation, which makes them poor fits for shared spaces or commuting.

Situations where the HE400i 2020 is a poor match:

Frequent travel, public transit, or noisy environments – open-back leakage will annoy others.

Users who insist on the most bass-heavy, consumer-tuned sound from a single-box solution – planars give control and clarity, not bass exaggeration.
Buyers unwilling to add a small amp or pay for a more powerful source – underdriven planars can sound thin.

Situations where the HE400i 2020 shines:

Desktop listening in a quiet room with a DAC/amp.

Critical listening, mixing, or a hobbyist setup where revealing detail and imaging matter.
Replacing mid-tier dynamic headphones when the listener wants a more precise midrange.

Alternatives to consider and best-by-use-case categories

Comparing the HE400i 2020 to alternatives clarifies value. The table below lists representative alternatives by use case; exact prices and model numbers change, so verify current retail listings.

Best For	Alternative Example	Why Choose It
Easier drive from phones	Mid-tier open-back dynamics	Easier to drive, less need for an amp; warmer bass signature
Portable/noise isolation	Closed-back models	Isolation and suitability for mobile use
Refined planar upgrade	Higher-tier planars from same brand	Better materials, smoother treble, more refined staging
Tight budget with decent staging	Budget open-back budget dynamics	Lower cost while preserving openness and enjoyment

My verdict on alternatives: pick an alternative only after identifying your primary listening context (phone vs. desktop, commute vs. quiet room). The HE400i 2020 is sensible for quiet-room desktop listeners; choose a dynamic or closed-back alternative if mobility or easy driveability matters more.

How to audition the HE400i 2020

Bring specific tracks and a known reference source to any audition. Use lossless or high-bitrate streams if possible. Here is a practical audition checklist and step-by-step guidance.

Choose three reference tracks that you know intimately – one acoustic vocal, one orchestral or piano piece, and one percussive electronic or pop track.

Use the same source and gain setting for every headphone you audition to keep comparisons fair.
Listen at medium levels for at least 10 minutes per track; planars can reveal strengths after a short burn-in period in your ears.
Note percussion decay, vocal isolation, and stereo image width on a small scoring sheet.
Try a track with heavy cymbal content and headphone-rotated small head movements to assess treble comfort.

Bulleted audition checklist:

Percussion decay: crisp or boomy?

Vocal clarity: forward or recessed?
Imaging: instruments placed outside the head or glued to the ears?
Comfort after 30+ minutes: any pressure points?
Driveability: loudness at phone-level output, and at a powered amp output.

Common mistakes buyers make

Buyers frequently commit the same errors when buying planars like the HE400i 2020:

Assuming no amp is needed: many planars sound thin and underwhelming on low-power sources.

Expecting heavy bass: planars often prioritize accuracy over artificial bass boost.
Skipping a real audition: online impressions vary wildly; what sounds bright to one person may sound detailed to another.
Confusing model revisions: make sure a listing explicitly states “2020 version” and read the seller’s product notes carefully.

Avoid these mistakes by verifying the seller returns policy and confirming exact revision markings on retailer product pages prior to purchase.

Maintenance, accessories, and long-term ownership

Treat planar headphones as precision audio tools. Replacement pads, a proper stand, and a quality, possibly detachable cable extend lifespan and comfort.

Recommended accessory checklist:

Spare earpads from the manufacturer or third-party sources with similar depth.

A stand that gently cradles the headband and avoids cup pressure.
A quality cable; if the model has detachable connectors, standard replacements are widely available.

If you plan firmware-like updates or product revisions, check the manufacturer product page for official accessory lists and revision notes before ordering.

How I approached this review and what I could not verify

After comparing available product listings and the manufacturer’s retail storefront information, I focused on buyer-relevant attributes: driveability, comfort, sound presentation, and fit-for-purpose. The available retail listings confirmed that Hifiman lists planar-magnetic headphones in its range, and the HE400i 2020 appears as a 2020 revision in retail assortments.

Gaps in publicly available information constrained this review in two ways: exact numeric specs (impedance, sensitivity, measured frequency response) and current street prices vary by retailer and region. Readers should verify numeric specs and current prices on the retailer product page or the manufacturer’s listing before purchase. Any specific numeric performance claim was omitted because it could not be reliably extracted from the available product pages used for this guide.

FAQ

Is the HE400i 2020 version good for gaming?

The HE400i 2020 can work well for gaming in a quiet setup because of its wide stage and detail; open-back design will leak sound and does not provide isolation, and you will likely still need a separate microphone for voice comms.

Will the HE400i 2020 work with a smartphone?

It will work but may be under-driven by most smartphone headphone outputs. For fuller dynamics and better bass/impact, use a portable DAC/amp or desktop amplifier.

Are replacement parts and earpads easy to find?

Replacement earpads and third-party pads are generally available for popular over-ear models; verify pad shape and connector type with the seller or manufacturer before ordering accessories.

Does the 2020 revision change the sound from older HE400i models?

Retailers show the 2020 revision as a distinct SKU in many listings. Buyers should compare seller details and, if possible, audition both versions since manufacturers sometimes alter headband, pads, and tuning when revising a model.

Can I use the HE400i 2020 for mixing or professional work?

It can be suitable for hobbyist mixing and critical listening thanks to detail and imaging, but professional mastering or mixing workflows commonly use multiple monitoring references; treat the HE400i 2020 as one reliable reference among several.

Final recommendation

If your primary use is quiet-room desktop listening and you can pair the headphone with a competent amp or high-output portable DAC, the hifiman he400i 2020 version is a strong value proposition among planar-magnetic options – offering detail and staging that many listeners prefer over similarly priced dynamics. Next step: verify the exact seller SKU and current price online, audition with the tracks listed above using your typical source, and bring a desktop amp if you can to hear the HE400i 2020 at its best.