HiFiMAN - RE400 (Unboxed)

1x DD In-Ears
Sale price₹ 1,799 Regular priceMRP: ₹ 3,999
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Flat Sound Signature

A Flat sound signature offers an accurate presentation of sounds without adding colour to your music. Simply put, this sound signature presents audio without boosting any frequencies. As a result, it’s the most natural-sounding signature and provides the closest reproduction of how a track was recorded and produced. Due to their accurate sound reproduction, flat sound signature headphones are preferred by Music professionals, Sound Engineers and used in professional studios for mixing and mastering music tracks and are also loved by audiophiles for immersive listening sessions. You can listen to Classical, Rock, Jazz, Blues, Folk & possibly every genre in music.

1 Year of

Ideal for Audiophiles

These earphones/IEMs are designed for discerning music lovers. If you are someone who cares about audio quality deeply, you'll want a pair of earphones/IEMs like these. You can expect them to present a Hi-Fidelity listening experience.

The audio quality exhibited by these earphones/IEMs is a beautiful mix of musicality, technical brilliance and high precision. These earphones/IEMs deliver a spacious and open soundstage with utmost clarity and detail. Delve into pure sonic bliss with these earphones/IEMs!

Ideal for Commuting

If you’re someone who enjoys listening to music while commuting, then you know the value of a good pair of earphones/IEMs. These earphones/IEMs allow you to listen to your favourite track or block out the world for a focused podcast listening experience.

You can expect these earphones/IEMs to offer a seamless connectivity experience. They are lightweight in design and provide noise isolation as an added functionality.

Ideal for Taking Calls

These earphones/IEMs are designed to present how audio tech, typically associated with listening to music, can be used for two-way communications.

If you are someone who is working from home and needs to do a conference call or have a video call, you'll benefit from a pair of earphones/IEMs with a mic.

You can expect these earphones/IEMs to offer good microphone quality and clear audio without having to connect additional peripherals. Just plug them in, and express yourself!


8.5mm Titanium
Dynamic Drivers

Works with Android & iOS

One thing all of our phones have in common is that they have replaced the portable media player. These headphones and devices are perfect to pair with your Android and iOS devices and offer functionality previously unknown. If you’re someone who usually switches between a variety of devices with different OS, then these are suited for you. You can expect these headphones and devices to connect seamlessly without any hassle and even offer OS-specific functionality depending on the device. Headphones and devices designed to work with Android and iOS come in wired and wireless formats. Quite often you will also find Hi-Fi equipment offering direct connectivity to devices with Android and iOS to simplify the connectivity process.

Tangle-Free Cables

Every time you reach for earphone/IEM cables to connect them to your earphones/IEM, no matter how neatly you "wrapped" them up, they end up in a giant Gordian knot of frustration. Tangled cables are the bane of modern existence, and everyone owning a wired pair of earphones/IEM can attest to this.

With advances in cable-making techniques and radical approaches to manufacturing, there are now several solutions to this universal problem. You get Flat cables, Mesh Design cables, cables coated with exterior covers and cables designed with a zipper style design to avoid Tangle and attempt to solve the issue.

Volume Controls

Headphone Zone Certified Unboxed Units

Unboxed units are as good as new products with the product's packaging being unavailable. These products give you the same satisfaction of new products - but at down-to-earth prices. Usually, the product's packaging may have gotten damaged in transit. Customers use a product once or twice and then return it with opened up packaging.

Customer Returns

Returned headphones are fully functional products that have left the warehouse and therefore can no longer be sold as new as their packaging has been opened. The product may have been used once or twice by the customer who returned it.

Transit Damages

Sometimes we receive headphones in damaged packaging due to shipping accidents. These are brand new headphones with cosmetic flaws on the packaging.

Save Upto 15%

Since you won't get the original packaging, we give you a good discount compared to a new headphone.

Professionally Inspected

A thorough inspection means you receive a 100% working headphone with no sound output issues.

Original Warranty

All unboxed headphones carry the same warranty period as a brand new headphone would.

Unbiased Customer Service

We have the same Headphone Zone customer support experience for Unboxed Products or new products.

Unchanged Replacement Policy

Received a defective Unboxed unit? Return it under our Replacement Policy.

All Original Accessories

The unboxed headphones itself comes with all original accessories.

1 Year Warranty

Don't sweat it, this HiFiMAN - RE400 (Unboxed) comes with a 1 Year warranty from HiFiMAN that covers manufacturing defects. All products featured on Headphone Zone are backed by an original manufacturer's warranty.

Read more about HiFiMAN's warranty in India.


"The affordable RE-400 have an attractive, understated design with machined-aluminum earpieces. They're lightweight and comfortable to wear and offer exceptionally pure and refined sound."

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"They has managed to spring a surprise with the RE-400 'Waterline'. They provide a subtle, refined and neutral sound that may not appeal to bass-heads, but will certainly be of interest to purists."

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"The RE400 is very lightweight and comfortable to wear, with a smooth and relaxing presentation. The great vocal performance makes the RE400 to a real joy, especially with acoustic songs."

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"It produces slightly weightier bass, a more well-rounded presentation, and smooth, forgiving treble while still offering accuracy on a level very rarely found at or near its price point."

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Customer Reviews

Based on 98 reviews
Ashutosh Kaithwar

Serious Sound
Very Natural and non fatiguing
What a comfort ...most comfortable IEMs ever used
Highs: revealing and warm
Mids: exceptionally detailed
Lows: Now I have read some reviews saying sub bass is missing...not for bass heads...blah...blah...I say if you crave for the bassline in the song..you can clearly hear through these without even muffled a bit...very very extraordinary presentation of low frequencies...example in the song feel right by Mark Ronson the bassline is extremely audible with clear note represtation...
This is highly recommended for budding audiophiles, music enthusiast and for regular commuters as they provide solid isolation also.
Must Buy !!!

Saptaswa Biswas (Purnea)
Much more than meets the eye...

The sound is mind blowing at the price range, although the piece they are giving at the price of 2k is Hifiman RE400a, that doesn't have braided cable, volume controls and the metal slider shown in the pictures. Kindly mention this in the description, HeadphoneZone. Hyper clarity in highs, mids and lows, the lows are not tuned for bassheads though. Appreciable soundstage and excellent sound separation, the flat sound signature being the USP of Hifiman-RE400. The small size and design of the earphones makes for a very comfortable fit, and the small bi-flange ear tips are quite good. The cables look and feel quite flimsy, so handle with care is an understatement in this case. Overall, keeping cable flimsiness aside, an absolute bang for the buck.

Rajni Bala
Real Deal

A sound signature like this, flat and accurate tonally correct is definitely not expected from an in ear headphines with 8mm drivers. Truly a surprise!

I mostly listen to classical.music and instantly caught on to previously muted undertones, the scratch of the players fingers on the guitar, the gentle creak of wood on the piano when I used these little monsters with my FLACs. They have a decent soundstage that extends beyond your ears to somewhere around the range of a helmet ( just didn't expect that on these small drivers). Noise isolation is passive but they rest inside the ear and provide a good seal thereby eliminating most noise in my experience.

The only negative is microphonics and cord noise as this definitely something you might want to consider. Don't consider them if you want to stay active like marathon running or gymming while wearing these as the cord noise might interfere with your enjoyment.

Sound quality is well worth the money, that is if you listen to instrumentals and high quality codecs. Otherwise you might want peppy headphones as these are really flat and neutral sounding( some people do enjoy it!)

Viswendra Singh
My new daily Driver, Driving my daily musical needs.

My Music Info:
I listen to a lot of Metal, mainly Thrash and Black metal, in a 18 hour day I listen to music for about 8 to 10 hours and these are truly a great pair of IEMs.

My Source Info:
Most of the time these are paired with my Fiio E07K DAC/AMP, for a brief time they got used with my OP3 and for around 1 hour they are used with Fiio X3II Hi-Res Player.

My Source Files:
Mostly I use Hi-Res Flac when playing through my amp or player.
320Kbps Mp3 are used for playback with my OP3.
All my sources and source files puts me in a state of bliss with worst of my earphones and let me tell you these are my 4th best earphones.

My sound Preferences:
Due to the nature of my musical interests a neutral sound is what I prefer the most but times comes when I tilt towards a little bass heavy EQ settings to accentuate Bass guitar.
Everything that I listen is played on a single EQ setting.

My review:
Bass: Well maintained, tight and responsive.

Mids: Male vocals are clean, female vocals are a bit harsh some times.

Highs: Cymbols are definitive and shimmers a lot but in a good way.

Sound stage: Every thing is placed where they should this is the only place where these outshines the Shure SE215s and defines the music a bit more.

Hello Vishwendra, thank you for shopping in our store. We value your encouragement and glad that you liked your earphones. Please do visit us again soon. :)

Pranav Agarwal (Delhi)
Close to great sound but fragile

The re400a are really good sounding earphones, they come with a lot if accessories. Choose the ear tips wisely cause they'll have impact on sound.
The build quality of earphones is really good but not of the wires. Mine broke after 1 month cause i am rough user, but i used jugaad and just tied the wires again and they're still working fine.