Fostex X Dekoni Audio - Blue

Planar Magnetic Headphone

Sale price₹ 13,999 Regular priceMRP: ₹ 24,999

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7 Day Replacement Guarantee

In case you receive the Fostex X Dekoni Audio - Blue with a manufacturing defect, please raise a return request within 7 days of delivery.

However, if you receive an incorrect / damaged / different product or one with missing accessories, please raise a return request within 24 hours of delivery. In case you receive a product with a missing, incorrect, or faulty accessory, you will be given a replacement accessory instead of the entire product.

Please make sure that the product is in the original packaging with all the accessories it came with. We'll also need an unboxing video and images of the parcel to investigate about the discrepancy. You may be asked to share images of the product and the packaging received for us to determine the damage or defect prior to approving the return request. The free replacement will be shipped only once the original order is returned.

A replacement will be issued only if:

- It is found to be defective
- It is determined that the product was not damaged while in your possession
- The product is not different from what was shipped to you
- The product is returned in original condition (with brand’s/manufacturer's box, MRP tag intact, user manual, warranty card and all the accessories therein)


Warranty & Services

Don't sweat it, this Fostex X Dekoni Audio - Blue comes with a 1 Year warranty from Fostex that covers manufacturing defects. All products featured on Headphone Zone are backed by an original manufacturer's warranty.

Read more about Fostex's warranty in India.

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Why Fostex is Special


Designed in Japan

Established & Reputed

Trust us, our reputation in the audio world speaks for itself!

This headphone or gear comes from a well-respected brand known for its high-quality audio equipment, so you can be confident in your purchase.

If you see a product marked as “🎖️ Established & Reputed”, it means you're getting a top-tier device from a brand that's earned its stripes in the audio industry.


Born in 1948

Why we love this Headphone

Value for Money

Great sound always doesn't have to come with a fancy price tag.

Every once in a while we come across a product that give you a lot more value for the price.

If you see products marked as "🥜 Value For Money" you can be sure you're getting a great bang for your buck.

Ideal for Beginners

Lost in the Audio Maze? Let Us Guide Your Beginner Audiophile Journey!

If you are a newcomer in the audio world, this headphone or gear is a stepping stone for those overwhelmed by the plethora of options available.

If you see a product marked with “🌱 Ideal for Beginners," it indicates that this device is perfect for starting your audiophile journey.

Upgradeable Cable

Not happy with your current cable? Swap it out!

If you're searching for an in-ear monitor with a detachable design, these IEMs fit the bill.

If you see an IEM marked with "🔌 Upgradeable Cable," it means it comes with a detachable cable. You can easily swap or upgrade the cable, allowing for customization or maintenance whenever you desire.

Why it Sounds Amazing

Planar Magnetic Driver

Cutting edge driver tech for an immersive music listening experience.

The headphone or gear houses planar magnetic driver, utilising a thin, lightweight diaphragm with a planar magnetic field to produce incredibly detailed and accurate sound.

If you see a product marked with "🔈 Planar Magnetic Driver", it ensures an audio experience with exceptional clarity, precise imaging and a wide soundstage, making every note and nuance in your music come to life with stunning realism.

V-shaped Sound Signature

Perfect for those who like a party in their head.

This headphone or gear boosts the bass and treble for a dynamic and lively audio experience.

If you see products marked as “🌶️ V-shaped Sound Signature”, get ready for punchy lows and sparkling highs that make your music pop, perfect for energising your workouts, parties, or just jamming out.

Thick Bass / Kickass Bass

There are some headphones that just knock your socks off with high and impactful bass. There’s only one way to describe it - Kickass.

This headphone or gear is engineered to deliver powerful and thumping bass that adds an extra punch to your music, making every beat come alive.

If you see a product marked with "💣 Kickass Bass", it means this device is perfect for bass enthusiasts for an immersive audio experience that will make your music feel more intense and impactful.

Bright & Sparkly Highs

Who says Treble can’t be done right.

This headphone or gear shines the best for its ability to deliver crisp, clear, and shimmering high frequencies that stands out.

If you see products marked as “✨ Bright & Sparkly Highs”, you’re in for an auditory treat, enjoying every cymbal, note, and melody with unparalleled clarity and brilliance.

Like a Party in your Head

Looking for something that brings the party straight to your ears with your favourite music?

This headphone or gear is designed and tuned to deliver party-like sound quality, making your listening experience lively and energetic.

If you see a product marked with “🎉 Like a Party in Your Head", it indicates that this product provides an exhilarating audio experience, perfect for those who love vibrant and dynamic music sessions.

Aggressive and Energetic

Ready for an audio adrenaline rush?

This headphone or gear is built to deliver powerful, high-energy sound that keeps you on the edge of your seat, perfect for those who crave a thrilling, dynamic listening experience.

If you see a product marked as "🧨 Aggressive and Energetic”, it means this device pumps out intense, vibrant audio, ensuring your music is always lively and exhilarating.

Needs Amplification

I need more power to thrive.

This headphone or gear shines brightest with a bit of extra power. It’s designed to deliver top-notch performance when paired with an amplifier, giving you that full, rich sound you crave.

If you see a product marked as "🚂 Needs Amplification", it means this device is built to excel with an amp, ensuring you get the most out of your music with enhanced volume and clarity. Perfect for audiophiles who love their sound big and bold.


Dekoni Audio and Fostex have collaborated to develop a personalised version of the renowned Fostex T50RP MKIII Headphone, known as the Dekoni Audio Blue. By integrating Fostex's Planar Magnetic Drivers and Body, along with Dekoni Hybrid Ear Pads and other exclusive modifications, this headphone improves upon the original design. The enhancements result in reduced listener fatigue, smoother sound quality overall, and extended bass response. The Dekoni Blue headphones are accompanied by an extra pair of Dekoni Audio Elite Velour Ear pads, which incorporate the high-quality slow rebound, dense memory foam that Dekoni is recognised for.

NOTE:The Dekoni Audio Blue no longer comes with the T50RP Elite Velour pads, and now only ships with the Elite Hybrid pads.



Similar to the original Fostex T50RP, the Dekoni version incorporates copper-foil etched polymide film drivers that employ the exclusive Regular Phase (RP) technology, ensuring precise sound reproduction. With a frequency range spanning from 15 Hz to 35 kHz, these headphones accurately capture the entire sonic spectrum. The Dekoni Audio Blue Fostex/Dekoni HiFi Audiophile Planar Magnetic Headphones are crafted to emphasise a balanced and transparent audio profile. They are equipped with a removable cable, which can be easily replaced in case of loss or damage.



Despite their appearance, the Dekoni Audio Blue headphones boast surprising lightness. The Dekoni Blue variant weighs merely 11.3 ounces, excluding the cable. Right from the moment you put them on, it's clear that Dekoni Audio aimed for a more comfortable listening experience. The hybrid ear pads have been upgraded to the deluxe Dekoni Elite Hybrid pads, ensuring exceptional ear comfort. The headband is crafted to provide added comfort and stability, effectively preventing any slipping. Making adjustments to the headphones' length is effortless, facilitated by the metal sliders that glide smoothly through the mechanisms. Thanks to its Semi-Open back design, wearing these headphones for extended periods won't lead to fatigue or discomfort.

1 Year Warranty

Don't sweat it, this Fostex X Dekoni Audio - Blue comes with a 1 Year warranty from Fostex that covers manufacturing defects. All products featured on Headphone Zone are backed by an original manufacturer's warranty.

Read more about Fostex's warranty in India.


"if you’re looking for a fun headphone to listen to, one with further improvement capability and robust enough so you don’t have to handle them with white gloves then give the Dekoni Audio Blue a try by all means."

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"Dekoni Blue is a very good modification of the vastly popular T50RP by Fostex, providing a great build quality, comfort, and that smooth, easy tone."

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"It’s not only really smooth, it’s practically lubed up, gliding from big, soft-edged lows to expressive upper bass as well as I’ve heard from any non-reference headphone."

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Toms Guide

"These are entry-level cans with the comfort and sonic sharpness of high-tier headphones. The ability to customize them for fit and sound adds to their charm."

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Audiophile Heaven

"If you're looking for a pair of headphones with an excellent bass, delightful low end extension, explosive sub lows extension, Dekoni Blue will fit your head like a glove."

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