64Audio Duo IEM — hifisoundgear
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64Audio Duo IEM

$1,199.00
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Immerse Yourself in Sound with 64Audio Duo

The Duo's twin drivers and impressive tech package are all you need to enjoy an immersive sound experience in an IEM. By pairing a dynamic driver and tia Balanced Armature with revolutionary techs like Apex Core and Wave Sync, 64Audio has produced an impressive IEM that you can enjoy anywhere, anytime.

64 audio duo front view with cables

What's In The Box?

Everything you need is included with the 64Audio Duo IEMs!

  • Duo Universal in-Ear Monitors
  • 64 Audio Premium Leather Case
  • TrueFidelity Foam Eartips (S,M,L)
  • SpinFit Silicone Eartips (S,M,L)
  • Silicone Eartips (S,M,L)
  • Black Premium Cable
  • Round Sticker
64 audio duo box and accessories laid out on white background

64Audio Duo In-Ear Monitor Technical Details

The Duo comes with proprietary 64Audio technologies for enhanced comfort and sound.

  • Tubeless In-Ear Audio (tia)
  • Air Pressure Exchange (Apex)
  • Linear Impedance Design (LID)
  • Wave Sync

All-Natural Power - 64Audio Duo IEM

Listen to the Duo for the first time, and you'll quickly notice its big natural sound courtesy of the single dynamic driver handling and the tia Balanced Armature.

Bass-heavy tracks rumble with natural impact and texture, while instrumentals and vocal-centric tracks come alive with life-like clarity and tone.

The 64Audio Duo will play back your music with extra energy that will leave you tapping your toes for hours on end.

64 audio duo side and front angled view on white wood table

Natural Sound with Unique Semi-Open Shell Design - 64Audio Duo

One of the Duo's most unique features is its semi-open back shell design, which looks amazing while offering enhanced sound.

The open design enhances in-ear comfort by venting out extra air - all while extending the soundstage for a truly immersive listening experience.

64 audio duo front and side view on wood table

Hear Pure, Unrestricted Sound with the 64Audio Duo tia Sytem

The Duo boasts a complete tia system, consisting of the tia Open Balanced Armature, Single-Bore, and Acoustic Chambers system.

These three systems allow the Duo to deliver sound from its drivers straight to your ears for unmatched clarity, detail, and tone.

64 audio duo tia acoustic chamber close up view

In-Ear Comfort Redefined - Duo Apex Core

The Duo is the first of its kind to feature Apex Core technology - a variation of 64Audio's patented Apex tech, designed to provide enhanced in-ear comfort and sound.

Derived from 64Audio's deep understanding of air movement inside an earphone, Apex Core enhances sound while ensuring minimal ear fatigue.

Air produced by the Duo's drivers is vented out naturally through the open grille design for expanded soundstage and reduced risk of in-ear pain or fatigue - perfect for long listening sessions at home or in the office.

64 audio duo back view without cables

Supremely Cohesive Sound - Wave Sync + LID Tech

The Duo features Wave Sync technology to ensure the dynamic driver and tia Balanced Armature produce perfectly matched sound

Meanwhile, LID or Linear Impedance Design technology ensures the Duo's drivers sound consistent across all frequencies no matter where you plug it in.

64 audio duo internal components outlines exploded view

Sleek Looks. Lightweight Feel - 64Audio Duo Black Premium Cable

The Duo comes with 64Audio's Black Premium Cable:

  • 0.23 Ohms Total Impedance
  • 7 x 7 x 4 Multi-Twist
  • Silver Plated OCC Copper Wire
  • 26 AWG
  • Terminated in 3.5mm
64 audio duo black premium cable coiled on white wood surface

64 Audio Duo Frequency Response

The Duo covers frequencies starting from 20hz and extending to 20kHz - allowing for a wide range of frequencies to be reproduced accurately.

64Audio Duo vs U4s

Duo:

2 Drivers

20hz – 20kHz Frequency Response

9Ω Impedance @1kHz

Integrated 2-way Passive Crossover

U4s:

4 Drivers

10hz – 20kHz Frequency Response

11Ω Impedance @1kHz

Integrated 4-way Passive Crossover

Our Analysis:

  • The Duo is tuned to deliver strong bass rumble and impact while maintaining a smooth top-end. This IEM suits bass-centric genres like EDM, Pop, and R&B
  • The U4s leans more towards a warm-neutral tuning with lean detailed bass, energetic midrange, and sparkly highs. A great IEM for those looking for an engaging sound.

64Audio Nio vs Duo

Nio:

9 Drivers

10hz – 20kHz Frequency Response

6Ω Impedance @1kHz

Integrated 4-way Passive Crossover

Duo:

2 Drivers

20hz – 20kHz Frequency Response

9Ω Impedance @1kHz

Integrated 2-way Passive Crossover

Our Analysis:

  • The Nio offers a fun and powerful sound signature meant for enjoying all types of music.
  • The Duo offers strong bass impact, accurate tone, and a wide soundstage. Best for bass-heavy music like EDM, Dubstep, or Pop.

64 Audio Duo Price

The 64Audio Duo is an entry-level universal hybrid IEM. Priced at $1,199, the Duo offers an engaging sound with its powerful, detailed bass and smooth top-end tuning.


64 Audio Duo Specifications

Specification Description
Driver Configuration: 1 tia High Driver – 1 Dynamic Low Driver
Frequency Response: 20Hz – 20kHz
Sensitivity: 98 dB/mW Sensitivity
Crossover: Integrated 2-way Passive Crossover
Impedance: 9Ω Impedance @1kHz
Apex Technology Isolation: -12dB Isolation apex Core Technology

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Shipping is FREE on all orders to customers within the USA.

We don't want to mess around with fine print and extra charges. We like things to be simple and easy. 

Here's how shipping works around here:

  1. Place your order
  2. You'll receive a confirmation e-mail. This means we've received your order and have pre-authorized your payment method.
  3. We check the stock levels on your product.
    • We do this because we're a small family-owned business. Many of the products we source directly from the brands, and we don't keep their inventory levels updated.
    • If it's available, we'll get it shipped within 3 business days.
    • If it's not available, we'll reach out by email and make alternate arrangements.
  4. You'll receive another email with shipping/tracking information.

Learn More

While we fully stand by every product that we sell, we understand that sometimes you might change your mind or realize the product you ordered wasn't exactly what you were hoping for.

Here's a quick rundown of our return policy.

  • 365 Day Returns, for ANY reason.
  • You will pay NOTHING for the return.
    • ZERO Return Shipping Cost
  • You will receive your hard-earned money back in your pocket.
  • HiFiSoundGear will pay for shipping defective, damaged, or incorrect merchandise at our cost.

Learn More

We get it. You've got a lot of choice when it comes to online retailers. Here's why we think you should shop with us at HiFiSoundGear.

  • Free Shipping in the USA. No extra charges. Ever.
  • Price Match Guarantee. Best prices online guaranteed.
  • Zero Shenanigans. If we can't help you, we won't pretend like we can.
  • 365 Day Generous Returns. Not happy with your product? We'll take it back - no questions asked.
  • Great Service. We pride ourselves on the best service, anywhere.
  • Your Satisfaction Guaranteed. We handpick our products for quality, and we know you'll love them. But if there is ever something wrong, we'll fix it.
Free Shipping. We'll deliver the goods - at zero cost to you.
Generous Returns FREE 365-day returns from date of delivery.
Friendly service. We might even make you blush.
Zero shenanigans. If we can't help you, we won't say we can.

64Audio Duo IEM Reviews

Want the best price on this product?
CALL OR TEXT US
365 Day Returns Not the right fit? We’ll buy it back.
Try out your new gear, on us. TIDAL HiFi Plus, free with every purchase.
Free Extended Warranty We’ve got you covered for 5 years after purchase.
Service Discount Are you Military/Police/Fire?
GET DISCOUNT
Free Shipping Straight to your door.
Price Match Found a better price? We’ll beat it by 5%.
Authorized Dealer Genuine gear, warranties included.
Free Shipping. We'll deliver the goods - at zero cost to you.
Generous Returns FREE 365-day returns from date of delivery.
Friendly service. We might even make you blush.
Zero shenanigans. If we can't help you, we won't say we can.
Military/Police/Fire We appreciate you. Contact us today.
Price Match Promise We dare you. Find a better price.
Secure Checkout We'll make sure your info is safe.
Authorized Dealer Standard warranties included.