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64 Audio
64 Audio Trio Universal Hybrid In-Ear Monitors

64 Audio Trio Universal Hybrid In-Ear Monitors

4.9(25 ratings)

Lowest price, any size

$2,299.00at ListenUpChecked Nov 8

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Our take on the 64 Audio Trio Universal Hybrid In-Ear Monitors

The 64 Audio Trio is a three-driver hybrid in-ear monitor built for audiophiles who want a smooth, musical sound rather than a bright, analytical one. A dynamic driver handles lows and mids, a balanced armature covers high-mids, and a tia high driver sits at the nozzle with no sound tube in front of it. The tia system, internal apex pressure relief and LID impedance matching let it run from a phone or a dedicated player without changing its tuning. Its 5.5-ohm impedance is very low, so it can hiss or shift tonality on sources with high output impedance. Owners rate it highly for tonality and staging; the trade-offs are modest isolation and a fit that rewards tip rolling.

Best forAudiophiles who want a warm, fatigue-free signatureLong listening sessions at low to moderate volumeListeners who switch between phone and dedicated playerBuyers who value build and cable quality
Pros
  • Tubeless tia high driver gives an open, airy top end
  • Dynamic low driver delivers weighty, natural bass
  • LID keeps the tuning stable across different sources
  • Milled aluminum shells feel solid and well finished
  • Silver-plated OCC copper cable included
  • Internal apex relief reduces eardrum pressure over long sessions
Cons
  • Very low 5.5-ohm impedance makes it picky about source output impedance
  • -15 dB isolation is modest for noisy commutes
  • Three drivers means less fine detail than higher-tier 64 Audio models
  • Fit depends heavily on tip choice
  • Premium build and cable push it into a high price tier

64 Audio Trio Universal Hybrid In-Ear Monitors prices at every store

  • ListenUpNew

    In stockReturn policy

    $2,299.00Checked Nov 8
    Visit ListenUp

What reviewers say

  • 4.9 / 525 ratings

Owners rate the Trio very highly, calling it one of the most musical hybrids in its class. They praise the natural tonality, the bass weight and the wide staging, and note it stays smooth rather than harsh. Complaints center on source matching and isolation.

What people mention
  • TonalityPraisedOwners describe a smooth, musical signature that stays engaging without sounding bright.
  • SoundstagePraisedListeners report a wide, open presentation that feels lifelike.
  • BassPraisedThe dynamic driver is said to give bass real weight and texture.
  • Source matchingMixedThe very low impedance means some sources add hiss or shift the tuning.
  • IsolationCriticisedThe -15 dB isolation is called modest, so outside noise gets through.
  • FitMixedComfort is good once sealed, but owners say tip choice matters a lot.

About the 64 Audio Trio Universal Hybrid In-Ear Monitors

The 64 Audio Trio is a universal-fit hybrid in-ear monitor with three drivers per side. A dynamic driver handles lows and mids, a balanced armature handles the high-mids, and a tia high driver handles the highs. The tuning is mildly warm and smooth, with impactful bass and open treble.

The design is fully tubeless, using the complete tia system with its acoustic chambers and single-bore design. Apex pressure relief is built into the shell and gives -15 dB of passive isolation. LID circuitry keeps the frequency response consistent regardless of source impedance. The FXC (Frequency eXtension Chamber) shapes airflow around the dynamic driver to improve midrange control.

The shell is milled from solid aluminum with a brushed aluminum faceplate in neutral grey. It comes with a black 3.5mm cable made of silver-plated OCC copper.

Drivers
1 dynamic (mid/low), 1 high-mid balanced armature, 1 tia high balanced armature
Crossover
Integrated 3-way passive crossover
Frequency response
5 Hz – 22 kHz
Sensitivity
104 dB/mW @ 1 kHz
Impedance
5.5 +0.5/-1.5 Ω (10 Hz – 20 kHz)
Isolation
-15 dB (internal apex technology)
Shell
Milled aluminum with brushed aluminum faceplate
Color
Neutral Grey
Fit
Universal
Cable
3.5mm black premium cable, silver-plated OCC copper, 7x7x4 multi-twist, 26 AWG, 0.23 Ω
Technology
Full tia system, internally integrated apex, LID circuitry, FXC (Frequency eXtension Chamber)

Questions and answers

Does the Trio need a dedicated player or amp?
No. LID impedance matching keeps its tuning consistent from a phone or a dongle. A cleaner, low-impedance source avoids hiss.
How does it compare with 64 Audio's higher models?
The Trio uses three drivers and a tubeless tia high driver. Models like the U12t add more balanced armatures for finer detail, while the Trio stays warmer and more forgiving.
What is in the box?
The monitors, a 3.5mm silver-plated OCC copper cable and a premium leather case, plus the usual tip selection.
Is the bass too strong for neutral listeners?
It leans warm and full rather than flat. Those who want a reference-flat response may find it colored; most owners call it natural.
Can I use it for commuting?
It works, but -15 dB isolation lets in traffic and engine noise. Foam tips help a little.
What impedance should my source have?
Keep output impedance low, ideally under 1 ohm, because the Trio's 5.5-ohm load is sensitive to it.
Where is the 64 Audio Trio Universal Hybrid In-Ear Monitors cheapest?
At ListenUp, for $2,299.00, as of our latest check.
What do buyers say about the 64 Audio Trio Universal Hybrid In-Ear Monitors?
Rated 4.9 out of 5 from 25 ratings.

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In the box
Premium leather case, TrueFidelity foam tips (S/M/L), SpinFit silicone tips (S/M/L), standard silicone tips (S/M/L), cleaning tool, cable clip, round sticker
Origin
Designed and assembled in the USA with globally sourced components
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