Harman-Tuned Neutral Sound

The CU8 is meticulously tuned to the Harman neutral target curve and verified with professional artificial-ear measurements. From 20 Hz to 20 kHz, it delivers uncolored, faithful reproduction—whether you’re phase-matching on a master track or enjoying uncompressed audio, you’ll experience studio-monitor–level precision and detail.

PUR Vibration Control System

Equipped with micro-alloy spring suspensions on its mid and low-frequency drivers, the CU8’s PUR Vibration Control System lowers resonance points to enhance density and dynamics. Remarkably, just four balanced armature units achieve the richness and impact you’d expect from configurations with twice as many drivers.

Gold-Plated Brass Acoustic Chamber

Crafted from precision-milled brass with a density of 8.96 g/cm³—over three times that of standard resin—the CU8’s housing suppresses unwanted vibrations and elevates both tactile feel and acoustic clarity. This rigid chamber ensures the purest signal path from driver to ear.

Artisanal Hand-Finishing

Every pair of CU8 earphones is shaped and polished by skilled hands. Through careful hammering, grinding, and buffing, each unit becomes a fusion of audio engineering and artisanal artistry—time-honored craftsmanship encoded in metal and form.

Premium Detachable Cable

The detachable cable features 24 AWG silver-plated, oxygen-free copper (40 strands of 0.005 mm wire per core) with PTFE insulation (dielectric constant 2.1) to minimize distortion. WBT silver-alloy solder ensures rock-solid connections and transparent, full-bandwidth transmission.

Technical Details

Model
CU8
Driver Configuration
4 Balanced Armature Drivers per side
Core Technology
PUR Vibration Control System
Frequency Response
10 Hz – 20 kHz
Impedance
17 Ω @ 1 kHz
Crossover Design
3-Way (Low / Mid / High)
Sensitivity
108 dB
Connector Type
Embedded 0.78 mm 2-Pin
Shell Material
Gold-Plated Brass
Craftsmanship
Jewelry-Grade Finishing
Cable Length
1.2 m
Packaging Dimensions
14.65 × 10.45 × 4.9 cm
Weight (with packaging)
190 g
Inside the Box
  • 1x CU8 In-Ear Monitors
  • 1x Earphone Package
  • 1x Storage Pouch
  • 3x Silicone Eartips (S/M/L)
  • 1x Detachable Cable

30-Day Return Policy

You may return any non-customized product that is still factory sealed, within 30 days upon receiving it. For items that are damaged, incorrect, or faulty upon delivery, Linsoul will assess the issue and provide a solution accordingly.

1 Year Warranty

The HeartField CU8 Comes with a 1 year warranty on In-Ear Monitors and 3 month warranty on the cable.

Customer Reviews

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H
Head-Fi Drock6
Harman Craftsmanship 💎

The HeartField CU8 is an aesthetically gorgeous IEM with accurate and musical tonality. The soundstage is immersive, and it works well with all genres. Excellent!

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