ELFINEAR GRE40 G-Ti 40mm 4th Gen Graphene Upgraded Unit Audiophile Headphone Driver

This flagship headphone upgrade unit is purpose-built for Hi-Fi enthusiasts. Equipped with a 40mm 4th-generation upgraded graphene composite titanium dome diaphragm, it pushes the hardware configuration to the absolute audiophile level. It is not in the same performance tier as ordinary first-gen 40mm graphene headphone drivers, representing a full generational leap in audio performance.

Core Hardware Specs

- Diaphragm: Composite structure of upgraded graphene and titanium dome, combining the ultra-fast transient response of graphene and the high rigidity, high-resolution performance of titanium film
- Magnetic Circuit System: 3.0mm thick N52 high-strength magnet with central-tuning architecture, which greatly improves magnetic field utilization and minimizes harmonic distortion
- Voice Coil: Large black enameled copper-clad aluminum voice coil, which achieves ultra-light weight while ensuring sufficient power handling capacity, delivering far more dynamic sound performance than ordinary units

Professional Lab Tested Performance

Every single unit is calibrated and tested piece by piece on the CRY6151 professional electroacoustic analyzer, to guarantee outstanding factory consistency:

1. Low-resistance version measured data: 117.42dB sensitivity at 1KHz, 37.3Ω measured impedance at 1KHz, total harmonic distortion below 3% across the full 20Hz-20kHz frequency range
2. High-resistance version measured data: 115.89dB sensitivity at 1KHz, 371.1Ω measured impedance at 1KHz, total harmonic distortion below 3% across the full 20Hz-20kHz frequency range
3. Uniform positive polarity (+) for all units, no extra pairing or adjustment required, drastically lowering the threshold for DIY headphone modification

Frequency Response & Sound Performance

The measured frequency response curve maintains an almost perfectly flat output from 20Hz to 1kHz, delivering tight, full-bodied bass with deep extension, free from the muddy, boomy distortion that plagues ordinary budget drivers. The midrange offers rich vocal density and precise imaging, making human voice reproduction transparent and lifelike without sounding hollow or distant. The high-frequency extension is smooth and extended, restoring every subtle detail of the recording while effectively suppressing harsh peaks and unwanted sibilance. The overall signature is balanced and fatigue-free, perfectly suited for nearly all music genres including pop, classical, vocal and instrumental tracks.

Dual Versions for Different Usage Scenarios

The low-resistance variant features exceptional straight-drive compatibility. It can be easily powered by smartphones, portable music players and regular portable DAC/amps, no expensive high-end equipment is required to achieve outstanding sound quality, making it ideal for upgrading portable daily-use headphones.
The high-resistance variant is tuned specifically for professional desktop audio systems and premium headphone amplifiers. It delivers a higher ceiling of dynamic range and resolution, fully unlocking the full potential of professional audio gear, and is the top pick for veteran audiophiles to modify their flagship over-ear headphones.

This driver is a cost-effective audiophile-grade choice for over-ear headphone DIY projects and refreshing vintage headphones. You can finish the modification quickly after receiving it, and easily get a Hi-Fi listening experience far superior to mass-produced stock headphones.