[Graphene] Hi-Res Earphone with MMCX MXH-GD300


Newly developed 13mm large Graphene drive unit.


Detachable MMCX plug to match your favorite cable.


Stainless steel alloy + high-rigidity resin case, creates delicate but powerful sound.


Large bus-port design for rich volume of sound.


What is “Graphene”?

Characteristics of Graphene
Graphene is a thinnest but also the hardest nano-flat film extracted from a mixture of carbon atoms.
Due to it carries stronger molecular chain than diamonds, it is said that Graphene is the most advanced material in the world in terms of hardness, tensile strength, electrical conductivity and thermal conductivity.

Effect on sound quality

According to the characteristics of Graphene, the following effects are expected:

Speed of sound transmission
Perform integrated profile with excellent reproducibility in the high frequency range.

Hardness that does not deform when vibrating
Suppress split vibration occurs during high speed vibration of diaphragm, greatly reducing the turbidity, distortion and attenuation of the sound.

Extreme light weight that allows the diaphragm to vibrate quickly
Graphene diaphragm exerts superior rapid response characteristics, enhances transient resolution and high frequency extension.

New release! 13mm large Graphene drive unit.
Adopted 13mm large drive unit with Graphene diaphragm that is harder than diamonds, with lightweight CCAW voice coil enhances transient resolution. Perfectly shows the ideal balance in entire frequency range.

Stainless steel alloy + high rigidity resin case
High-strength, high-ratio stainless steel alloy carry out excellent acoustic properties, coupled with a high-rigidity resin case, capable to suppress the disturbing resonance, create delicate but solid and powerful sound.

Detachable MMCX plug
match your favorite output lines freely.

Rich volume at low frequency range
Large bus-port design for reproducing enriched volume of sound.

Maxell’s own advanced acoustic technology
Only products with Maxell advanced acoustic technology are allowed to be crowned with this mark.
Inspired by the initial of Maxell and Music – “m”, The three vertical lines represent the past, present and future, and the horizontal line represent the “voice” of people connected to three different timelines.


Diaphragm typeClosed dynamic
Driver diameter13mm
Frequency response10-40,000Hz
Max power50mW(IEC*1)
Cable length1.2m(Y-type detachable)
Plug3.5mm L-shape
WeightApprox. 24g (cable included)
AccessoryEar-tips (2pcs each for S/M/L size), 2 memory foam ear-tips, protective case.


*1 Measured values under IEC (International Electrotechnical Standard)


เสียง [Graphene] Hi-Res Earphone with MMCX MXH-GD300