Micro Tesla Driving Technology Biodiaphragm Drivers, Flagship Product of Earphone DIY Labs


SKU: 10mm Tesla Driver with 10μm Bio-Diaphragm Category: Tags: , , , ,



This is a pair of 10mm micro driver unit, flagship product of Earphone DIY Labs. This driver is built with MicroTesla Driving Technology and 10μm Bio-Diaphragm, and is designed to deliver the most nature sound, balancing deep low bass without sacrificing the mids and the highs. Earphones built with this driver could easily outperform most top commercial IEMs like Xelento or T8ie. The shell is plated with 24K gold to better resist electromagnetic interference.

  • The Micro-Tesla driving technology is characterized by maximum magnetic field to >1 Telsa focusing in the air gap inside the dynamic driver unit in a micro driving unit, which is 2 or 3 times higher than conventional IEM drivers.
  • Proprietary 10μm Bio-Diaphragm technology (bio-cellulose and inorganic fiber admixture) is used as a diaphragm material achieving rich very low frequency, natural mid-range and especially excellent presence in high frequency reproduction.
  • The overall impression is well balanced with ultra high resolution. 
  • The key benefits to users are
    • The ultra high density of the bass. With precise volume, the bass is well controlled and deeply extend to ultra low bass band. It’s the most punchy while balanced bass we’ve ever tested among tens of hi-end drivers! 
    • Ultra low distortion in the mid. Vocal is precisely positioned and sounds just as it shall be.
    • Unbeatable resolution at treble.You may feel it is too bright in the 1st few seconds if you haven’t tried top IEMs like IE800, T8iE, but then you will get it’s only because the high resolution to make details crystal clear – your ears are a little bit overloaded. 

We recommend using this driver with Mini Piano shell to fully explore its potential. 

Features and Specs

The 1st Tesla unit was presented Beyerdynamic on 2013 that the flux density (i.e., the magnetic filed strength) finally reaching more than one Tesla. The increase of the flux density can provide immense advantages. The voice coils can be more filigreed and consequently react more quickly, while the sound generated gains precision and richness in detail. At the same time, the energy utilization increases and the listener can play music louder. In other terms, the more the coil is for the driver, the greater details it can push out. See the pic below where we tear open an earphone,  take off the diaphragm and showing you the magnetic structure inside.

Besides the powerful magnetic field, the diaphragm and coils of the driver is still key factors of the sound character and quality.  The diaphragm is made by 10μm Bio-Diaphragm  (bio-cellulose and inorganic fiber admixture), same materials used Fostex TH-909 (Know more about Bio-Diaphragm and its advantages on Head-Fi). The coil is CCAW (Copper-clad Aluminium Wire) which is ultra thin and light.


Measurement is based on an IEC711 coupler, a customized USB sound card and Win10 PC running ARTA Software.

Frequency Response measurement

Notice the bass, mid and treble are perfectly balanced. And the bass well extend to <20Hz.

CSD (Cumulative Spectral Decay)

Notice the decay rate at 500hz-20Khz is very consistent, meaning less interference among bass, mid and treble.

Impulse response

Notice the response duration is ~2ms (the shorter the better), meaning high resolution and punchy bass.

Burst Decay

Notice the consistency among all the bands

Energy decay

Proceed with caution: dynamic drivers are with extremely fragile (1~5μm) diaphragm and can be easily damaged in following situations.

  • Soldering: overheated (>250 degree C) soldering iron or overtime soldering (>2s) may permanently damage the driver. Please heat the driver as little as possible during soldering.
  • Installation: the driver has Sintered NdFeB Magnetic inside with extremely strong attraction power. The fragile diaphragm may be damaged by having anything metallic hit it. 
  • Gluing: attaching glue either to the diaphragm or the backside holes may greatly alter the sound
  • Chemical: Applying any chemical solvent will void your warrant and we will not be able to help you
  • Others: applying high-voltage, storing in high temperature/humid environment… all may cause unrecoverable damage.

Additional information

Weight 0.1 kg
Dimensions 15 × 10 × 3 cm


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