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1 pair (2 pieces) 7.8mm Ultra Low THD Titanium Drivers

$25.99 $12.99

7.8mm Ultra Low THD (<0.03% at 1kHz) Titanium Drivers, most recommended for our Sennheiser IE800 shell

  • Driver Type: Dynamic
  • Diaphragm material: pure Titanium (i.e., not compound Titanium in most IEMs), very rare and only available in very Hi-End IEMs
  • Impedance @ 1kHz: 16 Ohms, suitable for smart phones, iPhones and iPads, strongly recommend working with earphone amplifiers.
  • Sensitivity: 115 dB SPL/V
  • Flat frequency response – 10-20000Hz
  • Harmonic distortion < 0.03%, ultra low 
  • Power: 5MW ~ 20MW
  • Magnetic steel: NdFeB
SKU: 7.8mm Ultra Low THD Titanium Drivers Category:

Description

Features and specifications

This is a pair of 7.8mm Titanium diaphragm drivers with ultra low THD – 0.03% at kHz and outstanding performance at mid band – the best driver unit for male vocals! and works best with our Sennheiser IE800 ceramic shells.

Package

1 Pair (2 pieces) 7.8mm Ultra Low THD Titanium Drivers

2 pieces of front cover spacer (for air sealing in installation)

Measurements

Measurement is done by an IEC711 coupler, a customized USB sound card and Win10 PC running ARTA software.

Open Space measurement – meaning the install the driver only to the front cover, and leave the back end open to free space.

7.8mm Ultra Low THD Titanium Driver Unit

Measurement setupFrequency response (open space)

7.8mm Ultra Low THD Titanium Driver Unit
Open space FR

Impulse response (open space)

7.8mm Ultra Low THD Titanium Driver Unit
Open space Impulse Response

Cumulative Spectral Decay (open space)

7.8mm Ultra Low THD Titanium Driver Unit
Open space CSD

Burst Decay (open space)

7.8mm Ultra Low THD Titanium Driver Unit
Open space BD

Close space measurement with IE800 shell– meaning the install the driver is fully installed in to Sennheiser IE800 shell .

7.8mm Ultra Low THD Titanium Driver Unit
Close space measurement setup

Frequency response (close space) – notice there is a 4dB drop on sub-bass, others are not impacted.

7.8mm Ultra Low THD Titanium Driver Unit
Open space FR

Impulse response (close space)

7.8mm Ultra Low THD Titanium Driver Unit
Close space impulse response

Cumulative Spectral Decay (close space)

7.8mm Ultra Low THD Titanium Driver Unit
Cloise space CSD

Burst Decay (close space)

7.8mm Ultra Low THD Titanium Driver Unit
Close space BD

Frequency response after fine tuning

You may notice there is a 5dB burst on 4-6kHz in the original frequency response. To high gain on the mid normally not a big problem for vocal (some earphones branding themselves on “sweet female vocal” actually gain from this burst), but may make the overall character too bright. By applying damping materials in the front canal, it’s easy to suppress the burst and boost bass a little bit. See following curve – Red is the original FR and Blue is after applying damping – you can see the blue cure has +2dB  gain on bass and low-mid, and the 5kHz burst is well suppressed.

Proceed with caution: dynamic driver is 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 managed down both in your DIY.
  • Installation: the driver has Sintered NdFeB Magnetic inside with extremely strong attraction power. Damage may caused by attracting anything hitting the fragile diaphragm. 
  • Others: applying high-voltage, storing in high temperature/humidity environment… all may cause unrecoverable damage.

Additional information

Weight 0.1 kg
Dimensions 15 × 10 × 3 cm

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