Product Description

4004ST 300ohms edition

40MM Titinium dome and multi-layer composed diaphragm speaker drivers

15.5mm-diameter magnets *3pieces delivers powerful bass,*normal speaker has got 1pc magnet*

16core large voice coil and special composed diaphragm

Non-mass production item,designed and redesigned many times during past 6months to sattle all its parameters. ELFINEAR Engineer presents for audiophiles

This unit good at bass and treble

Parameters:
Mode: 4004ST
Type: Dynamic
Use: HiFi
Diaphragm:Titinium dome&multi-layer composed
Magnetic circuit form: Internal magnetic formula
Frequency: full range
Rated power: 20mW
Impedance:32 ohm/ 300ohm
Frequency: 20-20KHZ
Directivity: the marked color point is the unit positive pole
Sensitivity: 118dB/W
Distortion: 1 TMD%

Packaging:
2* Headphone Speaker unit
Instructions:
Please test the speakers with a multimeter before soldering.
The colored spot is for positive pole +, the other side is for negative -.
Soldering with less than 3 seconds. Otherwise, the voice coil or circuit board can be burned out easily.

Note:All ELFINEAR Driver units have \curve\ distortion\phase\the DB value\voice frequency sweep pairing\ tested and confirmed before shipping. After receiving the drivers, please check the package and test its qualtiy by using a multimeter or other devices before welding, due to the unit belongs to the perishable goods, warranty are not provided after welding.