Dual : Dual-Stations 3D Woofer Sound’ that consisted by 2 unique technology ‘Air-
Conduction’ and ‘Bone-Conduction’.

Duals’ Woofer Earphone will produce incompatible and magnificent sound  . As a World first time, 10mm micro woofer speaker
can perform ultra low sub-woofer sound in earphone that has patented technology.

Specification
1. Decibel
Vibration : 68 ±3dB At 1.0KHz / 5mW
Speaker : 88 ±3dB At 1.0KHz / 5mW
2. Impedance
8 ± 15% ohm At 1.0KHz
3. Rated and max. voltage
Rated : 5mW (0.187Vrms) At 1.0KHz
Max. : 15mW (0.324Vrms) At 1.0KHz
4. Frequency
Vibration : 80Hz ~ 14KHz
Speaker : 80Hz ~ 13KHz
5. SIZE : Ø10 / 5t
Applied
Earphone, Headset,
Bluetooth earphone etc.

Specification
1. Decibel
Vibration : 64 ±3dB At 1.0KHz / 5mW
Speaker : 88 ±3dB At 1.0KHz / 5mW
2. Impedance
8 ± 15% ohm At 1.0KHz
3. Rated and max. voltage
Rated : 5mW (0.187Vrms) At 1.0KHz
Max. : 15mW (0.324Vrms) At 1.0KHz
4. Frequency
Vibration : 50Hz ~ 16KHz
Speaker : 50Hz ~ 16KHz
5. SIZE : Ø10 / 5t
Applied
Earphone, Bluetooth earphone etc.

Specification
1. Decibel
Vibration : 64 ±3dB At 1.0KHz / 5mW
Speaker : 88 ±3dB At 1.0KHz / 5mW
2. Impedance
16 ± 15% ohm At 1.0KHz
3. Rated and max. voltage
Rated : 5mW (0.187Vrms) At 1.0KHz
Max. : 15mW (0.324Vrms) At 1.0KHz
4. Frequency
Vibration : 50Hz ~ 16KHz
Speaker : 20Hz ~ 20KHz
5. SIZE : Ø10 / 5t
Applied
Earphone. Bluetooth earphone ,
3D glasses, google etc.

A Sub-woofer is only play ultra-low bandwidth speaker and it need bigger than 6 inch
(15.24cm) for proper performance. People can hear 20 Hz ~ 20 KHz and the ultra low
bandwidth(lower than 120Hz) can be play better in a bigger size woofer speaker. Due to this,
people prefer bigger than 12 inch (30.48cm). Sub-woofer need high power amplifier for
proper sound play back.