Rated Input Power

2.0W /4.0V

Max Input Power

2.5W /4.47V

Nominal Impedance

8Ω±20% (at 1kHz 1.0Vrms input)

Resonance Frequency(f0)

950±20%Hz  1.0V input

Resonance Frequency(fb)

600±20%Hz  1.0V input

Sound Pressure Level

SPL：87±3 dB  0.2M /1W  At 1000Hz

Frequency Range

400~   15 kHz  (Average SPL-10 dB)

 Distortion

Max   5% (free air  1m /1W   At 1kHz)  

Rub & Buzz

(Rated   input power / sinusoidal wave / sweep)

There   shall be no buzzes, rattles nor any spurious acoustic noises  2.0W/100-5kHz

Operation Test

Must   be normal at sine wave and program source 2.0W

Polarity

When   a positive DC Current is applied to the voice coil terminal marked +or red   ,the diaphragm shall move forward

Operating Temp Range

-25℃   ---- +65℃

Storage   Temp Range

-30℃   ---- +75℃

Appearance

Should   not exist any obstacle to be harmful to normal operation damages cracks rusts   and distortions etc.