1-2

Rated Input Power

2.0W /4.0V

1-3

Max Input Power

2.5W /4.47V

1-4

Nominal Impedance

8Ω±15% (at 1kHz 1.0Vrms input)

1-5

DC   Impedance

7.8Ω±10%

1-6

Resonance Frequency(f0)

650±20%Hz  1.0V input

1-7

Sound Pressure Level

SPL：82±3 dB  At 0.5M /1W

500,   600, 800, 1000Hz  Average

1-8

Frequency Range

F0~   20 kHz  (Average SPL-10 dB)

1-9

 Distortion

Max   10% (free air/0.5m /4.0V,At 1kHz)  

1-10

Rub & Buzz

(Rated   input power / sinusoidal wave / sweep)

There   shall be no buzzes, rattles nor any spurious acoustic noises  2.0W/50-5kHz

1-11

Operation Test

Must   be normal at sine wave and program source 2.0W

1-12

Polarity

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

1-13

Operating Temp Range

-20℃   ---- +40℃

1-14

Storage   Temp Range

-30℃   ---- +70℃

1-15

Appearance

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