28MM Mylar speaker 8ohm 1W for Telecom Voip

Item	Specification	Condition
Dimensions	φ28*5.4H mm
Nomial Impedance	8±15% OHM	At 1.0KHz / 0.89V
Input power	Rated:1W/Max:2W	At 2.83V / 4.0V
Resonance Frequency	710±20%Hz	At 0.89V
S．P．L．	94±3 dB(0.1W/0.1M)	At0.8K/1.0K/1.2K/1.5KHz (Average)
Frequency Range	F0~20K	Output S.P.L. -10dB
Distortion	5%Max	At 1.0KHz 0.1W/0.1M
Buzze & Rattle	Not be audible sine wave between at2.83V /200~5KHz.
Polarity	Diaphragm shall move forward.
Load test	Must be normal after load test: white noise 24 hours.
High TEMP test	After having been in a test chamber for 48 hours at the condition of +60 ℃
	20~25%R.H and keep 2 hours.
Cold TEMP test	After having been in a test chamber for 48 hours at the condition of －25℃±3℃
	and keep 2 hours.
Humidity test	After having been in a test chamber for 48 hours at the condition of +40 ℃
	90~95%R.H and keep 4 hours.
Weld	terminal weld: 350℃/≤2~3sec*2bit.
Store TEMP	－25℃ To +60℃

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