hydz 2040mm rectangle mylar speaker

1.SCOPE
This specification cover our product of mylar speaker unit for use in DVD, telephone, alarm system and calling system.

2.ELECTRICAL ANDACOUSTICAL CHARACTERISTIC

2.1. SOUND PRESSURE LEVEL (S.P.L)
Sound pressure level shall be indicated by the mean value of those measured at the
specified frequency range.81±3 dB at 1200、1500、1800、2000 Hz in average.
Measure Condition: sin swept measurement at 0.1W on axis at 0.1M
Measurement Circuit: shown in Fig. 2.

2.2． RESONANCE FREQUENCY(FO):980±20%Hz at 1V.(NO Baffle )
Measurement Circuit:Shown in Fig.2.

2.3. RATED IMPEDANCE: 8±20% Ω (at 1KHz, 1V)
Measure Condition:the impedance response is measured with Mylar speaker.
Measurement Circuit: shown in Fig. 2.

2.4. FREQUENCY RANGE: Fo~20KHz (Deviation 10dB from average S.P.L.)
Frequency Response Curve:Shown in Fig.3.Whit IEC Baffle plate.
Frequency Response Measurement Circuit: Shown in Fig.2.

2.5. RATED INPUT POWER (CONTINUUM): 2.0W

2.6. MAX INPUT POWER (SHORT-TERM): 2.0W
Testing will be done using IEC filter with white noise source for 1 minute
with no degradation in performance.

2.7. TOTAL HARMONIC DISTORTION: Less than 5% at 1KHz, 2.0W
Measurement Circuit:Shown in Fig.2.

2.8. OPERATION: Must be normal at sine wave and program source 2.0W.

2.9. POLARITY: When a positive DC current is applied to the terminal marked(+),
Diaphragm shall move forward. Marking:

2.10. PURE SOUND DETECTION:
Buzz,Rattle,etc Should not be audible at 4 VRMS sine wave from Fo ~ 10KHz.

3. DIMENSIONS (Fig.1)

4.  FREQUENCY MEASURING CIRCUIT (SPEAKER MODE)  (Fig.2)