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China Mylar Speakers 2040mm Rectangle - High SPL Micro Speakers from Trusted Suppliers and Factory
Electrical Characteristics
1. Scope
This specification covers our product of mylar speaker unit for use in DVD, telephone, alarm system and calling system.
2. Electrical & Acoustical Characteristics
| Parameter | Specification & Conditions |
|---|---|
| 2.1 Sound Pressure Level (S.P.L) |
Mean value measured at specified frequency range. 81 ± 3 dB at 1200, 1500, 1800, 2000 Hz (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 1 KHz, 1V) Measure Condition: the impedance response is measured with Mylar speaker. Measurement Circuit: shown in Fig. 2. |
| 2.4 Frequency Range |
Fo ~ 20 KHz (Deviation 10 dB from average S.P.L.) Frequency Response Curve: Shown in Fig. 3. With IEC Baffle plate. Frequency Response Measurement Circuit: Shown in Fig. 2. |
| 2.5 Rated Input Power (Continuum) | 2.0 W |
| 2.6 Max Input Power (Short-Term) |
2.0 W 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 1 KHz, 2.0 W Measurement Circuit: Shown in Fig. 2. |
| 2.8 Operation | Must be normal at sine wave and program source 2.0 W. |
| 2.9 Polarity | When a positive DC current is applied to the terminal marked (+), diaphragm shall move forward. |
| 2.10 Pure Sound Detection | Buzz, Rattle, etc. should not be audible at 4 VRMS sine wave from Fo ~ 10 KHz. |
3. Dimensions (Fig. 1)
Fig. 1 — Speaker Unit Dimensions
4. Frequency Measuring Circuit — Speaker Mode (Fig. 2)
Fig. 2 — Frequency Measuring Circuit (Speaker Mode)
Applications
Headphones
Intercoms
Electronic Toys
Blood Glucose Meters
Industrial Packing Equipment
Electronic Stethoscopes
Mini Bluetooth Speakers
Drive-Through Communications
Laboratory Centrifuges
Laptops / Desk Computers
Printers / Fax Machines
Frequently Asked Questions (FAQ)
Q
What is the rated impedance of this mylar speaker unit?
The rated impedance is 8 ± 20% Ω, measured at 1 KHz and 1V. The impedance response is measured directly with the Mylar speaker using the circuit shown in Fig. 2.
Q
What is the sound pressure level (SPL) of this speaker?
The SPL is 81 ± 3 dB, measured as the mean value at 1200, 1500, 1800, and 2000 Hz. The measurement is performed with a sin swept signal at 0.1W on axis at 0.1M distance.
Q
What is the maximum input power this speaker can handle?
The maximum short-term input power is 2.0W. Testing is performed using an IEC filter with a white noise source for 1 minute, with no degradation in performance allowed.
Q
What applications is this mylar speaker unit suitable for?
This speaker unit is suitable for a wide range of applications including headphones, intercoms, electronic toys, blood glucose meters, industrial packing equipment, electronic stethoscopes, mini Bluetooth speakers, drive-through communications, laboratory centrifuges, laptops, desk computers, printers, and fax machines.
Q
What is the resonance frequency (Fo) of this speaker?
The resonance frequency is 980 ± 20% Hz measured at 1V with no baffle. The measurement circuit is as shown in Fig. 2 of the specification.
Q
How is the polarity of this speaker defined?
When a positive DC current is applied to the terminal marked (+), the diaphragm moves forward. The polarity marking is clearly indicated on the speaker unit to ensure correct installation.