This specification covers our product of dynamic speaker unit for cordless/mobile telephone and ear phone use.
2. GENERAL REQUIREMENTS
2.1 OPERATING TEMPERATURE RANGE: -20℃ ~ +70℃
2.2 STORAGE TEMPERATURE RANGE: -40℃ ~ +80℃
3. WEIGHT: Approx 2.1 gram
4. TEST CLIMATIC CONDITIONS
STANDARD TEST CONDITIONS: JUDGEMENT CONDITIONS:
Temperature: 17～25℃ Temperature: 20±2℃
Relative Humidity: 45%～80%(RH) Relative Humidity: 60%～70%(RH)
Air Pressure: 860～1060 hPa Air Pressure: 860～1060 hPa
5. ELECTRICAlL REQUIREMENTS
5.1Rated Impedance (in 1.0cc box) 4.0±15% ohms @2kHz, 1Vrms input
5.2 Rated Noise Power (in 1.0cc box) 2.0 Watts
5.3 Short Term Maximum Power (in 1.0cc box) 2.5Watt
6. ACOUSTICAlL REQUIREMENTS
6.1 Sound Pressure Level (in 1.0cc box) 100±3dB at 2.0W/10cm at 1KHz
6.2 Bass Resonance Frequency
4.2.1 Resonance frequency in free air 600±20% Hz
4.2.2 Resonance frequency(in 1.0cc box) 950±20% Hz
6.3 Rated Frequency Range
Frequency Response See Figure 2
Test at 2.0W/10cm
6.4 THD See Figure 3
(Mounted in 1.0cc measure box and in a baffle) Test at 2.0Vrms/10cm
6.5 Rub & Buzz
A sine sweep among 300-5000Hz at 2.0Vrms with 1.0cc back cavity will not result in any buzzing or extraneous sound.
7. POLARITY REQUIREMENTS
7.1 When a DC sources "+" polarity is attached to speaker's "+" polarity, "-" polarity is attached speaker's "-" polarity, the membrane will move forward.
7.2 SPL and Frequency Response Curve(fig.1)
Electrical and acoustical measuring condition
7.3 Frequency Response Curve (fig.2)
7.3 Frequency Response Curve (fig.2)
Resonance frequency in 1cc closed box
7.4 THD (fig.3)
7.4 THD (fig.3)
Mounted in 1cc closed box and in a baffle
Limit date for THD
Frequency(Hz) | Limits |
500 | 35 |
800 | 20 |
1000 | 10 |
8000 | 10 |
8. RELIABILITY TESTS
The sound pressure as specified shall neither deviate more than ±3dB from the initial value, nor any significant damage after any of following testing.
8.1 HIGH TEMPERATURE TEST
High temperature: +80±2℃
Duration: 96 hours
8.2 LOW TEMPERATURE TEST
Low temperature : -40±2℃
Duration: 96 hours
8.3 HEAT SHOCK TEST
High temperature: +80±2℃
Low temperature: -40±2℃
Changeover time: < 30 seconds
Duration: 30minutes
Cycle: 10
8.4 HUMIDITY TEST
Temperature: +40±2℃
Relative humidity: 90～95%
Duration: 40 hours
8.5 DROP TEST
Mounted with dummy set mass: 100 g
Height: 1.5 m
Cycle: 6 (1each plain)
Onto the concrete board
8.6 Operating Life:
White Noise Connected 100HZ High Pass Filter，in 1CC BOX, Rated Power: 2.0W 48Hours
9.MECHANICAL LAYOUT & DIMENSIONS (Fig.4)
Unless otherwise specified, tolerance: ±0.2 (unit: mm)
The sound pressure as specified shall neither deviate more than ±3dB from the initial value, nor any significant damage after any of following testing.
8.1 HIGH TEMPERATURE TEST
High temperature: +80±2℃
Duration: 96 hours
8.2 LOW TEMPERATURE TEST
Low temperature : -40±2℃
Duration: 96 hours
8.3 HEAT SHOCK TEST
High temperature: +80±2℃
Low temperature: -40±2℃
Changeover time: < 30 seconds
Duration: 30minutes
Cycle: 10
8.4 HUMIDITY TEST
Temperature: +40±2℃
Relative humidity: 90～95%
Duration: 40 hours
8.5 DROP TEST
Mounted with dummy set mass: 100 g
Height: 1.5 m
Cycle: 6 (1each plain)
Onto the concrete board
8.6 Operating Life:
White Noise Connected 100HZ High Pass Filter，in 1CC BOX, Rated Power: 2.0W 48Hours
9.MECHANICAL LAYOUT & DIMENSIONS (Fig.4)
Unless otherwise specified, tolerance: ±0.2 (unit: mm)
Fig.4 Mechanical layout & dimensions
Bill of Material
ITEM | DESCRIPTIONS | SPEC. | SUPPLIER | QTY | REMARK |
1 | Leaf spring | Stainless stell | Pengbang | 2 | |
2 | Frame | PPA | Pengbang | 1 | |
3 | Yoke ass'y | Plastic | Shanglong | 1 | |
4 | Voice coil | Cu. wire | zizhi | 1 | |
5 | pole plate | 08F | shanglong | 1 | |
6 | Magnet | Nd-Fe-B | zhongzheng | 1 | |
7 | Diaphragm | PEEK | zizhi | 1 | |
8 | Front cover | PPA | pengbang | 1 |
10. PACKING (Fig.5)
TBD
TBD
