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| Quantity: | |
|---|---|
high quality 4inch audio speakers 102mm 4ohm 20w auto loudspeaker
| Attribute | Value | ||
| 1.1 Rate power | 20 W | ||
| 1.2 Max power | 40 W | ||
| 1.3 Sensitivity | 89±3dB(AT 0.1M/0.1W, AT 0.6,0.8,1.0,1.2KHZ) | ||
| 1.4 Impedance | 4Ω±15% | ||
| 1.5 Frequency | Fo~~20KHZ | ||
| 1.6Resonance frequency | 80 hz±20% | ||
| 1.7 Distortion rate | ≤5% | ||
| 1.8 Magnet size | 70x8mm 5oz | ||
| 1.9 Weight | 400g±8% | ||
| 2.0 Size | 4"(135MM) |
Speaker classification introduction
As a single speaker is incapable to provide the whole range of audio frequency so the loudspeaker consists of different driver units which are as follow –
1) Tweeter (for High-frequency range)
2) Mid-range driver (for Middle-frequency range)
3) Woofers (for Low-frequency range)
Types of speaker
The speakers can be classified in many different ways. On the basis of amplification, they can be classified as follow –
1) Passive Speaker
2) Active Speaker
Passive Speaker – The passive speaker does not have built-in power amplifier. So they need to connect to an external power amplifier for high power output. Most speakers that are commercially available are passive type due to their small size.
Active Speaker – This type of speaker has inbuilt power amplifier for high and low frequency. So they are also called as Powered Speakers. But they are bulky as compared to the passive one so they are less used commonly.
Speaker structure
NO | 零件Component |
1 | 压边 Gasket |
2 | 盆架 Frame |
3 | 音圈 Voice coil |
4 | 弹波 Damper |
5 | 华司Washer |
6 | 磁铁 Magnet |
7 | T铁 T-yoke |
8 | 鼓纸 Cone |
9 | 帽子 Dust cap |
10 | 接线板 Terminals |
Packaging style
FAQ
1.Can you provide samples?
Of course, we can provide 2 free samples, and the sample delivery time is 7-10 days.
2. I would like to know procurement lead time
Please contact us when you need the latest lead time information because it will be changed depend on the market condition.
3. What about the Minimum Order Quantity?
Please confirm with the sales before placing the order. If there are raw materials in stock, 1,000 pieces of a single variety are acceptable.
4.Can customize,modify and develop products according to the design drawing?Yes,we provide OEM service and can customize products according to the drawing.
5.What about terms of payment?
Payment terms: T/T, west Union.
Company introduction and workshop photos.
Hongchang(changzhou) electronic co., Ltd is a manufacturing enterprise that started in 1997 and has more than 20 years of production experience.
The main products are Speaker unit, alarm buzzer, piezo element and ultrasonic sensor.
Speaker: piezo tweeter, mylar speaker, loudspeaker, tweeter speaker, TV speaker, car speaker, multimedia speaker, woofer, sub-woofer, waterproof speaker etc
Buzzer: piezoelectric (piezo) vibration element, piezoelectric buzzer, magnetic buzzer, SMD buzzer
Ultrasonic sensor: for car parking system or distance measure.
Now we have 185 staffs, especially including 18 acoustic engineers, we provide products customization service, offer free sample for test. we are focus on product innovation , Management innovation. The quality of product was recognized by customer from all over the world.
Production line
