products

Black Round Small Raw Audio Speakers 50mm Headphone Earphone Mylar Speaker

Basic Information
Place of Origin: China
Brand Name: Yuesonic
Certification: CE ,RoHS,REACH
Model Number: YD50-4R
Minimum Order Quantity: 10000pcs
Price: Basicly USD 0.1~1
Packaging Details: Neutral packaging/ Customise
Delivery Time: 2~4weeks
Payment Terms: T/T, Western Union,Paypal
Supply Ability: 300000pcs per month
Detail Information
Material: Metal SPL: 87±3dB
Color: Black Plug: Customize
Function: Speaker Certification: CE
Waterproof: Front Side Waterproof
High Light:

raw subwoofer

,

car woofer speaker


Product Description

Black round small mini 50mm mylar headphone earphone componment raw speaker driver doorbell ringing

1. Specifications

Sound pressure 79±2(A)AT  1m/1w
VOICE COLL IMP
RESONANT FREQ 230±20% HZ​
Temperature -20°C ~ 60°C
RATED POWER 2W
MAX POWER 3W
Weight 12.8g

 

2. Description

 

NO.

 

ITEM

 

SPECIFICATION

 

TESTING CONDITION

1

 

NOMINAL SIZE

Ф50 MM  
2

 

VOICE COLL IMP

8Ω ±15% AT 1.2KHz 1V
3

 

RESONANT FREQ

Fo 580±20% HZ AT 1.0V
4

 

OUTPUT S.P.L

MEAN VALUE

AT 0.8,1.0,1.2,1.5 KHz

87±2dB

AT 0.5m /1w

MEASUREMENT

5

 

FREQ RESPONSE

fo ~ 10 K Hz   -10dB

 

-10dB

6

 

RATED POWER

2.0 W  
7

 

MAX POWER

3.0 W  
8

 

OPEARTION

 

MUST BE NORMAL

PROGRAM SOURCE 2.0 W
9

 

NOISE

 

MUST BE NORMAL

SINE WAVE 4.0 V
10

 

HEAT TEST

AFTER TEST MEET ITEM 8,9 55± 2℃ 16 HOURS
11

 

HUMIDITY TEST

AFTER TEST MEET ITEM 8,9

40±2℃

90~95%RH 48 HOURS

12

 

LOAD TEST

AFTER TEST MEET ITEM 8,9 2.0 W 100 HOURS
13

 

MAGNET

Ф12.5X1.5 NdFeB

MATERIAL SIZE

 
14

 

TOTAL FLUX

MAX WELL  
15

 

POLARIZATION

When a positive DC current is applied to the terminal marked(+),diaphragm shall move forward

 
16

 

NET WEIGHT

12.8g  
       


 

Black Round Small Raw Audio Speakers 50mm Headphone Earphone Mylar Speaker 0

Black Round Small Raw Audio Speakers 50mm Headphone Earphone Mylar Speaker 1

Black Round Small Raw Audio Speakers 50mm Headphone Earphone Mylar Speaker 2

Black Round Small Raw Audio Speakers 50mm Headphone Earphone Mylar Speaker 3

 

3. Applications

  The first experimental moving-coil (also called dynamic) loudspeaker was invented by Oliver Lodge in 1898. The first practical moving-coil loudspeakers were manufactured by Danish engineer Peter L. Jensen and Edwin Pridham in 1915, in Napa, California.Like previous loudspeakers these used horns to amplify the sound produced by a small diaphragm. Jensen was denied patents. Being unsuccessful in selling their product to telephone companies, in 1915 they changed their target market to radios and public address systems, and named their product Magnavox. Jensen was, for years after the invention of the loudspeaker, a part owner of The Magnavox Company.

 
 

 The moving-coil principle commonly used today in speakers was patented in 1924 by Chester W. Rice and Edward W. Kellogg. The key difference between previous attempts and the patent by Rice and Kellogg is the adjustment of mechanical parameters so that the fundamental resonance of the moving system is below the frequency where the cone's radiation Impedance becomes uniform. About this same period, Walter H. Schottky invented the first ribbon loudspeaker together with Dr. Erwin Gerlach.

These first loudspeakers used electromagnets, because large, powerful permanent magnets were generally not available at a reasonable price. The coil of an electromagnet, called a field coil, was energized by current through a second pair of connections to the driver. This winding usually served a dual role, acting also as a choke coil, filtering the power supply of the amplifier that the loudspeaker was connected to. AC ripple in the current was attenuated by the action of passing through the choke coil. However, AC line frequencies tended to modulate the audio signal going to the voice coil and added to the audible hum. In 1930 Jensen introduced the first commercial fixed-magnet loudspeaker; however, the large, heavy iron magnets of the day were impractical and field-coil speakers remained predominant until the widespread availability of lightweight alnico magnets after World War II.

  

4. Competitive Advantage

1). Reinforced nylong housing eliminates corrosion damage

2). Wire/connector/bolt mounting optional, easy to install

3). Voltage polarity protection

4). RoHS compliant, CE certified, SGS

 

5. Information

Place of Origin: China
Brand Name: Yuesonic
Certification: CE/RoHS/SGS
Model Number: YD78-1N

 

6. Custom properties

Product Name: Speaker Application: Outdoor
Weight: 257g Sound: HIFI
Material: Metal Power: 15W
Standard: CE/ROHS/SGS Type: Line array

 

7. Product commercial terms

Minimum Order Quantity: 2000pcs
Price: negotiation
Packaging Details: T/T or western Union
Delivery Time: 3,0000pcs per month
Payment Terms: 14~28 working days after received your payment
Supply Ability: Packed in box firstly,and then reinforced with neutral packaging for outer packing

 

Contact Details
Carol Tan

Phone Number : +8613584585528

WhatsApp : +8615295188159