Payment & Shipping Terms:
|Other Name:||Raw Speaker Drivers||Output S.P.L.:||90±3dB|
|Rated Impedance:||8ohm±15%||Resonance Freq:||0.2~20KHz|
50mm foam cone internal magnetic speaker driver for sound box 8Ω 0.5W
Speakers come in all shapes and sizes, enabling you to listen to music on your iPod, enjoy a film at the cinema or hear a friend’s voice over the phone.
In order to translate an electrical signal into an audible sound, speakers contain an electromagnet: a metal coil which creates a magnetic field when an electric current flows through it. This coil behaves much like a normal (permanent) magnet, with one particularly handy property: reversing the direction of the current in the coil flips the poles of the magnet.
Inside a speaker, an electromagnet is placed in front of a permanent magnet. The permanent magnet is fixed firmly into position whereas the electromagnet is mobile. As pulses of electricity pass through the coil of the electromagnet, the direction of its magnetic field is rapidly changed. This means that it is in turn attracted to and repelled from the permanent magnet, vibrating back and forth.
The electromagnet is attached to a cone made of a flexible material such as paper or plastic which amplifies these vibrations, pumping sound waves into the surrounding air and towards your ears.
|Rated Impedance||8Ω±15%||At 1kHz 1.0V|
|Resonance Freq.||0.2~20KHz||Without baffle|
|Output S.P.L.||90±3dB||At 600, 800, 1K, 1.2K|
|Response||FO.4000 Hz +/- 10dB||Output S.P.L. +/- 10dB|
|Input Power||Nominal Power: 0.25W||Maximum Input 0.5w|
|Buzzers & Rattles||Must be normal||Sin Wave 3.53V|
|Load test||Must be normal||0.25W 100hours White Noise|
|Heat test||Must be normal||Keep 96 hours at 60+/- 2℃ 20-25% R.H. then removal back to normal temperature for 1 hour|
|Humidity test||Must be normal||40℃+/-2℃ 90-95% R.H. 18hr|
|Cold test||Must be normal||-20℃+/-2℃ 90-95% R.H. 48hr|
|Distortion||<10% Maximum||Related Power Input 1000 Hz|
|Voice coil size||Ø18|