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Planar magnetic transducer is commonly known as planar diaphragm unit (also known as field pole type) or quasi ribbon unit. If the horn is made of this unit, it is called planar diaphragm horn. As early as 1920's, the planar diaphragm horn was developed simultaneously with the moving coil unit. However, due to technical limitations, it was not commercialized until after 1970's. The planar diaphragm unit is driven by magnetic force just like the moving coil unit, but its voice coil is not rolled into a circle like the moving coil unit, but scattered evenly on a planar diaphragm. The flat diaphragm unit can be used as a treble unit, a midrange unit, or a bass unit.

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horn_PB-10A

ELECTRO-ACOUSTICAL CHARACTERISTICS

Sensitivity：

94±2 dB（0.179V f=1kHz）
DC Resistance：

18±3Ω
Rated Power：

5 mW
Max Power：

10 mW
Frequency response：

20Hz -20KHz
Max Distortion：

1%（0.179V f=1kHz）
Buzz and Rattle test：

Sine wave 0.3 V at 50 Hz to 5K Hz
Frequency response characteristics

Typical frequency response
Frequency sweep test of total harmonic distortion (THD)

Total harmonic distortion frequency sweep test (0.179V 20-20kHz)