Card speakers generally refers to the current market support or can read SD, TF, etc. These memory processor speakers, with the traditional computer speakers, cell phone speakers, card speakers unique decoding function, making it more favored by consumers, because of this, it was becoming audio decoding king of empire.
At present, many speakers brand has production card box, card box, except for a portable speaker many multimedia 2 now.
1 amp also has the function of reading card.
plug-in audio is a circuit board, MP3 decoding, horn, battery power and other parts have been assembled, can directly support play SD card U disk inside the TF card memory CARDS such as MP3 format music, and with the function of FM radio, AUX input to the computer, mobile phone, CD, tablets, laptops and play music, headphones, audio output, built-in battery power can enjoy music anytime and anywhere, bass diaphragm make sound with strong expressive force.
card speaker is mainly composed of the speaker, cavity, power amplifier of three parts.
Speaker speakers (
In card speaker equipment is one of the most weak, for card speaker effect, it is one of the most important parts.
Card speaker speaker of electrodynamic loudspeaker, it USES voice coil and diaphragm between constant magnetic field force vibration and sound, is characterized by fast response speed, small distortion, replay the sound quality is exquisite, administrative levels feels good.
cavity body cavity is used to eliminate the speaker unit of short circuit, inhibit its acoustic resonance, broaden the scope of its frequency response, reduce the distortion.
The purpose of the card speakers exist cavity -
Mainly in order to prevent the speaker diaphragm pros and cons of acoustic signal directly form a loop, cause only wavelength small high intermediate frequency sound can spread out, and other sound signals are superimposed offset.
power amplifier power amplifier is mainly composed of inductor, passive components such as resistors, capacitors filter network, the spectrum of audio signals respectively to the corresponding frequencies of the speaker in the replay.
Characterized by low cost, simple structure, suitable for amateur, but insertion loss, low efficiency, poor transient characteristics.
function 1, play MP3 format U disk or memory CARDS directly, such as 2, the freedom to choose songs, radio frequency, without complex single hop song, IN table 3, a variety of charging function 4, AUX IN an external audio source input 5, with the function of FM radio, automatically search platform/storage platform 6, high efficiency of digital power amplifier chip 7, fully support hot plug, convenient to use the 8, USB sound card function (
AUX principle is the same, but the sound quality is better, independent amplifier circuit)
10 9, good amplifier effect, pocket light volume design, convenient for outdoor sports