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In order to facilitate the majority of DIY enthusiasts, maintenance technicians, the company has launched a
series of mini digital class D amplifier board, this section for the 30W * 2 dual-channel mini amplifier small board, no need to add a heat sink, the output has short-circuit protection, the output of the board for the CMOS tube BTL drive.
No need to add a heat sink, the output has a short circuit protection, the board output for the CMOS tube BTL drive mode.
The output of the board is CMOS tube BTL drive mode.Product Features
Output short circuit protection
Miniature size, easy to install
30W dual-channel, no heatsink required ★Amplifier board power supply, connected to the speaker of the 2 pads between the DC voltage 0V, speaker pads and GND DC voltage between the power supply voltage of one and a half.
★ Select 4 ohm speakers, the power supply voltage should not exceed 16V, otherwise the chip heat is too high and easy to damage the amplifier. Select 8 ohm speakers, the power supply voltage should not exceed 24V, otherwise the voltage is too high to break the amplifier chip.
★ Speaker wiring try to control the audio line within 3 metres, the line is too long load inductance increases and produces self-induced voltage is too high to break the amplifier chip, the long line connected to the speaker is recommended to consider adding a diode (IN5819) to achieve the release of self-induced voltage to protect the chip. TIP: 36% of the inductance voltage of the amplifier is too high. TIP: 36dB gain good and bad!
Amplifier gain using 36dB benefits: because some audio equipment source signal is too weak, the 36dB amplifier to amplify the sound. 36dB amplifier amplification sound will be very big, with the market 20dB amplifier amplification sound will be very small. For example, mobile phone output audio signal is weaker than the computer audio signal, with 36dB amplifier amplification The sound will be very big if it is amplified with 36dB amplifier. If you connect the computer audio signal, with 36dB amplifier amplification sound is too big, the sound and distortion is hard to hear, you should lower the volume of the computer, if the computer is not convenient to adjust, you can use the 36dB amplifier in the computer. If the computer is not convenient to adjust, you can reduce the volume in the amplifier board input series resistance (amplifier board input resistance is 1K, the amplifier board input resistance is 1K, the amplifier board input resistance is 1K). Input resistor is 1K, the use of resistor voltage divider to change the volume of the amplifier, so that the amplifier does not appear to put the Large saturation distortion), is to amplify the sound is not distorted, not difficult to hear. Amplifier gain using 36dB bad: If the audio equipment in the mute (no sound) When there is a weak noise signal, through the 36dB amplifier will put the noise is very large, so the Some customers say why the amplifier does not play the sound have a lot of noise (because the noise are) from the input signal source, the amplifier board input audio cable disconnected inside the speaker is no a little noise). Desktop computer noise is much louder than laptop noise. It is generally recommended that customers test the use of laptop computers to provide audio sources. Package include: According to your choice.Payment: PayPal, PayPal Credit, MasterCard, Apple Pay, Google Pay...are all supported. Shipping:Please make sure your address 100% right. Return Policy:If you are not satisfied with the item,any problem,please contact with us before you give a negative response,because it doesn't help you at all.we will try our best to help you solve the problems.response:Your satisfaction is very important for us.If you are satisfied with our item or service,please give us a positive response and 5-Star DSRs rating.Contact Us:We are very glad to help you,please feel free to contact us whatever any problems.Due to high volume of daily incoming emails and time zone difference,please allow 24 hours for us to reply.About Item: For the funcitonal products in our shop,we make sure that the functions are the same as description,but the actual color and shape may looks a little different from pictures because of the technical improvement and manufacturing variance.Please be advised before you offer.
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