SPECIFICATIONS

Brand Name: other

Built-in Battery: No

Choice: yes

High-concerned chemical: None

Input Type: Bluetooth

Output Type: LINE OUT (AUDIO OUT)

Recommended Headphone Maximum Impedance: < 32 Ohm

Answer to the question:

Question: How to choose a power source?

Answer: The power supply matched with the board is crucial. The higher the voltage, the greater the current, and the greater the output power. If you only have 12V1A, you can bring a 3-4 inch speaker. If you are above 19V 5A, there is no problem with 8-10 inches, and the power supply must be highly valued. If the voltage is too low, sound amplification can easily cause sound distortion. If the current is too small to raise the speaker, the voltage will be lowered, causing abnormal operation or poor sound quality. Recommend using a 18V19V24V power supply with a current of 5A or higher. If you only have a 9V12V or 1A2A power supply, it can also be used, but the power is small. Please note that when using it, turning the volume to the maximum may cause distortion and affect the sound quality.

Question: How to choose a speaker?

Answer: The commonly used speakers are usually 4-8 ohms, and the positive and negative polarities can be ignored, resulting in the same effect. If your speaker power is low, it may be between 20-50W, which can also be used. The power supply voltage should be lower to prevent the speaker from burning out after loud noise, such as choosing a power supply below 15V. If you have a 100WV-200W speaker, you don't have to worry about the speaker burning out. You can choose a power supply of 12-24V. The higher the voltage you choose, the greater the sound or power that can be output. The speaker power should not exceed 200W, otherwise it will affect the sound quality.

Q: How to adjust high and low frequencies?

Answer: The BASS potentiometer in the middle controls the bass, with right-handed bass enhancement and left-handed bass attenuation. When the potentiometer is in the middle position, it does not enhance or attenuate bass

The TREBLE potentiometer on the left controls the treble, with right-handed treble enhanced and left-handed treble attenuated. When the potentiometer is in the middle position, it does not enhance or attenuate high notes

Attention should be paid when adjusting high and low frequencies: When the high or low frequency is adjusted to the right close to the maximum, if the sound is distorted, it means that the gain of the high or low frequency adjustment is too large. It is necessary to turn the high or low frequency potentiometer to the left to reduce the gain or turn the VOLUME volume potentiometer on the right to the left to reduce the total volume.

Q: What factors are related to the quality of sound?

Answer: The quality of sound is not only related to the amplifier module, but also to the sound source and the entire audio system. Basically, every aspect of the audio system affects sound quality, including audio transmission lines, audio power supply, tone circuits, amplifier circuits, speakers, and surrounding environment. The best sound quality is achieved only when the audio source, amplifier module, and speaker are matched.

Q: It's okay if the sound is small, but when the sound becomes louder, does it become cloudy?

Answer: The sound is distorted, please replace it with a higher voltage level adapter power supply.

Q: It's okay if the sound is small, but when the sound becomes louder, there may be a stuttering phenomenon?

Answer: The input power supply is insufficient, and the power supply itself has intermittent power-off protection. Please replace it with a higher power supply; Or if the power is too high and the amplifier board heats up severely, there may be a situation of thermal protection. Reduce power usage or strengthen heat dissipation.