Audio2.1 channel Bluetooth digital power amplifier board module high and low tone overweight subwoofer high power

Android phone Wuzhi Audio APP download link:

http://www.qingdaowuzhi.cn/appdownload/Wuzhi_Audio.apk

For Apple iOS phones, please search for "wuzhi audio" on the Apple App Store to download and install it.

ZK-TB21 product manual link:

http://www.qingdaowuzhi.com/DownLoad/112051.html?a=download

oneHow to choose a power source?

The power supply matched with the board is crucial,The ripple of the selected power supply must be small, as a power supply with large ripple will cause the bottom noise of the power amplifier board to increase,There is an electric current sound. The higher the voltage, the greater the current, and the greater the output power. If you only have12V 1A,This way, you can bring3-4Inch speaker. If you are19V 5AAbove, with8-10There is no problem with the size, 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.

Recommended for use18V19V24VPower supply, current5AThe above. If you only9V12Vor1A 2AThe power supply can also be used, but the power is small. When using it, selecting the volume close to the maximum may cause distortion and affect the sound quality.

twoHow to choose a speaker?

Regarding speaker types: Commonly used speakers are generally4-8Ohmic ones can be used. The speakers for the left and right channels need to be connected to full frequency speakers or mid to high frequency speakers, with a power of20W-100Wbetween. The subwoofer speaker cannot be connected to a regular speaker and needs to be connected to a speaker with a subwoofer speaker, with a power of20W-100Wbetween. The diving frequency of the subwoofer speaker should be at least50Hz.

If your speaker power is low, such as between20W-50WIt can also be used between them, but the power supply voltage needs to be lower to prevent the speaker from being burned out after being turned up loudly. For example, choose15VThe following power sources. If you are50W-100WYou don't have to worry about the horn burning out, you can choose12-24VThe higher the voltage selected for the power supply, the greater the sound or power that can be output. Speaker power is not easily exceeded100W,Otherwise, it will affect the sound quality.

threeIntroduction to Audio Input Modes

This audio amplifier module has two audio input methods: one is Bluetooth input, and the other isAUXInput, Bluetooth mode takes priority. Bluetooth can connect in any mode. As long as the Bluetooth connection is successful, it is in Bluetooth mode, and Bluetooth mode supports automatic reconnection. When Bluetooth is not connectedAUXInsertion isAUXpattern. It should be noted that the useAUXWhen in mode, it is necessary to confirm that the Bluetooth connection of this module has been disconnected.

fourHow to adjust the master volume?

MAIN—VOLUMEThe knob is used to adjust the master volume. The right-handed master volume increases, while the left-handed master volume decreases. The master volume has an impact on the volume of both the left and right channels as well as the subwoofer.

fiveHow to adjust the high and low frequencies of the left and right channels?

R&L CHANNEL—BASSThe knob controls the bass, with right-handed bass enhancement and left-handed bass attenuation. When the knob is in the rightmost position, it does not enhance or attenuate bass.

R&L CHANNEL—TREBLEThe knob controls the treble, with right-handed treble enhanced and left-handed treble attenuated. When the knob 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 knob left to reduce the gain or turn the right knob downMAIN-VOLUMETurn the knob left to decrease the overall volume.

sixHow to adjust the subwoofer?

SUBWOOFER—VOLUMEThe knob controls the volume of the subwoofer. The volume increases when turning right and decreases when turning left.

SUBWOOFER—FREQThe knob controls the cut-off frequency of the subwoofer. The right-handed frequency increases, while the left-handed frequency decreases. The frequency adjustment range is20Hz-200Hz.

sevenIs it okay if the sound is small, but when the sound becomes louder, there is a phenomenon of cloudy sound?

The sound is distorted. Please reduce the overall volume or switch to a higher voltage adapter power supply.

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

Insufficient input power supply, intermittent power-off protection of the power supply itself, please replace 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.

nineWhat factors are related to the quality of sound?

The quality of sound is not only related to the amplifier module, but also to the power supply, audio 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, power supply, amplifier module, and speaker are matched.