Description

DC 12-24 V ZK-1002MT Amplifier Board High and Bass Adjustment MINI Stereo Dual Channel Bluetooth Audio Power Amplifier Board Module

Product parameters:

Product name: 100W*2 Bluetooth audio power amplifier module with tone

Product model: ZK-1002MT

Bluetooth version: 5.0 (unobstructed, 15 meters)

Signal to noise ratio:> 90 dB

Input method: AUX + Bluetooth

Number of channels: left and right dual channels (stereo)

Power amplifier chip: domestic power amplifier chip

Adapter power supply: DC 12~24 V / 5A or more (24V battery pack is not allowed)

Adaptation speaker: 30~200 W, 4~8 Ω

Power supply voltage: 12V-----8 ohms/20W+20W, 4 ohms/35W+35W

19V-----8 ohms/35W+35W, 4 ohms/60W+60W

24V----8 ohm/50W+50W, 4 ohm/100W+100W

Protection mechanism: overheating, overcurrent, short circuit protection

Product size: 99mm*60mm*21mm

Product weight: about 122g (including packaging)

Tip: Only when the audio input is enough and the power supply voltage/current is enough, there will be enough output power! ! !

The higher the power supply voltage, the greater the output power, and the smaller the speaker impedance, the greater the output power! ! !

Please make sure that the power of the adapter power supply is greater than the actual working power of the amplifier! ! !

Question answer:

Q: How to choose a power supply?

Answer: The power supply with the board is very important. The higher the voltage, the greater the current, and the more sufficient output power. If you only have 12V 1A, you can bring 3-4 inch speakers. If you are above 19V 5A, there is no problem with 8-10 inches, and the power supply must be highly regarded. If the voltage is too low, the amplified sound will easily cause sound distortion. If the current is too small, the speaker will pull down the voltage, which will result in abnormal operation or poor sound quality.

It is recommended to use a power supply of 18V19V24V with a current above 5A. If you only have a 9V12V or 1A 2A power supply, you can also use it but the power is low. Please note that when the volume is maximized, it may be distorted and affect the sound quality.

Q: How to choose a speaker?

Answer: The commonly used speakers are generally 4-8 ohms, and the positive and negative polarities are not distinguished, and the effect is the same. If your speaker has a low power, it may be between 20W-50W. The power supply voltage is smaller to prevent the speaker from burning after the amplified sound. For example, choose a power supply below 15V. If you are a 100W -200W speaker, don't worry about the problem of speaker burnout. You can choose a 12-24V power supply. The higher the voltage you choose, the greater the sound or power that can be output. The speaker power is not easy to exceed 200W, otherwise it will affect the sound quality.

Question: Introduction to audio input mode

Answer: This audio power amplifier module has two audio input methods: one is Bluetooth input, the other is AUX input, Bluetooth mode is preferred. Bluetooth can be connected in any mode. As long as the Bluetooth connection is successful, it is in Bluetooth mode, and the Bluetooth mode supports automatic connection back. When Bluetooth is not connected, AUX plug-in is in AUX mode. It should be noted that when using AUX mode, you need to confirm that the Bluetooth connection of this module has been disconnected.

Q: How to adjust the bass and treble?

Answer: The BASS potentiometer in the middle controls the bass, right-handed bass enhancement, left-handed bass attenuation. When the potentiometer is in the middle position, the bass is neither enhanced nor attenuated.

The TREBLE potentiometer on the left controls the treble, the right-handed treble is enhanced, and the left-handed treble is attenuated. When the potentiometer is in the middle position, the treble is neither enhanced nor attenuated.

Note when adjusting the treble and bass: when the treble or bass is adjusted to the maximum by turning right, if the sound is distorted, it means that the gain of the treble or bass adjustment is too large. You need to turn the treble or bass potentiometer to the left to lower the gain or The right VOLUME volume potentiometer turns left to reduce the total volume.

Question: It's okay if the voice is small. When the voice becomes louder, the voice becomes muddy?

Answer: The sound is distorted, please change to a higher voltage adapter power supply.

Question: It’s okay if the voice is small, but when the voice becomes louder, the voice freezes?

Answer: The input power is insufficient, and the power supply itself is protected against intermittent power failure. Please replace it with a higher-power power supply; or if the power is too large, the power amplifier board heats up seriously, and thermal protection occurs. Reduce power usage or enhance heat dissipation.

Q: What factors are related to the sound quality?

Answer: The sound quality is not only related to the power amplifier module, but also related to the sound source and the entire sound system. Basically, every aspect of the audio system will affect the sound quality, among which the main links are the audio transmission line, the audio power supply, the tone circuit, the power amplifier circuit, the speakers and the surrounding environment. The sound quality is the best only when the sound source, power amplifier module and speakers are matched.

Checklist

1*Power amplifier board module