Bảng Mạch Khuếch Đại Âm Thanh Bluetooth Mini Zk-502Mt 2x50w

"(ZK-502MT/ZK-502T Bluetooth Audio Amplifier)
Question and answer:
-How to choose a speaker?
Commonly used speakers are generally 4 ohms or 8 ohms, can not distinguish between positive and negative, the effect is the same.If your speaker power is small, it may be used between 10W-30W. The power supply voltage is small to prevent the amplifier from burning out after burning. For example, select a power supply below 15V.
If you are a 50W-100w speaker, don't worry about the speaker burnout. You can choose 12-24V power supply. The higher the voltage you choose, the louder the output sound or power.The speaker power is not recommended to exceed 100W, otherwise the sound quality will be affected.

-Introduction of audio input mode
This audio amplifier module has two audio input modes: one is bluetooth input and the other is AUX input. Bluetooth mode is preferred.Bluetooth can be connected in either mode.As long as the bluetooth connection is successful is bluetooth mode, and bluetooth mode support automatic connection.AUX insertion is AUX mode when bluetooth is connectionless.It is important to make sure that the bluetooth connection of this module has been disconnected when using AUX mode.

-How to adjust the bass and high pitch?
The BASS potentiometer in the middle is to control the BASS, the right BASS is enhanced, the left BASS is attenuated.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 TREBLE enhanced and the left TREBLE attenuated.When the potentiometer is in the middle position, it does not increase or decrease the treble.
Note when adjusting treble and bass: when the treble or bass right rotation is adjusted to the maximum, if the sound is distorted, it means that the treble or bass gain is too large. It is necessary to turn the treble or bass potentiometer to the left to reduce the gain or turn the VOLUME potentiometer to the left to reduce the total volume.

(DY-AP3001 Power Amplifier)
Features:
10W/20W/30W Class-D audio power amplifier module Wide supply voltage range 12V/24V DY-AP3001

NOTE:
1、8~24VDC is recommended; upper than 26V, it will be damaged.
-Driving 4Ω load, power supply must be under 16V; and driving 8Ω load, supply must be under 24V.
-The supply current must be 2A at least.
-Inverting power supply is not permitted, or the chip will be damaged.
-The module is designed for audio signal range 0.5V~1.5V.
-The line connecting speaker with module should be within one meter.
-ESD protection , please release ESD on your hands before you contact the module.
8、30W and upper power speaker is recommen