100W*2 Bluetooth 5.0 Amplifier Board 2 CH Stereo Amp Treble Bass ZK-1002T Kit

Description: Description 100W*2 Bluetooth 5.0 Amplifier Board 2 Channel Stereo Amplifier Treble Bass ZK-1002T Unassembled Package Included: - 1 x Set of Bluetooth Power Amplifier Note: Assembling is needed. Q&A: 1. How to choose a power supply? The power supply with the board is critical. The higher the voltage, the higher the current and the better the output power. If you only have 12V 1A, you can bring a 3-4 inch speaker. If you are 19V 5A or above, there is no problem with 8-10 inches, and the power supply must be highly valued. If the voltage is too low, the sound will be distorted after the sound is amplified. If the current is too small, the speaker will pull the voltage low, work abnormally or the sound quality will deteriorate. It is recommended to use 18V 19V 24V power supply with current above 5A. If you only have 9V 12V or 1A 2A power supply, it can also be used but the power is small. Please pay attention to the maximum volume when using it, which may affect the sound quality. 2. 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 20W-50W. 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 using a 100W-200W 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 200W, otherwise the sound quality will be affected. 3. 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, it is bluetooth mode, and bluetooth mode support automatic connection. AUX insertion is AUX mode when bluetooth is connection-less. It is important to make sure that the bluetooth connection of this module has been disconnected when using AUX mode. 4. 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. 5. When the sound becomes louder, the phenomenon of turbid sound appears. The sound is distorted. Please change the adapter power supply with a higher voltage rating. 6. After the sound becomes louder, the sound is stuck. The input power is insufficient, and the power supply itself is intermittently powered off. Please replace the power supply with a larger power. Or the output power is too large, the power amplifier board is seriously heated, and thermal protection occurs, reducing power usage or enhancing heat dissipation. 7. What are the factors related to the sound quality? Sound quality is not only related to the amplifier module, but also to the sound source and the entire sound system.Basically every link of the sound system will affect the sound quality, among which the main link is the audio transmission line, audio power supply, tone circuit, amplifier circuit, speaker and the surrounding environment. Sound quality is best only when the sound source, amplifier module and speaker are matched. Payment Terms 1.We accept PayPal only. 2.All major credit cards are accepted through secure payment processor PayPal. 3.Payment must be received within 7 business days of auction closing. 4.We ship to your eBay or Paypal address. Please make sure your eBay and Paypal address is correct before you pay. Shipping Terms - For remote regions, we will charge your extra shipping costs. Usually it cost about 35USD-50USD. We will contact you after your payment. Thanks for your understanding. Return Terms 1. If you receive defective item, please kindly notify us within 14 days. We will guide you the returning instruction for replacement or refund. 2. If you purchased in improper condition, please NOTE that the sipping and handling fee will not be refund, all return shipping fee should paid by the buyer unless item DOA. 3. We reserve the right to refuse any returns for objective reasons. Custom Duties & Taxes 1. Import duties, taxes, and charges are not included in the item price or postage cost. These charges are the buyer's responsibility. 2. Avoiding some unnecessary trouble, please check with your country's customs office to inform us what we should declare its value before shipping. Feedback 1. If you are dissatisfied for any reason, please don't be quick to leave us neutral or negative feedback. We work hard to make sure EVERY CUSTOMER 100% SATISFIED and resolve any problem for you and always leave positive feedback to all our customers. 2. If you are satisfied with the product you received, please kindly leave us a positive feedback and 5 star DSR. If there is any problem of your order, please feel free to contact us firstly, we are responsible and credible seller, will follow it for you asap. On Jun-10-20 at 02:31:07 PDT, seller added the following information:

Price: 18.98 USD

Location: Shenzhen

End Time: 2024-08-19T09:17:19.000Z

Shipping Cost: 3 USD