$14.69 Buy It Now or Best Offer
free,30-Day Returns
Seller Store diybox
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Location: Monroe Township, New Jersey
Ships to: US,
Item: 116376174583
Restocking Fee:No
Return shipping will be paid by:Seller
All returns accepted:Returns Accepted
Item must be returned within:30 Days
Refund will be given as:Money Back
Unbranded:Unbranded
Type:Digital Amplifier
ZK-502MT:ZK-502MT
UPC:Does not apply
EAN:Does not apply
Marke:Markenlos
Modell:ZK-502MT
Produktart:Audio Amplifier
ZK-502MT 50W*2 AUX Bluetooth 5.0 Audio Amplifier Board Module Tone Adjustable USProduct Features:Independent high and bass adjustment, dual channel stereo outputBluetooth 5.0 input, unobstructed 15 metersWith protection mechanism, overheat, overcurrent, short circuit protection function50W * 2 with tone Bluetooth audio amplifier module, small distortion, wide range of adjustmentWide range of application, suitable for cell phones, tablets, laptops, etc. Product parameters:Product Model:ZK-502MTBluetooth version: 5.0 (unobstructed, 15 meters)Signal to noise ratio: >90 dBInput mode: AUX + BluetoothPower amplifier chip: domestic power amplifier chipNumber of channels: left and right dual channel (stereo)Adaptable speakers: 15 ~ 100W, 4 ~ 8ΩAdaptable power supply: DC 9 ~ 24V/3A or more (can not be connected to 24V battery pack)Protection mechanism: overheating, overcurrent, short-circuit protectionPower supply voltage:12V —–8Ω/12W+12W, 4Ω/20W+20W15V —–8Ω/18W+18W, 4Ω/30W+30W19V—–8Ω/30W+30W, 4Ω/40W+40W24V—-8Ω/40W+40W,4Ω/50W+50WProduct size:89mm*60mm*21mmTips.1. In the case of sufficient audio input, the power supply voltage/current is sufficient to have sufficient output power!2. The higher the power supply voltage, the higher the output power, the smaller the speaker impedance, the higher the output power!3. Please ensure that the power of the adaptable power supply is greater than the actual working power of the amplifier! Product list:1* Amplifier module1* Shell1* Accessories Questions answered.1. How to choose the power supply?The board with the power supply is very critical. The higher the voltage, the higher the current, the more output power, if you only 12V1A, so you can take 3-4 inch speakers. If you are more than 19V 5A, with 8-10 inch no problem, the power supply must pay great attention. If the voltage is too low sound amplification is easy to cause sound distortion, if the current is too small to bring up the speaker will pull the voltage down, not working properly or poor sound quality.Recommend the use of 18V19V24V power supply, the current of more than 5A. If you only have 9V12V or 1A2A power supply, you can also use but the power is small, pay attention to the use of the volume to the maximum may be distorted, affecting the sound quality.2. How to choose the speaker?Commonly used speakers are generally 4-8 ohms, can not distinguish between positive and negative polarity, the effect is the same. If your speaker power is small, may be between 20-50W can also be used, the supply voltage is small to prevent loud burn speaker, such as the choice of 15V power supply below. If you are 100W -200W speakers, do not worry about the problem of speaker burn, you can choose 12-24V power supply, the higher the selected voltage, then the greater the output sound or power. Speaker power is not easy to exceed 200W, otherwise it will affect the sound quality.3. How to adjust the high and low tones?The BASS potentiometer in the middle is to control the bass, right rotation bass enhancement, left rotation bass attenuation. When the potentiometer is in the middle position, the bass is not enhanced nor attenuated;The left TREBLE potentiometer is to control the treble, right-turn treble enhancement, left-turn treble attenuation. When the potentiometer is in the middle position, the treble is not enhanced nor attenuatedHigh-bass adjustment need to pay attention to: when the treble or bass right rotation adjustment to close to the maximum if the sound distortion, that the treble or bass adjustment gain is too large, you need to treble or bass potentiometer left rotation, the gain down or the right VOLUME volume potentiometer left rotation, so that the total volume is reduced.4. What factors are related to the quality of sound?The sound quality is not only related to the amplifier module, but also with the sound source and the entire audio system. Basically, each link of the audio system will affect the sound quality, the main links are audio transmission lines, audio power, tone circuits, amplifier circuits, speakers and the surrounding environment. Only when the audio source, amplifier module and speakers match, the sound quality is the best.5. Small sound is fine, the sound becomes larger, the phenomenon of muddy sound?Sound distortion, please change the voltage level higher adapter power supply.6. small sound is fine, the sound becomes louder, the phenomenon of sound stuttering?Input power supply power shortage, the power supply itself intermittent power failure protection, please replace the power supply with a higher power; or too much power, the amplifier board heat serious, thermal protection, reduce the power to use or strengthen the heat dissipation. ShippingFeedbackContact usReturn PolicyShipping Domestic We believe you need to get your purchases as quick as possible. As a general rule your item will be shipped within 24 hours of you purchasing it. We pack and post from Tuesday to Sunday (Mondays we are closed) but definitely get all our mail off to the post office first thing Monday morning for you. Mail gets picked up at 12pm so chances are if you buy before lunchtime your item will leave the same day. International Same as above but understand that depending on what part of the world you are from it does take a little longer to send, delivery can be from 7-15 working days. Also other factors to take into consideration are quarantine and customs regulations in your country. It is also a consideration that customs duties and GST/VAT may be payable at the buyers expense. Combined Postage (for items with shipping charges): We are more than happy to combine postage, just use the Buy it Now function in eBay (but DO NOT PAY after purchasing each item) to buy all the products you need, when you have finished request a combined invoice, we will base the shipping cost on the size, weight and your location.Feedback * When you satisfied with our product and services please leave us positive feedback. * If you have got the package, please confirm « Delivery on time » For us. * If a problem occurs, contact us immediately with any email request. * Just contact us using the » Ask the seller a question » link on eBay. Your Satisfaction is our Priority. Our goal is to make all our customers as happy as possible while shopping with us. Contact us For anything problem about product, price, shipping or order status, pleasecontact us via eBay message.Just contact us using the » Ask the seller a question » link on eBay. We expect positive feedback and 5 scores DSR from you. Return Policy We believe our items are so outstanding. We are convinced you will be happy with your Purchase. If you do not satisfy with our items. Please simply return to us within 30 Days in original condition. Just pay for the returned postage. Then we can issue full refund to you after the returned item arrived at our warehouse. Please include your eBay ID and item number with any email requests.
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