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eBay Visit store Items for sale About us Product Details Features 1. Use of high-quality materials, quality is guaranteed 2. Exquisite and compact appearance, beautiful arrangement of components 3. Support Bluetooth audio reception, external audio input interface, with preamplification, bass crossover processing; bass volume, bass frequency, left and right channel volume, treble, function control switch/total volume, 5 adjustment potentiometer 4. Easy to use, wide operating voltage, power-saving design, efficiency up to 90% or more 5. Wide range of applications, can be used with good performance switching power supply, laptop switching power supply, but also can be used to recharge bottles or car power supply, etc. Specification Operating voltage range: DC12-24V (current 3-4A, or 19-24V/4-5A, such as power requirements of high 20-24V/8-9A or more) such as the use of alternating current (AC) transformer power supply, must be added to the rectifier filter into a direct current (DC) power supply can be connected. Note that the DC (DC) no-load voltage should not be greater than 25.5V (this is very important) Bluetooth reception distance: > 8 m (meters), version 5.0 Is no obstacles to block the reception distance, the phone’s own bluetooth performance, will also affect the reception distance Audio input sensitivity: 600-800mV, frequency response range: 20HZ-20KHz Speaker impedance: left and right channel: 4-8 ohms, bass channel: 2-8 ohms Frequently Asked Questions: 1, amplifier board use current sound, noise? Most of the products are powered by DC power supply, which does not produce current sound and noise mainly due to. A, with the power supply filtering is not good Current sound is the power supply or audio source input is not normal lead to B, poor quality of the input signal; the output of the device connected to the input playback is not normal noise is caused by the abnormal input of the audio source C, poor quality of the input connection line; poor line contact; wiring damage; wiring suspension 2, no sound, a channel no sound A, the speaker connection line is not through B, poor contact with the input connection line, wiring damage 3、Volume up, broken sound, broken sound A, first confirm whether the wiring is correct, whether the power supply current is sufficient B, poor performance or damage to the speaker itself, speaker power is too small or too large C, the left and right channel speaker (+) (-) output is independent, can not be connected to each other 4, the amplifier will burn out A, the positive and negative poles of the power supply is reversed; power supply voltage is too high, beyond the working limit B, the wiring should be correct, and then connected to the power supply, the wrong line will lead to a short circuit List 1 x digital amplifier board 5 x Knob Caps 1 x Cable 1 x Kit Payment Method Shipping Policy Feedback Payment Method Payment must be received in 5 business days of auction closing. Please leave note for your special request (e.g. Colors or Size) when you pay the order. Any special request cannot be accepted after 24 hours of payment, because most of orders will be processed instantly and same day dispatched. Shipping Policy 1. We only ship to the confirmed address provided by eBay. please make sure your ebay address is 100% matches the address you would like us to ship to. If not, please let us know before we sent you the package, or we will not be responsible for any loss. hope you could understand. 2. Orders will be processed instantly and dispatched within 1-3 business days except hoilday, so we do NOT accept any email/message note after you place orders. 3. All package need to wait 30 days,Please take care it.Less than 30 days,we can’t take a refund. Feedback We maintain high standards of excellence and strive for 100% customer satisfaction! Feedback is very important to us. We request that you keep in touch with us immediately BEFORE you give us neutral or negative feedback, so that we can satisfactorily address your concerns.
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