Selling Design 2.1 Power Amplifier Board Multi Function

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Note: The module model number is ; Different batches have different numbers

About ba:

The subwoofer must be matched well, and then installed into the box to make the phase inversion hole. Other parts shall be well sealed. Pay more attention to the speaker impedance, mouth meridian and height. If the impedance and mouth meridian are not consistent with its note stroke, it will not be enough. Not only the sound is small, but also there is no shaking of the subwoofer

The same board is compared with the following two speakers, both of which are 4 Euro: the sound on the left is also 4 euro, which is not only very small, but also very poor sound quality; The one on the right performs very well in all aspect

This product can drive 5V / 20W (W), based on the principle of circuit, the secondary development and proceing, the maximum power can be configured to 20W [10W ba + 10W sub box (5W * 2)]; so the power amplifier board has strict requirements for power supply and horn,

Selection requirements:

Power requirements: DC Voltage 5V (4.8-5v), current more than 3A; (power line should also be able to pa such a large current; some power lines have such a large current, but the wire can not pa such a large current; secondly, mobile power should use the originaenuine manufacturers, and ensure the discharge capacity to meet the standard (because this kind of product is lithium battery through the way of boosting), Shanzhai not only can't keep up with the current, but also can't keep up with the constant current. In particular, its instantaneous current can't keep up with it (it can't drive or distort the sound) and it's easy to damage the board. Pay attention!!

Power supply mode and horn selection

A. 5V / 3A power is inserted into the red power socket;

Horn requirements:

Left and right channel sub box horn: 4 Ω / 5W full frequency horn.

Ba speaker: choose 4 (Ω) 10W-15W ba speaker. Never use a 6-or 8-ba speaker;

B. if the power is supplied from the USB socket of the motherboard (5v3a), the USB here can't be charged, please note;

Horn requirements:

Left and right channel speakers: 4 Ω / 3W full frequency speakers.

Ba speaker: choose 4 (Ω) 5W ba speaker. Never use a 6-euro or 8-euro Ba speaker;

Audio source: MP3, MP4, computer, PC, mobile phone

About shipping
Shipping and Packaging All it will be double checked and well packed before sending.It will be dispatched within 2 business days ar buyers pay for the order. It usually takes about 14 to 18 working days for delivering the package to the destination(for remote areas,it may take a little longer). 

Special Announcement:
Please fill in the correct and detailed consignee, address and phone number in the order. For fast and correct delivery.If you do not receive order within 30 working days,please feel free to contact Customer Service before leaving Negative and Neutral Feedback, we will do our best to help you resolve the problem.TaxNo, you will only pay what is quoted as total cost at checkout, no more. You are not expected to pay any additional duties ores. If you are asked by Customs or our logistic partner to pay duties, please contact our Customer Service .

Your 100% satisfaction is very ant to us
If the product is not on good condition, You can return this product within 14 working days, please contact customer service center before returning.FeedbackYour satisfaction is our first priorityIf you receive the order and it is in good condition,we would be grateful if you would leave us 5 star Positive Feedback for the transaction.