Design 2.1 Power Amplifier Board Multi Function Power Amplifier Board 5V20W Audio Amplifier

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

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 ohm / 5W full frequency horn.
Bass speaker: choose 4 (ohm) 10W-15W bass speaker. Never use a 6-ohm or 8-ohm bass 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 ohm / 3W full frequency speakers.
Bass speaker: choose 4 (ohm) 5W bass speaker. Never use a 6-euro or 8-euro Bass speaker;
Audio source: MP3, MP4, computer, PC, mobile phone
Colour:As shown
Material:PC+Metal

Package Contents:
1 x Power Amplifier Board

Only the above package content, other products are not included.
Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.

About Us
We provide the good product with the best price,we support Wholesale/Drop Shipping Order
1. For Drop Shipping order, please remark"dropshipping order", we will prioritize it.
2. For Wholesale/Drop Shipping orders, if you have any ideas about the price or package,please contact us in advance,we will give you the best service to satisfy your demands.

About Shipments
1.We will send out the orders ASAP once your payment is completed normally.
2.Please write your complete delivery address with correct phone number and zip code, especially please confirm your full name.

About After-sale Service
We are reliable seller and we have our professional after-sale service for all of our customs. If there is any question about the order,please contact us in advance ,we will always here until you get a happy answer.

About Feedback
1. Please check the package and item when you get carefully to make sure there is no problem.
2. If you have any problem or are not entirely satisfied with your package,please don’t be hesitate to contact us first before leaving negative feedback. We will resolve the problem to satisfy you.
44208. If there is no problem, please leave us five star positive feedback.
Your affirmation is our greatest motivation ! !