Amplifier Board - AIYIMA B2D1121

Audio Amplifiers
$32.99 $19.99

Note: The protection board requires independent winding group power supply and cannot share the power supply with the amplifier circuit!


If you have a Class A amplifier or a high-power Class A amplifier, or BTL amplifier, you need to use a high-current speaker protection board, the shop recommend a 30A 2.0-channel speaker protection board, BTL power amplifier need to two pieces. PCB double-sided tin plating 1.6 Mm, speaker protection chip UPC1237, 7812 regulator, audio connection with 7.02 terminal, high-power horn protection board, the use of fully sealed high current pine music relay, can control the DC voltage 1500V, over current 30AX2.

Horn protection board has a power-on delay (about 3 seconds) and DC protection (starting voltage of about 1V)
Function, board circuit is simple, wiring is easy, work is safe and reliable. With LED work light indication, when the protection is extinguished, light up when working normally. Use 30A high current relay, suitable for high power amplifier.


Size: 84mm*55mm.
Power supply: AC 12V-16V range
Withstand current: maximum 30A
Chip: speaker protection IC UPC1237 integrated block, Songle relay.

Packaging Including:

1 x UPC1237 speaker protection board

All items in store may take 2 to 5 business days to process.  Please add processing time to your shipping estimate below.

Here is an estimate of the shipping times.  Due to factors that often affect international shipments, such as holidays, customs, and weather delays, we can only offer an estimate of shipping times. 


Estimated Shipping Time

United States

10-30 business days

Canada, Europe

15-40 business days

Australia, New Zealand

15-45 business days

Mexico, Central America, South America

20-60 business days 

Middle East (UAE, Saudi Arabia)

20-40 business days


IMPORTANT: We are not responsible if a package is undeliverable because of missing, incomplete, or incorrect destination information. Please enter the correct shipping details when checking out. If you realize you have made an error, simply e-mail us at as soon as possible. However there is a 72-hour wait list for email, therefore, if your order has left our warehouse within 72 hours, it is out of our control.
Aiyima is not responsible for destination country tax and/or any duty charge that may incur. Customers will be held accountable for any restrictions, duties, taxes, and any other fees collected from the destination country.
Aiyima will not be responsible for any Duties, Taxes, or Customs fees under any circumstances.
If the order arrives in your country and...
• The customer refuses to accept the package
• The number of attempts is made in the country of destination to deliver the package.
Aiyima reserves the right to abandon the package(s) and will not be responsible for any refund.

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Amplifier Board - AIYIMA B2D1121
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