UPC1237 Speaker Horn DC Protection Switch Board Amplifier Board

This speaker protection with power-on delay and DC protection, the board uses UPC1237 speaker protection special chip, simple circuit, easy to produce, safe and reliable. High-quality 5 Huike relay, suitable for most of the amplifier board, and can be used with this site speaker seat, directly mounted on the chassis, space saving. Working voltage AC 12-15V, independent power supply is recommended. The size of the installed (excluding the speaker for the foot 20mm speaker seat, two speaker seat): 69mm long x 36mm wide x 25mm high seat spacing 25mm.
Board resistors for the metal film precision 1% copper foot resistors, capacitors for the Ruby Rubycon long life capacitors This board uses 1.6 mm black double-sided design, 2.0 ounces of copper thickness, spray tin full process, to ensure that the size of the current through the performance of a good.

Translated with DeepL.com (free version)

Cautions
Can only be used for dual-channel common ground amplifier board, if the dual power supply BTL circuit requires two sets (single power supply BTL circuit can not be used)
The protection board can be directly fixed on the speaker terminal of the chassis to save space.
If it is not directly mounted on the chassis, it can be connected to the speaker terminals by means of leads.
Product Description
In the amplifier, the speaker protection is the last link in the output circuit, although it is not the main character, but it is also very important to protect your beloved speakers, reliable performance is the most basic requirement.
This board adopts a simple and practical design, with power-on delay, shutdown quick disconnect, output DC voltage detection and protection functions. Suitable for stereo amplifiers.

Translated with DeepL.com (free version)