The second generation of the acoustics protection module. It differs from the first in-flight stabilized power supply on the board, which significantly expands the connectivity of this device. Now you don't need to look for a suitable, constant voltage in the existing amplifier circuit or build another power supply for the protection module. It is enough to connect this device to the secondary winding of a transformer with alternating voltage from 10 to 25V or directly to the power supply of the amplifier, if the constant voltage corresponds to 12 to 35V!
Stereo acoustic protection unit
The module is built on a specialized chip and provides protection of acoustics in cases:
1. Transients when the amplifier is turned on
2. Failure of the amplifier and as a consequence of the appearance of DC voltage at its failure.

The principle of operation of the device is based on opening of a circuit between the amplifier and acoustics by means of the relay. When the power is turned on, the relay contacts are open and the transients, accompanied by clicks and claps, take place without the participation of acoustics. After 2-3 seconds, the relay turns on the circuit between the amplifier and the speakers. In the event of a failure of the amplifier, and as a consequence, the occurrence of dangerous to the speaker DC voltage relay disconnects this circuit. The device uses high-quality original OMRON relay
The module has an LED, the glow of which signals the connection of the speakers to the audio amplifier.
Supply voltage DC 12 ... 35V / AC 10 ... 25V
The device provides protection of acoustics in amplifiers up to 200W