We found this circuit that protects speakers against current surges that occur when the amplifier is turned on in a Radio Electronics from August 1991.
This circuit is from a 1975 documentation, but it can be implemented with more modern transistors like...
This full wave control with SCRs uses a different solution to avoid using a diode bridge: a pulse...
We found this circuit in an American publication from the 90s. The power must be 2 V more than the...