This circuit appeared in the June 1990 issue of Radio Electronics magazine. Integrated circuits must be equipped with heatsinks. Current and voltage depend on the ICs used.
We found this circuit in a 1998 documentation. The circuit can also be used as a minutery...
The TAA131 used in this circuit is not very easy to find today, but an equivalent low power audio...
These three circuits have different treble responses. We found them in the February 1970 issue of...