This filter, with a cut-off frequency of approximately 1 kHz, has a high Q and employs two operational ones. The power supply must be symmetrical.
This circuit provides a power per channel between 6 and 10 W depending on the load. The circuit is from...
For an 8 ohm load, this Motorola circuit was found in a 1968 documentation. The transistors are of the time...
This circuit was obtained from a 1990 English magazine. The circuit can be assembled with MOSFETs of...