This midrange filter for sound systems was found in the May 1988 issue of Radio Electronics magazine. The circuit is based on a dual amplifier that must be powered by a symmetrical source.
This is a typical common collector amplifier step configuration. The transistor can be used...
We find this circuit in an old American documentation. It can provide a 25 dB compression in a...
This circuit can be used with the CB4296E receiver or others described on this site. The circuit...