This passive loudness control was obtained in an old publication. The critical component is the tapped potentiometer that can be adapted with an external resistor network.
Other series amplifiers such as the MC3301, MC3401 and LM2900 can be used on this circuit. We...
We found this circuit in a Philips documentation from 1969. It makes use of transistors of the...
The circuit shown is from National Semiconductor's Linear Applications Handbook. The LM3900 is a...