With only 1% distortion, this Motorola amplifier found in a 1968 documentation makes use of period components. The frequency response ranges from 10 Hz to 100 kHz.
The oscillator of this circuit operates around 8 MHz, but the output will be at a frequency three times...
This very low current circuit with the ICM7860 was found in the April 1995 Electronics Now...
This circuit was obtained from an English magazine from 1979, but can be easily assembled today...