Audioguru again
- Joined Oct 21, 2019
- 6,674
The load has nothing to do with crossover distortion. The distortion is much worse at lower levels because the output transistors need +0.7V and -0.7V to turn on since they are not biased for class-AB like most other opamps and audio amplifiers.
You can eliminate the crossover distortion if you add a resistor from the output to ground or to the positive supply so that one of the two output transistors smokes when operating in class-A. but you cannot reduce its hisss and you cannot improve its lousy frequency response.
The datasheet of an LM380 shows that its input resistance is 150k ohms. An LM386 is 50k ohms.
You can eliminate the crossover distortion if you add a resistor from the output to ground or to the positive supply so that one of the two output transistors smokes when operating in class-A. but you cannot reduce its hisss and you cannot improve its lousy frequency response.
The datasheet of an LM380 shows that its input resistance is 150k ohms. An LM386 is 50k ohms.