The speaker has a pop sound

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#23
Mark Tillotson said:
100nF is plenty
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I tried adding 100nF and 10 Ohm resistors, but it still doesn't solve the problem.
Mark Tillotson said:
The inductor (air-cored, several µH) is to avoid the amp seeing an overly capacitive load from long cables, which can oscillate the GNFB loop by adding more phase shift. This is not needed if there is no global feedback loop.
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I later removed it.
 
#27
MrAK87 said:
R u trying to boost wattage from lm1875 by adding another output transistor, if yes then shearch for propper schematic , don't play with this beautiful ic otherwise that gonna fry 😉 search , search, search until u get the proper one or two some expert, who makes amp like this, circuit is basic opamp direct coupled amp but I thing there will be more circuitry
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I am a student, I want to use the AB class to eliminate the problem of crossover distortion, I have tried physical wiring, there is no burning problem, I want to try to design a circuit by myself.
If there is something wrong with the design, please let me know, thank you very much.
 
#31
Here is my circuit diagram.
All functions are normal.
 

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#35
When I first made an amp , used only resistor like you to the base of the transistor, amp was working but the problem with constant current solution, capasitor charge or backup the current feed during input voltage swing, and it's works, without that bootstrap cap distorted sound, and clicking sound happens, or u can ad any other current source,
 
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