These are Tone control circuit using op amp - NE5532 or 4558 IC as low noise, with PCB layout, can adjust sound frequency and tone bass, treble, mid and..
You have a good power amplifier and speaker. You are listening to music. But the sound is very light. The problem has many reasons. One reason for the problem is…
Here is Class A amplifier circuit. It have good sound Distortion-free. First use main are transistors only. Second: 5W output use IC-low noise IC,MJ2955 power transistors [...]