220nF in series with 1 ohm has half the power (7W) at 727kHz, it has 1.7W at 364kHz, it has 0.4W at 182kHz, it has 0.1W at 91kHz, and it has almost no power at audio frequencies. It simply helps to prevent oscillation at very high frequencies. Use a 1/2W resistor.Whats a safe power rating for R4? Granted 14w of power output to load.
No, the other capacitor values prevent the amplifier from producing extremely low frequencies unless their values are also ridiculously huge.Leaving in the 2.2uF cap for low frequency would increase its bandwidth and increase 2-40hz amplification. Its correct those sub 20hz signals are inaudible but they can surely be sensed.
That is why most high quality audio amplifiers use a dual polarity supply then the output capacitor is not needed.Which capacitors makes the largest overall difference in sound quality?
The 2200uF capacitor would have to be large to be film if it makes an impact on quality.
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