why is class A audio amp saturating?

[SiliconWizard]

I made the circuirt you see in the attrachment and I'm using a small radio as input, however for some reason the output is saturated on the positive side of the wave and can't figure out why

As it is, the speaker will see a constant DC offset voltage. Never do that. Not only will it hinder the speaker's performance a lot, but it will also draw an enormous and unnecessary power, and could eventually destroy the speaker, make the coil overheat (and maybe make the insulator melt), or at least warp the speaker cone. A series capacitor would be required here (with high enough capacitance because it will form an high-pass filter with the speaker itself).

[Audioguru again]

The output transistor will not play the signal if the speaker has a capacitor in series with it. When power is applied the speaker will make one POP sound as the capacitor charges then nothing after it.

[Zero999]

The output transistor will not play the signal if the speaker has a capacitor in series with it. When power is applied the speaker will make one POP sound as the capacitor charges then nothing after it.

I think the idea is to add a pull-down resistor before the capacitor. The problem with that is it it either: limits the voltage swing, if it's too higher value or burns a lot of power ,if it's low enough to ensure a large voltage swing. Using a current sink, as I mentioned previously overcomes this problem, but requires another transistor which could be better used converting the amplifier to class AB.

[fourfathom]

The output transistor will not play the signal if the speaker has a capacitor in series with it. When power is applied the speaker will make one POP sound as the capacitor charges then nothing after it.

I think the idea is to add a pull-down resistor before the capacitor. The problem with that is it it either: limits the voltage swing, if it's too higher value or burns a lot of power ,if it's low enough to ensure a large voltage swing. Using a current sink, as I mentioned previously overcomes this problem, but requires another transistor which could be better used converting the amplifier to class AB.
(Attachment Link)

The current sink still has to continuously sink sufficient current to pull the speaker negative, so it's only somewhat better than the resistor when you are trying for a large output swing.

[magic]

CCS is significantly more efficient.
Do the math: how much current it takes to drive 8Ω load within 1V of supply rail, what resistance is needed for that, how much current will it waste when idle.

[Zero999]

CCS is significantly more efficient.
Do the math: how much current it takes to drive 8Ω load within 1V of supply rail, what resistance is needed for that, how much current will it waste when idle.

Yes, a constant current sink is much more efficient. To swing within a half a volt of the negative rail with a resistor, would require such a low value, the quiescent power draw would be enormous. I alluded to this in a previous post.
https://www.eevblog.com/forum/beginners/why-is-class-a-audio-amp-is-saturating/msg2618517/#msg2618517

[fourfathom]

OK, I agree.  I said "only somewhat", but you're right, the CC source is "much more" efficient.