In a Class A amp the output devices do not go into cutoff within the amp's linear region. Sure, you have the amp biased heavily, but that does not affect output voltage.
Many people are surprised to find out that the bias point does not affect the output power (that is a function of the power supply- class AB amps usually have a higher Vcc or B+ than class A amps do so you don't roast the output devices with too much dissipation). Bias affect the *distortion* of the amplifier- class A allows a push-pull amplifier to cancel harmonics at any point in its operating region. In the case of a single-ended circuit, it puts the operation at the most linear portion of the output device's curve.
Many people are surprised to find out that the bias point does not affect the output power (that is a function of the power supply- class AB amps usually have a higher Vcc or B+ than class A amps do so you don't roast the output devices with too much dissipation). Bias affect the *distortion* of the amplifier- class A allows a push-pull amplifier to cancel harmonics at any point in its operating region. In the case of a single-ended circuit, it puts the operation at the most linear portion of the output device's curve.