Single-ended amplifiers use a single pair of power tubes to amplify the audio signal, while push-pull amplifiers use two pairs of power tubes that operate in opposition of phase.

Single-ended amplifier

In a single-ended amplifier, a single power tube amplifies the audio signal. The audio signal is applied to the grid of the power tube, and the tube amplifies the signal according to its grid voltage. The amplified signal is then applied to the speakers.

Single-ended amplifiers are generally simpler and more economical to manufacture than push-pull amplifiers. They also produce a warmer, more analog sound than push-pull amplifiers. However, single-ended amplifiers have lower output power than push-pull amplifiers.

Push-pull amplifier

In a push-pull amplifier, two pairs of power tubes operate in opposition of phase. This means that the audio signal is applied to two power tubes, one with a positive polarity and the other with a negative polarity. The two signals are then amplified and combined to produce a complete output signal.

Push-pull amplifiers are generally more powerful than single-ended amplifiers. They also produce a clearer, more detailed sound than single-ended amplifiers. However, push-pull amplifiers are generally more complex and more expensive to manufacture.

Comparison of single-ended and push-pull amplifiers

Conclusion

The choice between a single-ended amplifier and a push-pull amplifier is a matter of personal preference. Single-ended amplifiers are a good choice for audiophiles who are looking for a warm, analog sound. Push-pull amplifiers are a good choice for music lovers who are looking for high output power and clear, detailed sound quality.