Pioneer Hybrid Amplification

Pioneer Hybrid Amplification (PHA) is a unique structure to reduce the distortion caused by the dynamic change of heat in the system.

Temperature is a key factor since heat directly affects the amount of bias required by an output transistor to reproduce sound.

Our thermal compensation transistor provides transistor temperature feedback to the bias circuit, ensuring that the correct amount of bias is applied to the transistors, regardless of temperature.

Moreover, to enhance dissipation of heat, the output transistors Thermal Compensation Circuit are all mounted to the same portion of the heat sink.

The advantage is thorough reduction of the distortion by controlling bias current quickly in accordance with the change of the power transistor temperature. Secondly, there is an ultra short signal path by integrating major parts of the power amplification stage.