What it is....

This is an innovative amplifier circuit which gives you the sound qualities of class A amplifiers with the power & efficiency of the more common class B amplifier. Based on the capabilities of a Hybrid IC theese Amplifiers use Synchro-bias to achieve the new class A operation.

Ill give you basic outlines of the 3 bias types abovementioned for more insight.

Class A

Class A is well known for its pure distortion free operation because the output transistors never turn off this results in a very high idling current which also makes it very inefficient. It also is costly to manufacture & ship due to power supply size & heatsinks making theese units bulky & heavy for their output size.

Class B

Class B is the most common amplifier design. Theyre very power efficient because the output transistors actually turn off. this results in a switching crossover distortion but nearly all the power is transferred to the speaker resulting in great efficiency & lower heat output making these units cheaper to manufacture.

Synchro-Bias

Synchro-bias has the sound qualities of the conventional class A amp. The output transistors are never turned off. Theyre left constantly on in the ready state, eliminating switching crossover distortion at all output levels. The idling current is relatively light. Allowing more power to drive the speakers, making this circuit nearly as efficient as the class B circuits.

Diagrams