2.5-Watt Pre-Wired Amplifier Circuit Board - Great for homemade amplifiers!

in a previous video I showed you how [to] create a simple class AB audio amplifier that consists of the NE5554 op-amp and the Push-pull Bipolar junction Transistor output stage Now even though the circuit did work decently is there was one problem... its power loss We can identify it's cause by taking a look at the simplified functional block diagram Firstly our originally applied audio signal gets it's voltage amplified by an op-amp Since such Op amps can only supply very little power the next part of the circuit is a BJT output stage That modulates the supply voltage of 12 volts [to] become the audio signal that is not only voltage amplified, but can also supply a sufficient current for the speaker. The only problem is that the transistors work in the active region. Which means there exists a noticeable voltage drop across the collector-emitter path and thus power loss is created Whic