This amplifier became famous in the 1970s, it was sold in kit by Ibrape, Philips subsidiary for electronic components in Brazil. It was an amplifier with output up to 40 W, and excellent sound quality. Here's your circuit rescued from a catalog of own Ibrape of the time. We kept the original design, noting that the source must provide 45 W with a power supply of at least 2 A for each channel. The output transistors must be provided with excellent radiators. BC108 has as equivalent BC548, the BC177 or BC577 and T4, T5 can be replaced with BD135, BD136.
