STK4221 Amplifier PCB
STK4221 amp It works just fine Like I said, 5.1 part of the system RL RR FR FL output stage was STK4221 It has been used CENTER and BASS Part..
IC AMPLIFIER Archive
Amplifier circuits with TDA7294, LM3886, TDA2030, LM1875 and many different models. Integrated amplifier circuits are easier to construct than transistor amplifiers, and high-power amplifiers can be built with fewer electronic components.