Amplifier 140w power audio ic circuit output impedance approximately 8ohm dc Datasheet stmicroelectronics 140w audio amplifier with ic stk070
70 Watt Stereo Amplifier Circuit - Homemade Circuit Projects
70 watt stereo amplifier circuit Amplifier watt circuits channels identical Hcf4052 datasheet(pdf)
140W audio amplifier with IC STK070 - Electronic Circuit
70 Watt Stereo Amplifier Circuit - Homemade Circuit Projects
HCF4052 Datasheet(PDF) - STMicroelectronics