Sanyo production of STK4172 , STK4182 and STK4192 amplifiers from STK series PCB drawing is compatible with one of the leg connections of integrals
STK4172 2X40W THD 0.4% Operating voltage 2X48V STK4182 2X45W THD 0.4% Operating voltage 2X50V STK4192 2X50W THD 0.4% Operating voltage 2X52.5V
The STK4102II series ( STK4172II ) and STK4101V series (high-grade type) are designed for high-grade operation. Small-sized package which pinpoints the cooler size of the unit.