This post explains for the Amplifier STK4141.
The Part Number is STK4141.
The function of this semiconductor is 2-channel AF Power Amplifier
Package : ZIP Type
Manufacturers : Sanyo
Preview images :
1. Smaller-sized package as compared with the STK450 series
2. Built-in muting circuit to cut off various kinds of shock noise
3. Greatly reduced heat sink due to case temperatue 125°C guaranteed.
4. Excellect cost performance.
1 page ( Equivalent Circuit )