| No | Part number | Description ( Function ) | Manufacturers | |
| 5 | STK4191 | 2-CHANNEL AF POWER AMP |
 ETC |
|
| 4 | STK4191II | (STK4101 II Series) 2-CHANNEL AF POWER AMP |
ETC |
|
| 3 | STK4191V | AF Power Amplifier (Split Power Supply) (50W + 50W min / THD = 0.08%) Ordering number: EN1651B Thick Film Hybrid IC STK4191V AF Power Amplifier (Split Power Supply) (50W + 50W min, THD = 0.08%) Features • Built-in muting circuit to cut off various kinds of pop noise. • Greatly reduced heat sink due to substrate temperature 125°C guaranteed. • Distortion 0.08% due to current mirror circuit. • Pin-compatible with the STK4101II series. |
 Sanyo |
|
| 2 | STK4191V | AF Power Amplifier |
 Sanyo Electric |
|
| 1 | STK4191xxx | Hybrid IC |
Sanyo Electric |
|
[1]
List of most widely used semiconductors
| Part Number | Function | Manufacturers | |
| 1N4007 | The 1N4007 is a rectification diode that is designed for high-voltage applications, typically up to 1000V. It has a maximum current rating of 1A and a forward voltage drop of around 0.7V. |
 Vishay |
|
| LM317 | This is a popular adjustable voltage regulator. |
 ON Semiconductor |
|
6N137 | LM393 | 2N3906 | 2N2222 | TIP120 | 1N5818 | LM324N | A1015 | SMAJ20CA |
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