| Part Number | Manufacturer | Description |
| STK402-020 | Sanyo Semiconductor | Two-Channel Class AB Audio Power Amplifier IC 15 W + 15 W |
| STK402-030 | Sanyo Semiconductor | Two-Channel Class AB Audio Power Amplifier IC 20 W + 20 W |
| STK402-040 | Sanyo Semiconductor | Two-Channel Class AB Audio Power Amplifier IC 25 W + 25 W |
| STK402-050 | Sanyo Semiconductor | Two-Channel Class AB Audio Power Amplifier IC 30 W + 30 W |
| STK402-070 | Sanyo Semiconductor | Two-Channel Class AB Audio Power Amplifier IC40W + 40W |
| STK402-090 | Sanyo Semiconductor | Two-Channel Class AB Audio Power Amplifier IC 50 W + 50 W |
| STK402-100 | Sanyo Semiconductor | Two-Channel Class AB Audio Power Amplifier IC 60 W + 60 W |
| STK402-120 | Sanyo Semiconductor | Two-Channel Class AB Audio Power Amplifier IC 80 W + 80 W |
| STK402-220 | Sanyo Semiconductor | Three-Channel Class AB Audio Power Amplifier IC 15 W + 15 W + 15 W |
| STK402-230 | Sanyo Semiconductor | Three-Channel Class AB Audio Power Amplifier IC 20 W + 20 W + 20 W |
| STK402-240 | Sanyo Semiconductor | Three-Channel Class AB Audio Power Amplifier IC 25 W + 25 W + 25 W |
| STK402-250 | Sanyo Semiconductor | Three-Channel Class AB Audio Power Amplifier IC 30 W + 30 W + 30 W |
| STK402-270 | Sanyo Semiconductor | Three-Channel Class AB Audio Power Amplifier IC 40 W + 40 W + 40 W |
| STK402-920 | Sanyo Semiconductor | Class AB Audio Power Amplifier IC 15 W x 5 Channels |
| STK402-930 | Sanyo Semiconductor | Class AB Audio Power Amplifier IC 20 W x 5 Channels |
| STK402-940 | Sanyo Semiconductor | Class AB Audio Power Amplifier IC 25 W x 5 Channels |
| STK402-950 | Sanyo Semiconductor | Class AB Audio Power Amplifier IC 30 W x 5 Channels |
| STK403-430 | Sanyo Semiconductor | Six-Channel Class AB Audio Power Amplifier IC 20 W x 6 Channels |
| STK403-440 | Sanyo Semiconductor | Six-Channel Class AB Audio Power Amplifier IC 25 W x 6 Channels |
| STK403-450 | Sanyo Semiconductor | Six-Channel Class AB Audio Power Amplifier IC 30 W x 6 Channels |
| STK4030V | Sanyo Semiconductor | AF Power Amplifier (Split Power Supply) (35 W min, THD = 0.08%) |
| STK4032X | Sanyo Semiconductor | AF Power Amplifier (Split Power Supply) (40W min, THD = 0.008%) |
| STK4034X | Sanyo Semiconductor | AF Power Amplifier (Split Power Supply) (45 W min, THD = 0.008%) |
| STK4038X | Sanyo Semiconductor | AF Power Amplifier (Split Power Supply) (60W min, THD = 0.008%) |
| STK4036X | Sanyo Semiconductor | AF Power Amplifier (Split Power Supply) (50W min, THD = 0.008%) |
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