| Manufacturer | Part Number | Description |
|---|---|---|
SANYO (now Panasonic) |
STK439 | Single Power Supply / 2Ch Amplifier |
SANYO (now Panasonic) |
STK4392 | AF Power Amplifier |
| Unknown Manufacturer | STK4392 | Integrated circuit |
| Unknown Manufacturer | STK435 | (STK433 / STK436 / STK437 / STK439) THICK FILM HYBRID IC |
| Unknown Manufacturer | STK439 | THICK FILM HYBRID |
| Unknown Manufacturer | STK439-xxx | (STK4xx) 2-Channel 5 to AF Power Amp |
