STK4184MK2 Integrated Circuit
The main technical specifications of the STK4184II (STK4184MK2) integrated circuit, a 2-channel hybrid audio power amplifier manufactured by Sanyo, are as follows:
- Function: AF audio power amplifier (Dual Audio Power Amplifier)
- Output Power (Po): 2 x 25 W (into an 8 ohm load, THD = 0.4%)
- Recommended Supply Voltage: ±22.5 V (Dual/Symmetrical)
- Maximum Supply Voltage: ±35 V
- Total Harmonic Distortion (THD): 0.4% (at 25W)
- Frequency Response: 20 Hz to 50,000 Hz
- Load Impedance: 8 Ω to 4 Ω
- Quiescent Current (Icc): 40 mA max
- Package: SIP-18 (18-pin Single In-line Package)
It is commonly used in mid-range Hi-Fi stereo systems and vintage audio receivers.

