If you'd like, I can for your power supply design.
The following technical parameters are standard for the STK412-530 series: Parameter Specification 150W + 150W (dual channel) THD 0.7% to 0.8% (20 Hz to 20 kHz) Operating Voltage (AC) Dual 24V to 36V AC (Recommended) DC Supply Voltage (VH) Max ±69V (quiescent); Operating ±40V to ±50V DC Load Impedance 4Ω to 8Ω supported Package Dimensions 78 mm × 44 mm × 9 mm (SIP-22 package) Operating Temp Up to 125°C substrate temperature Features & Design STK412-530 INTEGRATED CIRUCIT STK-412-530 - Nikkoe stk412530 datasheet
Because Sanyo hybrid ICs are no longer in active mass production, encountering them usually happens during retro audio repair or vintage restoration work. Thermal Management If you'd like, I can for your power supply design
Some DIY modules on the market may only provide a single set of supply voltage inputs by internally deriving the low voltage from the high voltage supply. Always verify the specific requirements of your PCB before application. Always verify the specific requirements of your PCB
While you should always consult the official manufacturer datasheet for exact tolerances, here are the typical operating parameters for the STK412530 series: