Manufacturer: Ningbo Rixing Electronics Co., Ltd.
Model: RXA15P220U
Power Rating: 230VA
Primary Voltage (Pri): 115V + 115V, 50/60Hz
Primary Wire Colors: Red-Blk + Red-Blk
Integrated Protection: Thermal Switch (105 degrees C)
Thermal Switch Wire Colors: Yel-Blk
Secondary Output 1 (Sec): 38V - 0V - 38V at 3A
Secondary Output 1 Wire Colors: Yel-Blk-Yel
Secondary Output 2 (Sec): 17V - 0V - 17V at 0.2A
Secondary Output 2 Wire Colors: Blu-Blk-Blu
Secondary Output 3 (Sec): 0V - 9V at 0.2A
Secondary Output 3 Wire Colors: Grn-Grn
Production Date: 16.06.2014
This specific multi-rail toroidal transformer layout—featuring a high-power center-tapped secondary (38V-0V-38V at 3A) alongside lower-voltage auxiliary rails (17V-0V-17V and 0V-9V)—is a classic custom-ordered design engineered to run an active powered speaker cabinet or a professional PA mixing amplifier.
The main high-current 38V rail supplies the primary power amplifier stage.
The secondary lower-voltage rails (17V and 9V) run the low-voltage preamp boards, LED indicators, display screens, or internal control circuitry