I'm trying to identify the origin of a circuit board inside a pair of unbranded stereo active speakers. No logo, no model number—just generic "MULTIMEDIA SPEAKER SYSTEM" printed on the front.
Main details:
- PCB marked FS-750-2025 with a logo that looks like a stylized sail inside concentric circles
- Audio chip: UTC TEA2025, stereo configuration
- Potentiometers: B50K (Volume, Tone, Power)
- Capacitors: 470µF 25V and 1000µF 25V
- Transformer: 230V~ → 19V AC 350mA, thermal fuse rated 115°C
- Speaker: 5W driver with magnet labeled “JY ม5w” (Thai