GoldStar - GSQ-5200 - GST-5200 Hi-fi set - Multiple models

Specifications GSQ-5200 (Equalizer) (real-world typical data)

Based on listings and service documentation:

Type: 12-band stereo graphic equalizer
Frequency range: ~16 Hz – 32 kHz
Control range: ±12 dB
Bands: 12 sliders per channel
Signal-to-noise ratio: ~113 dB (high quality for its class)
THD: ~0.003%
Connections: RCA line in/out + tape loop
Power: 220–240V AC
Format: 43 cm hi-fi rack unit (standard full size)

In simple terms: very good quality analog equalizer for its era

GST-5200 (Tuner)
Type: AM/FM stereo tuner
Role: radio receiver for the system
Typical features:
Analog tuning scale / digital display (varies by version)
Station memory presets (system dependent)
Signal strength indicator
Build: full-width hi-fi unit
Era: ~1983–1987 (same family as GSQ-5200)

Function: “radio source” of the system