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| Type | Stereo tape deck | 
|---|---|
| Track System | 4-track, 2-channel stereo | 
| Tape Speed | 3.75 ips / 7.5 ips | 
| Frequency Response | 30Hz - 22kHz (7 1/2 ips) | 
| Inputs | Line, Microphone | 
| Outputs | Line out, Headphones | 
Detailed technical specifications and performance parameters of the tape deck models.
Procedures and diagrams for measuring tape speed, wow/flutter, frequency response, S/N, THD, cross talk, etc.
Explanation of the tape transport system's operation and circuit diagrams for different modes.
Guides for adjusting reel table height, pinch wheel pressure, and brake tension for optimal performance.
Procedures for adjusting head height and azimuth alignment for clear audio playback.
Steps for adjusting playback level, VU meter sensitivity, and high-frequency response for audio circuits.
Detailed schematic diagram for the GX-225D model.
Detailed schematic diagram for the GX-221 model.
Detailed schematic diagram for the GX-221D model.