Sony STR 7025 (1975)
Specifications
| Feature | Specification |
| Year of Production | 1975-1977 |
| Power Specifications | 18W per channel (8Ω, 20Hz-20kHz, 0.8% THD) |
| Impedance | 4-16Ω |
| Sensitivity | Unknown |
| Key Features | DC amplifier design, FET front end, dual power supply, loudness contour, tape monitor, phono input, tone controls, walnut veneer case |
Historical Significance
Part of Sony's first generation of DC amplifiers, representing early adoption of direct-coupled circuitry in consumer audio for improved frequency response and lower distortion
Sound Signature
Clean, detailed, neutral presentation with good transient response and low distortion, slightly clinical character with excellent clarity
Maintenance and Restoration Tips
Aging electrolytic capacitors, dirty controls and switches, occasional transistor failures in power supply, lamp replacement for dial lights
Collectibility and Market Value
- Market Value: $150-$300 depending on condition and cosmetic appearance
- Collectibility Rating: 6/10
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