Sony TA 1055A (1971)
Specifications
| Feature | Specification |
| Year of Production | 1971-1973 |
| Power Specifications | 25W per channel (8Ω), stereo |
| Impedance | 4-16Ω |
| Sensitivity | Unknown |
| Key Features | DC amplifier design, direct-coupled OCL output, dual power transformers, FET input stage, separate power supplies for each channel, front panel headphone jack |
Historical Significance
Part of Sony's first generation of high-quality integrated amplifiers, notable for its advanced DC amplifier design that eliminated coupling capacitors in the signal path, representing Sony's early commitment to high-fidelity audio engineering
Sound Signature
Clean, transparent, and detailed with excellent transient response, neutral tonal balance, good bass control, and low distortion characteristics
Maintenance and Restoration Tips
Aging electrolytic capacitors, potentiometer cleaning, thermal drift in DC offset requiring adjustment, occasional relay issues, power switch wear
Collectibility and Market Value
- Market Value: $150-$300 depending on condition and restoration status
- Collectibility Rating: 7/10
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