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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