Sony TA 8650 (1978)
Specifications
| Feature | Specification |
| Year of Production | 1978-1980 |
| Power Specifications | 80W per channel (8Ω, 20Hz-20kHz, 0.03% THD), 100W per channel (4Ω) |
| Impedance | 4-16Ω |
| Sensitivity | 150mV (line), 2.5mV (MM phono) |
| Key Features | Dual mono construction, DC amplifier design, FET input stage, toroidal power transformer, direct coupling, separate power supplies for each channel, low negative feedback, V-FET output transistors (2SK76/2SJ26) |
Historical Significance
Flagship integrated amplifier from Sony's ES (Elevated Standard) series, representing the pinnacle of V-FET technology and Sony's engineering excellence during the late 1970s
Sound Signature
Exceptionally clean, detailed, and transparent with tight bass control, smooth midrange, and extended highs. Often described as having tube-like warmth with solid-state precision
Maintenance and Restoration Tips
V-FET transistors are rare and failure-prone, power supply capacitor aging, thermal management concerns due to high operating temperatures, difficult to service due to complex design
Collectibility and Market Value
- Market Value: $2,000-$4,000+ depending on condition and originality
- Collectibility Rating: 9/10
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Related Models
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- Akai AM-2850 (1975)
- Akai AP-206 (1975)
- Nakamichi BX-1 (1985)
- Acoustic Research research-ar-17 (1978)
- Acoustic Research AR-19 (1994)