Sansui AU 7900 (1977-1979)

Market Value: $600-$1200 depending on condition and restoration status
Collectibility Rating: 8/10

Name: Sansui AU 7900
Brand: Sansui

Specifications

Feature	Specification
Year of Production	1977-1979
Power Specifications	65W per channel (8Ω, 20Hz-20kHz, 0.1% THD), 75W per channel (4Ω)
Impedance	4-16Ω
Sensitivity	150mV (MM phono), 2.5mV (MC phono), 150mV (aux)
Key Features	Dual power supply, DC amplifier design, FET differential input stage, direct coupling, phono stage with MM/MC support, tone defeat switch, loudness control, pre-out/main-in jacks

Historical Significance

Flagship integrated amplifier in Sansui's acclaimed 'Alpha Series', representing peak Japanese solid-state engineering from the late 1970s. Known for exceptional build quality and innovative circuit design that rivaled separate components.

Sound Signature

Clean, detailed, and neutral with excellent transparency. Tight bass control, smooth midrange, and extended highs. Often described as 'tube-like' in its musicality despite being solid-state.

Maintenance and Restoration Tips

Aging electrolytic capacitors, dirty controls and switches, DC offset adjustment needed, occasional relay issues. Generally robust but requires servicing after 40+ years.