Sansui BA-60 (1968)

A solid-state stereo power amplifier released by Sansui Electric in July 1968, designed for high-fidelity audio systems.

Overview

The Sansui BA-60 is a stereo power amplifier manufactured by Sansui Electric Company Limited, released in July 1968. It was positioned as a "solid-state basic amplifier" and pairs with other components like the CD-5 electronic crossover unit. It can be used alongside the BA-90, AU-777, or AU-555 amplifiers in multi-unit setups. The amplifier delivers 25W per channel into 4Ω and features independent volume and phase controls for left and right channels.

Specifications

Effective power (4 Ω)	25W/25W ± 1 dB
Effective power (8 Ω)	20W/20W ± 1 dB
Music Power IHF (4 Ω)	60W ± 1 dB
Music Power IHF (8 Ω)	50W ± 1 dB
Harmonic distortion factor	0.3% or Less (at Rated Output)
Intermodulation distortion factor (60 hz : 7 khz = 4 : 1)	0.3% or less
Power Bandwidth IHF (8 Ω)	20 Hz ~ 40 kHz
Frequency Characteristics (Normal Output, 8 Ω)	20 Hz ~ 60 kHz ± 1 dB
Input Sensitivity (1 kHz, Effective Output)	0.7 V ± 3 dB
Input impedance	50k Ω or more
Load impedance	4 Ω ~ 16 Ω
Damping factor	46 (8 Ω)
Hum and noise (IHF)	80 dB or more
Channel separation	50 dB or more
Power supply voltage	AC100V/117V/220V/240V, 50Hz/60Hz
Power consumption	100VA
External dimensions	Width 152 x Height 111 x Depth 264 mm
Weight	4.2kg

Design

The amplifier uses a SEPPP OTL-ITL circuit with silicon transistors and includes a circuit breaker for power transistor protection. It features left and right independent volume controls, phase changeover switches, and an oral/null balance switch for adjusting left/right balance. An input level adjuster allows compatibility with various preamps.

Context

The Sansui BA-60 can be used in conjunction with the SANSUI CD-5 electronic crossover unit and is mentioned alongside the BA-90, AU-777, and AU-555 amplifiers as compatible components in expanded audio systems.