Pioneer SA-90
¥ 54,800 (around 1969)
Commentary
The pre-main amplifier of the UA series announced as the definitive pre-main amplifier.
It has two Phono MAG input terminals, one for MM type and the other can be used by switching between MM type and MC type.
The preamp and main amp can be connected and separated by a switch so that they can be used separately.
Center channel output is mounted.
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Model Rating
| Type | Stereo pre-main amplifier |
| Music power (0.3% distortion rate, 1 kHz, IHF) |
220W (4 Ω) 145W (8 Ω) |
| Continuous rated output (Distortion Rate 0.3%, 1 kHz, Both Channel Operation) |
64W + 64W (4 Ω) 50W + 50W (8 Ω) |
| Effective Output (Distortion Rate 0.3%, 1 kHz, Single-channel Operation) | 60W/60W (8 Ω) |
| Frequency characteristic | AUX : 20 Hz to 50 kHz ± 1 dB |
| Output Bandwidth (constant distortion rate 0.3%, IHF) | 20 Hz to 50 kHz |
| Signal-to-noise ratio (Volume Max, Tone Midpoint Effective power, IHF) |
Phono MAG:80dB AUX:100dB |
| Distortion factor | 0.08% or Less (6W ~ 45W, 1 khz) |
| Input Sensitivity / Impedance | Phono 1, 2 (MM) : 3mV/43k Ω Phono 2 (MC) : 0.155mV/150 Ω Phono/CER : 71mV/100k Ω MIC : 1.9mV/50k Ω Tape Head : 1.8mV/150k Ω Tuner, Tape Monitor, AUX : 180mV/200k Ω Main Input : 500mV/100k Ω |
| Damping factor | 67 or More (8 Ω, 1 kHz) |
| Output terminal | Speaker terminal : 4 Ω ~ 16 Ω Headphone jack Tape-Rec terminal for simultaneous tape recording DIN standard TAPE recorder / reconnector Preamplifier output (Pre Out, 3 v) Center Channel Output (Center Out, 500 mv) |
| Equalizer | Phono:RIAA Tape Head:NAB |
| Residual noise (volume minimum, tone mid-point) | 0.8 mv or Less (8 Ω) |
| Attachment mechanism | Tone Control (3 dB step) High/Low Filter Loudness contour Audio muting (-20dB) AC outlet (2 interlocked systems, 1 non-interlocked system) |
| Power supply voltage | 100 VAC, 50Hz/60Hz |
| Power consumption | No signal : 40 VA Maximum : 250 VA |
| External dimensions | Width 405x Height 140x Depth 339 mm |
| Weight | 12.3kg |