Pioneer SA-100

Commentary

A high-grade stereo pre-main amplifier that uses all-stage direct connection OCL circuits.

The power amplifier section uses a fully connected circuit with two positive and negative power sources using silicon transistors.
Since the coupling capacitor and output capacitor are eliminated and the speaker is directly driven, the low and high frequency ranges, which had been blocked by the capacitor in the past, become flat, enabling wide-band playback.

In the preamplifier section, a 3-stage direct connection circuit using low-noise silicon transistors is used for the head amplifier, and a 3-stage direct connection NF type circuit using a first stage low-noise FET is used for the tone control section.

The protection circuit is a combination of an electronic circuit and a power relay.
This not only protects the speakers and power transistors from destruction, but also reduces noise when the power switch is turned on by muting the power supply.
In addition, this protection circuit is an automatic recovery type which returns to normal condition when trouble is solved.

Equipped with 2 Phono inputs. In addition to the MM type, the Phono2 position also allows the use of an MC cartridge with a separately sold transformer.

Equipped with a low / high filter and muting switch that can switch the cutoff frequency in two stages.
You can also use a switch on the rear panel to divide the preamp and power amp sections.

In the SA-100, the characteristics of each unit are measured and attached as technical data that can be understood at a glance.

Model Rating

Type	Stereo pre-main amplifier
Power Amplifier Unit
Circuit system	All-stage direct connection quasi complimentary service system
Music Power (IHF)	240W (4 Ω) 170W (8 Ω)
Effective power	1 kHz Single-ch drive : 94W/94W (4 Ω) 67W/67W (8 Ω) Both channel drive : 82W + 82W (4 Ω) 57W + 57W (8 Ω) 20 Hz to 20 kHz, both channel drive : 47W + 47W (8 Ω, Distortion Factor 0.3% or Less)
Harmonic distortion factor	0.3% or Less (Effective Output) 0.03% or Less (at 34W/34W output)
Cross modulation distortion factor	0.2% or Less (Effective Output) 0.05% or Less (at 34W/34W output)
Output Bandwidth (IHF)	5 Hz to 50 kHz
Frequency characteristic	5 Hz to 80 kHz ± 1 dB
Input Sensitivity / Impedance	500mV/100k Ω (at effective output, 1 khz)
Load impedance	4 Ω ~ 16 Ω
Damping factor	65 or More (8 Ω, 1 kHz)
Center channel output voltage	500mV
Preamplifier Section
Output voltage	Effective output : 3 V Maximum power : 5 V
Harmonic distortion factor	Not more than 0.1%
Frequency characteristic	20 Hz to 60 kHz ± 1 dB
Input Sensitivity / Impedance (1 kHz at effective output)	Phono1: 2.9mV/50k Ω 58mV/100k Ω (CER) Phono2: 2.9mV/20, 50, 100k Ω 115 μ V/30 Ω (With MC Transformer) MIC: 2.2mV/50k Ω Tuner, AUX1, 2, Tape Mon1, 2 : 200mV/200k Ω
Recorded output	Tape Rec (pin jack) 1, 2 : 200 mv Tape Rec : 30 mV
Tone control (3 dB step)	Bass : 100 Hz, -9dB to + 12 dB Treble : 10 kHz, -12dB to + 9 dB
Filter	Low filter : -3dB (30 Hz, 60 Hz), 12dB/oct. High filter : -3dB (6 kHz), -4dB (12 kHz), 12dB/oct.
Equalizer (Phono)	RIAA, S. T. D.
Loudness (Volume -40dB)	100Hz:+11.5dB 10kHz:+6.5dB
Muting	-20dB
Hum, noise	Phono : 80 dB or more AUX : 100 dB or more
<General>
Power consumption	Rating : 190W Maximum : 340W
External dimensions	Width 430x Height 145x Depth 337 mm
Weight	12.8kg