Pioneer SA-6300

Commentary

A pre-main amplifier with standard configuration and Pioneer's traditional amplifier design technology.

The power amplifier section employs an all-stage direct connection OCL circuit that eliminates all interstage capacitors from the first stage to the last stage.
In addition, the characteristics are improved by carefully selecting the transistors to be used and combining PNP-NPN with good matching pair characteristics.

An IC is used for the equalizer, and a 3-stage direct connection circuit configuration with differential amplification at the first stage is used.
By using differential amplification in the first stage, the DC stability of the circuit is improved and the operation is stabilized. At the same time, the cancellation effect is obtained against temperature change, power supply fluctuation, and mixing of noise components.
In addition, the 3-stage direct-coupled circuit allows sufficient DC NFB to be applied to the differential part, so that the distortion component is suppressed over a wide band.

Both Bass and Treble use an 11-point tone control with a Klix/Klukš top.
To improve sound quality at low volume, a Loudness Contour is also installed.

Equipped with a protective circuit that combines an electronic circuit and a fuse.

Equipped with a tape monitor circuit using a lever switch.

The wood case with walnut finish that can be used for SA-6300, TX-6300, SA-6700, TX-6700 was sold separately.

Model Rating

Type	Stereo pre-main amplifier
Power Amplifier Unit
Circuit system	Pure complimentary service OCL
Effective output (both channels driven, 40 Hz to 20 kHz)	20W + 20W (4 Ω) 20W + 20W (8 Ω)
Harmonic distortion factor (40 Hz to 20 kHz)	0.8% or Less (Actual Output) 0.08% or Less (8 Ω at 1W output)
Cross modulation distortion factor	0.8% or Less (Actual Output) 0.08% or Less (8 Ω at 1W output)
Output Bandwidth (IHF, both channel drives)	5 Hz ~ 70 kHz (Distortion Factor 0.8%)
Output terminal	Speaker A / B : 4 Ω ~ 16 Ω Speaker A + B : 8 Ω ~ 16 Ω Headphone : 4 Ω ~ 16 Ω
Damping factor (20 Hz to 20 kHz)	25 or More (8 Ω)
Preamplifier Section
Input Sensitivity / Impedance	Phono : 2.5mV/50k Ω Tuner, Aux, Tape PB (Pin/Din) : 150mV/50k Ω
Phono maximum allowable input (harmonic distortion rate 0.1%)	150mV
Output Level / Impedance	Tape Rec:150mV Tape Rec (Din) : 30mV/80k Ω
Frequency characteristic	Phono (RIAA deviation) : 30 Hz to 15 kHz ± 0.5 dB Tuner, Aux, and Tape PB : 20 hz to 30 khz + 0.5 to 1.0 db
Tone control	Bass : + 9 dB ~ -8dB (100 Hz) Treble : ± 6 dB at 10 kHz
Loudness contour (at Volume -40dB)	+8dB(100Hz) +5dB(10kHz)
S/N (IHF, A-network short circuit)	Phono : 70 dB or more Tuner, Aux, Tape PB : 90 dB or higher
<General>
Semiconductor used	Transistor : 19 IC : 1 Diode, etc. : 13 pcs
AC outlet	Power switch interlock : 1 system Power switch not linked : 1 system
Power supply voltage	100 VAC, 50Hz/60Hz
Power consumption	50W (rated) 135W maximum
External dimensions	Width 350x Height 125x Depth 282 mm
Weight	6.4kg
Sold separately : Wood Case JA-C60 (¥ 4,500)
External dimensions	Width 404x Height 167x Depth 276 mm
Weight	2.2kg