SA-6300(1976)

The Pioneer SA-6300, produced from 1975 to 1977, is a vintage integrated stereo amplifier manufactured in Japan, offering a compelling blend of affordability and performance. Priced at approximately 550 DM or ¥29,800 in its era, it features a sleek silver metal case with an optional walnut-finished wood case. The amplifier employs an all-stage direct-coupled OCL (Output Capacitor-Less) circuit in the power section, eliminating interstage capacitors for improved signal purity. Its equalizer uses an IC-based 3-stage direct-coupled circuit with differential amplification for enhanced DC stability and noise rejection. Known for its accurate and detailed sound with deep bass, the SA-6300 is a favorite among vintage audio enthusiasts, though its transistors (e.g., 2SC1312, 2SA726) are prone to moisture-related failure, often requiring recapping or transistor replacement for optimal performance.

• Power Output (Stereo): 20 watts per channel into 8 ohms (20Hz–20kHz, 0.08% THD)

• Dynamic Power: Not specified for 4 ohms or lower impedances

• Total Harmonic Distortion: 0.08% (at rated output)

• Damping Factor: Not specified

• Frequency Response: 20Hz to 30kHz (Aux input)

• Phono Stage:

  • Input Sensitivity: 2.5mV (Moving Magnet)

  • Signal-to-Noise Ratio: 70dB (MM)

• Line-Level Inputs (Tuner, Aux, Tape):

  • Input Sensitivity: 150mV

  • Signal-to-Noise Ratio: 85dB

• Features:

  • Tone Controls: Bass (±5dB at 100Hz), Treble (±5dB at 10kHz), 11-point click-stop

  • Loudness Contour: Enhances low-volume listening

  • Tape Monitor: Lever switch for tape playback/recording

  • Protection Circuit: Combines electronic circuit and fuse, with muting for power on/off

• Connectivity:

  • Inputs: Phono, Tuner, Aux, Tape (Rec/Play)

  • Outputs: 2 pairs of speaker terminals (4–8 ohms), 6.3mm headphone jack, Tape output

• Physical Specifications:

  • Dimensions: 350 x 125 x 282 mm (W x H x D)

  • Weight: 6.9 kg

  • Power Supply: AC 110/120/130/220/240V, 50/60Hz

  • Power Consumption: Not specified