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Pioneer A-333



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Brand: Pioneer

The Pioneer A-333 is a stereo integrated amplifier that was introduced by the Japanese electronics company Pioneer in the mid-1970s. It is part of Pioneer's "Specialty Audio" line, which includes high-end audio components.At its core, the A-333 is a tube amplifier, featuring two EL34 power tubes and four 12AX7 preamp tubes. It delivers 30 watts per channel into 8 ohms, or 50 watts per channel into 4 ohms, making it a suitable choice for driving a wide range of loudspeakers.One of the unique features of the A-333 is its "slow-start" power circuitry, which gradually ramps up the voltage to the tubes over a period of time, reducing the risk of tube failure due to thermal shock. Additionally, the amplifier features a high-quality phono stage, making it an excellent choice for vinyl enthusiasts who prefer the warmth and richness of tube amplification.The A-333 also includes various input and output options, including two independent preamp stages, as well as tape loop and headphone outputs. The preamp stages can be switched in parallel to provide additional flexibility for connecting multiple audio sources.Although it was introduced several decades ago, the Pioneer A-333 is still highly regarded by audiophiles today for its rich, tube-like sound signature and high build quality. Many users praise its sweeping, detailed sound and its ability to convey a sense of delicacy and dynamism in music.Overall, the Pioneer A-333 is a classic, tube-based audio component that brings warmth, richness, and an incredible degree of musical detail to any listening session. While it may no longer be in production, it remains a popular choice for both vintage audio enthusiasts and those in search of a unique, high-end audio experience.



  • Power Output: 40W into 8Ω (stereo)
  • Frequency Response: 5Hz to 100kHz
  • Distortion: 0.02%
  • Speaker Impedance:
  • Input Sensitivity: 2.5mV (mm), 150mV (line)
  • Signal to Noise Ratio: 89dB (mm), 107dB (line)
  • Line Output: 150mV (line)
  • Dimensions: 420 x 348 x 126 mm
  • Weight: 7.0 kg
  • Year:
  • Price:

Pioneer A-333

Pioneer A-333

Pioneer A-333

Pioneer A-333

Pioneer A-333

Pioneer A-333

Pioneer A-333

Pioneer A-333



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