Simplicity. Finesse. Performance.
The A-10-K Direct Energy Design amplifiers with Symmetrical Construction offer class-leading, high quality sound wrapped in understated, technical elegance.

Unchanging Philosophy in New Style
Pioneer’s development of 2-channel amplifiers for the digital age lead to an evolution of compact circuit structure based on its Direct Energy Design — tailored to reproduce the closest original performance intended by the artist. The shorter signal paths and power train helps reduce signal loss, resulting in minimum effect to the sound quality.
Direct Energy Amplifier Pioneer’s “Direct Energy” concept is pursued to the utmost, featuring optimized power supply/output circuit blocks, as well as parts layout. The unit reproduces clearer sound with reduced distortion. The result is excellent signal transfer and high S/N ratio, with the performance to bring out the best musical reproduction from the integrated amplifier.

Isolated Power Supply
The wirings for the power amplifier, pre-amplifier, and power transformer of the controls are all separated to cut out noise interference. The power circuit for the controls adopts Schottky barrier diodes with minimum noise, which enables noise-free clean power supply to the critical power amplifier section. This allows even more realistic amplification of the audio signals.

Symmetrical Power Amp
These integrated amplifiers feature fully discrete symmetrical internal structure to create true-to-life sound field from two speakers. The symmetrical power amp provides high channel separation for the whole frequency range as well as low distortion characteristics, realizing superb sound image localisation. The amplifier creates lively mid to high-range sound, allowing reproduction of original sound from various sources, including high-resolution audio.

Clean Ground Construction
The unit’s circuit design is based on the clean ground concept, with the shortest and simplest signal paths. The result is reduced distortion with minimum signal interference for improved sonic clarity.

Phono Input
The integrated amplifier is designed for playing everything from the latest digital audio formats to time-honoured analogue records.

Auto Power Down
The integrated amplifier will automatically turn off after being left uncontrolled for a certain time set by the user.

Large Speaker Terminals
High-grade parts are used for the integrated amplifier’s terminals to provide a stable connection for pure sound delivery. All models come with large speaker terminals which can accommodate thick speaker cables.

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Main Features

  • Output Power per Channel
  • 50W
  • Impedance at Output Level
    • 4 Ω - 16 Ω (A / B)
    • 8 Ω - 32 Ω (A + B)
    • 4 Ω - 16 Ω (Bi-wiring)
  • Number of Channels
  • 2
  • Input Connections
    • SACD/CD
    • Phono (MM)
    • Aux
    • Network
    • Recorder
    • Tuner
  • Output Connections
    • Recorder
    • Phones
  • Remote Control

Input Output Connections

  • Digital Coaxial Input/Output
  • Headphone
  • Yes
  • Large speaker terminals
  • Yes
  • Phono Input
  • Yes
  • Pre-amp Output
  • Yes (2.1 ch)
  • Speaker A/B
  • Yes

Audio Features

  • Bass/Treble Tone Controls
  • Yes
  • 'DIRECT' Switch
  • Yes
  • Loudness
  • Yes
  • Muting
  • Yes
  • Source Direct
  • Yes

Power Output

  • Power output per channel
  • 50 W
  • Condition
  • 20 Hz - 20 kHz, 0,1% THD, 4Ω
  • Rated Power Output
  • 50 W per channel
  • AB Class Power Stage
  • Input (Sensitivity/Imp.)
  • Frequency Response
  • 5 Hz - 100 kHz +0/-3 dB
  • Signal-to-Noise Ratio
  • Power Requirements
  • AC 230 V / 50 Hz
  • Power Consumption (in use / standby)
  • 135 W / 0.30 W
  • Auto Power Down
  • Yes

Amplifier Specifications

  • Amplifier
  • D/A Converter
  • Dimensions (W x H x D)
  • 435 x 128 x 360 mm
  • Weight
  • 6.7 kg

“SACD” and “Super Audio CD” are trademarks of Sony Corporation.