V 70 Class A

by Octave


The V 70 Class A amplifier merges the enticing midrange sound characteristic of ...

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The V 70 Class A amplifier merges the enticing midrange sound characteristic of Class A amplifiers with the efficiency of push-pull configurations, leading to a novel amplifier concept with sophisticated sound dynamics and well-managed power output. This amplifier features the unique Dynamic Bias Control technology, innovated by Andreas Hofmann. This system enhances the typical limited dynamic range of Class A amplifiers, allowing it to deliver a steady output power of 50 W RMS and up to 70 W peak power when augmented with the Super Black Box technology.

Given its pentode circuit design, the V 70 Class A maintains the revered tonal purity of Class A across the full audio spectrum, even at the highest levels of output modulation. This substantial increase to a possible 70 watts of peak power significantly surpasses that of most traditional Class A amplifiers, ensuring compatibility with a broad array of speaker systems. Standard features include a balanced input and, for vinyl enthusiasts, the option to include a specialized phono board supporting either MC or MM cartridges.

Furthermore, the V 70 Class A utilizes an auto-bias circuit, simplifying user interaction by removing the need for manual bias adjustments. The amplifier automatically calibrates itself to whichever tubes are installed, although it still offers the familiar BIAS measurement system through colored LEDs to monitor the condition of the four output tubes. Just like other superior models from Octave, this amplifier includes the Power High and Low preselection options that allow optimization according to different power tubes. To ensure optimal performance within its high-powered Class A operation, tubes such as the KT 120 or KT 150 are recommended.

The modern aesthetic of the V 70 Class A is complemented with the availability of two sleek finishes—silver or black. This aligns well with contemporary audio equipment and decor, making it both a centerpiece and a talking point in any audiophile's setup. The integration of these advanced technologies and features fosters an amplifier capable of delivering both exceptional sound quality and reliable performance under varying audio demands.

Features

General Features

  • Full Metal Remote Control: Volume control
  • Eco Mode: Power saving mode
  • Bias Control: Quiescent current display and setting
  • Adjustable Pre-Out: Preamp output RCA
  • HT Bypass: Bypass function for multichannel receiver / TV
  • Protection System:
    • Soft Start
    • Protection circuit for amplifier and output tubes
  • Power Selection: Adaptation to alternative output tubes

Performance

  • Output Power:
    • High: 2 x 50 W / 4 ohms
    • Low: 2 x 25 W / 4 ohms
  • Frequency Response: 20 Hz – 70 kHz @ 50 W - 1 / - 3 dB
  • Total Harmonic Distortion: 0.1% at 10 W / 4 ohms
  • Signal-to-Noise Ratio: -100 dB / 50 W unrated