ALO Audio Studio Six SET Vacuum Tube Headphone Amplifier

ALO Audio

The Studio Six is a Class-A Single-Ended Triode (SET) circuit design. Zero-Feedback and 100% Tube Amplification.

  • Built For Life

    Uncompromising quality in build and design. Conservative part ratings and circuit design. Translates into effortless, under-stressed operation, extended tube life and long-term amplifier reliability. An obsolescence-proof piece of audio equipment, A timeless design built to last a lifetime.

    Reference Amplification

    Class-A Single-Ended Triode (SET) circuit design with zero-feedback and 100% tube amplification. Designed for resolution of fine musical details, expansion soundstage presentation, and lush tonal quality.

  • Totally Tubes

    Only vacuum tubes with established reputations for sonic virtue are in this design. Selecting tubes that are now and will continue to be available in the global audio marketplace.

    Pure Power

    The power supply is a “Virtual Dual Mono Block” design. Featuring vacuum tube rectification. Filtering for the left and right input stages, including two glow discharge regulator tubes. And separate multi-stage filtering for each left and right channel output tube.

    Designed For Headphones

    A proprietary output stage accommodates a wide range of headphone impedance from 8 to 600 ohms, with ease. The Studio Six drives many pairs of headphones with no sacrifice to fidelity. The ideal amp for shared listening sessions.

    • HEADPHONE IMPEDANCE COMPATIBILITY RANGE: 8 OHMS TO 600 OHMS
    • MAXIMUM RATED OUTPUT POWER: 1,000 MILLIWATTS INTO 8 TO 32 OHMS
    • AMPLIFIER INPUT IMPEDANCE: 95K-OHMS
    • AMPLIFIER INPUT VOLTAGE FOR FULL-RATED OUTPUT VOLTAGE INTO VARIOUS HEADPHONE IMPEDANCES:
      • 00V RMS INPUT FOR 4.0V RMS OUTPUT INTO   16 OHMS
      • 30V RMS INPUT FOR 5.7V RMS OUTPUT INTO   32 OHMS
      • 70V RMS INPUT FOR 7.5V RMS OUTPUT INTO   75 OHMS
      • 85V RMS INPUT FOR 8.3V RMS OUTPUT INTO 150 OHMS
      • 70V RMS INPUT FOR 8.2V RMS OUTPUT INTO 300 OHMS
      • 65V RMS INPUT FOR 8.1V RMS OUTPUT INTO 600 OHMS
    • THD+N (1KHZ INPUT) AT 1V RMS OUTPUT INTO STATED LOAD IMPEDANCES:
      • 32 OHMS: 0.26%
      • 150 OHMS: 0.12%
    • THD+N (1KHZ INPUT) AT 250 MILLIWATTS OUTPUT INTO STATED IMPEDANCES:
      • 32 OHMS: 1.0%
      • 150 OHMS: 2.0%
    • FREQUENCY RESPONSE -3DB (REFERENCED TO 1KHZ, 250 MILLIWATTS OUTPUT) INTO STATED IMPEDANCES:
      • 32 OHMS: 0HZ TO 39KHZ
      • 150 OHMS: 16.5HZ TO 36KHZ
    • FREQUENCY RESPONSE -1DB AT FULL-RATED (2.83V RMS) 1,000 MILLIWATT OUTPUT INTO 8 OHMS: 15HZ TO 20KHZ
    • S/N RATIO: 78DB (UNWEIGHTED) BELOW FULL 2.83V RMS OUTPUT INTO 8 OHMS