• Quietly amplifying since 1994
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Tuba - Vacuum Tube Headphone Amplifier

$ 659.00

The TUBA is a world-class vacuum tube headphone amplifier designed to operate with either low impedance (Grado) or high impedance (Sennheiser) headphones. The power stage is a single-ended parafeed EL84 triode into an impedance matching transformer, offering very low distortion and huge signal headroom. An internal switching power supply boosts the 15Vdc input by a factor of ten for B+, after a 30 second warm up delay. The amplifier is conveniently turned on and off by pressing the volume knob inwards.


  • 10k ohm input impedance
  • 14 ohm output impedance
  • 10Hz to 150kHz bandwidth (-3dB)
  • 400mW output power @ 32 ohms
  • 6Vrms output voltage
  • 6 x 10 x 3.5 inches
  • 15Vdc @ 1.35A
  • EL84 x 2