Feliks Audio

Echo Mark II

The Echo Mark II OTL Headphone Amp is an output transformer-less (OTL) headphone amplifier and preamplifier featuring  6N6P and 6N1P tubes. Despite being Feliks’ entry-level amplifier, the Echo is no slouch when it comes to presenting a highly musical and well-extended sound. The Echo is slightly warm, smooth, intimate, and laid-back, flattering a wide range of headphones.

These qualities, in addition to incredible build quality and brilliant engineering, amount to an amplifier that performs far beyond its class. It is fully handmade and the headphone sweet spot is for medium to high impedance headphones (from 100 ohms). It can also be used as a tube preamp for both tube and solid-state amplifiers.


  • Incredibly detailed presentation
  • Very low noise levels and AC interference
  • Broad frequency response, 15 Hz to 45 kHz +/- 3 dB
  • Gold-plated ceramic tube sockets
  • Input and output safeguards eliminating power on / off noises
  • Wooden, solid oak side panels
  • Extended 3-year warranty
  • Custom-made stabilized toroidal transformer with electronic ripple suppression
  • Automatic bias circuit, so no tube re-biasing needed 


    • Tube complement: 2 x 6N6P, 2 x 6N1P
    • Frequency response: 15 Hz - 45 Khz +/- 3 dB (300 ohm)
    • Input impedance: 100 kOhm
    • Power output: 350mW
    • Headphone output: 6.3mm



    • Beautifully hand-crafted tube amp
    • 1 pair of driver tubes
    • 1 pair of power tubes
    • AC cord
    • User manual
    • Warranty card


    If not in stock, 5 week delivery time from date of purchase. 

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