Little Dot

Little Dot MK2 Tube Headphone Amp


What Makes It Special

  • A "classic" tube headphone amp that has earned a solid reputation as a reliable workhouse that offers the ability to customize to the listener's desires
  • Changeable tubes with an extensive community around comparing which tubes work the best for different preferences (see Head-Fi thread)
  • Reliable and built with quality with large numbers of happy owners of the MK2 and other Little Dot products

Our Thoughts

The Little Dot MK2 has been around for what feels like a long-time now and it is still considered one of the best tube headphone amps for its price. Its popularity can be seen through the extensive number of reviews and discussions around the MK2 and Little Dot products. In particular, there are and continue to be, extensive discussions around tube rolling and customization of the MK2.

The Little Dot MK2 Tube Headphone Amp is a true "classic" tube headphone amp and it continues to be a great choice. 


  • Little Dot MK2 Tube Headphone Amp
  • Power Supply / AC Adapter
  • (2) 6J1 Tubes
  • (2) 6N6 Tubes


  • Input: Gold-plated unbalanced phono (RCA) jacks
  • Output: ¼ in gold-plated stereo headphone out
  • Frequency response: 20 Hz – 50 kHz (-1 dB)
  • THD+N: 0.1% (50 mW into 300 ohms)
  • Suitable headphone impedance: 32 – 600 ohms
  • Input impedance: 50 kohms
  • Preamplifer output impedance: 600 ohms
  • Preamplifer gain: 3 – 10x (also controlled via gain switches)
  • Preamplifer voltage: 10 V RMS
  • Maximum input voltage: 4 V RMS
  • Preamplification circuit includes both driver and power tubes
  • Power output: 300 mW into 300 ohms, 200 mW into 120 ohms, 100 mW into 32 ohms
  • Power consumption: 28 W (228 V x 0.12 4A)
  • Dimensions: 8.3 x 4.3 x 4.2 in (21 x 11 x 13 cm)
  • Weight: 5.5 lbs (2.5 kg)

Professional Product Review of Little Dot MK2 Tube Headphone Amp

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