LittleDot MK IV headphone AMPs

LittleDot MK IV headphone AMPs
* The MK series is the new generation of Little Dot amplifiers, and the MK IV is the flagship of the line. Superior performance with much higher stability and reliability, the MK series trumps our previous amplifiers in nearly every category!
* Vacuum tubes are subject to availability, so please inquire as to the current included “stock” vacuum tubes if in doubt. Little Dot reserves the right to substitute equivalent, equal-value tubes in the case “standard” tubes are not available.
* Available in either 120VAC or 220VAC
* MK IV: $289 plus $45 shipping to the USA, Canada, Australia, most of Asia
* MK IV: $289 plus $51 shipping to most of Western Europe
* MK IV SE: $389 plus $45 shipping to the USA, Canada, Australia, most of Asia
* MK IV SE: $389 plus $51 shipping to most of Western Europe
* Please inquire for other destinations.
* Additional Tube Sets: TBD
* 1 Year Warranty (MKIV), 2 Year Warranty (MK IV SE)

The All-New Little Dot MK IV is our flagship headphone amplifier/pre-amplifier in the Little Dot MK-series. Boasting a SEPP (OTL) in Class-A circuit design filled with high quality components such as an ALPS-27 potentiometer, Nichicon, Rubycon, and German WIMA/ERO capacitors, the Little Dot MK IV is truly our best effort yet. Regardless of whether your headphones are 32 ohms or 600 ohms, the Little Dot MK IV can drive them easily with effortless dynamics (45Vp-p!) , subterranean bass, cavernous soundstage, and precise 3-D imaging.

The Little Dot MK IV also adds in user-tweaking options such as two gain switches to delivery maximum compatibility with all your headphones, regardless of impedance or sensitivity. Also available for the very first time in a Little Dot amplifier, is an internal jumper to allow use with a wider range of driver tube-rolling, including the EF92, CV131, WE403A/B, GE5654, M8100, CV4010, EF95, 6JI as well as all equivalents, derivatives, and direct replacements to these vacuum tubes!

Technical Specifications:

  • SEPP (Singled-ended Push Pull) OTL in Class-A
  • Frequency response: 10 hz~100 Khz (-1dB)
  • THD+N: 0.1% (100 mW @ 300 ohm)
  • Power Output:
  • 500 mW @ 300/600 ohm
  • 300 mW @ 120 ohm
  • 100 mW @ 32 ohm
  • Power Consumption: 30W (228V x 0.133A)
  • Variable Gain: 3,4,5, or 10x
  • Recommended Load Impedance: 32 ohm~600 ohm
  • Input Impedance: 50K ohms
  • Pre-Amplifier Output Impedance: 600 ohms
  • Pre-Amplifier Gain: 3-10x (also controlled via gain switches)
  • Pre-Amplifier Voltage: 10V RMS
  • Pre-Amplification circuit includes both driver and power tubes
  • Driver Tubes: 2x JAN 5654 (MK IV) or 2x M8100 (MK IV SE)
  • Power Tubes: 2x Soviet 6H30EH (MK IV) or 2x 6H30PI Gold-Pin (MK IV SE)
  • High quality aluminum chassis
  • Neutrik Headphone Jack (SE version only)
  • American CMC/Van Den Hul RCA Jacks (SE version only)
  • Dimensions (Metric): 320mm deep by 220mm wide by 143mm high
  • Dimensions (English): 12.6 inches deep by 8.66 inches wide by 5.62 inches
  • Weight: 3.5 Kg or 7.7 lbs
  • 1 Year Little Dot Warranty (2 Year Little Dot Warranty for MK IV SE)

Power Cord Note: Little Dot amplifiers ships with a standard Type-B power cord (American 3-pin or U-ground) suitable for use in areas such as North America, Japan, Taiwan, etc. If your country’s outlets use other power cord types (ex. Schuko) you will need to provide you own power cord. You likely have several spares around your home, as any standard power cord (like your computer’s power cord) will work perfectly fine. We do apologize for any inconvenience!

Please note that the photos shown are from both the Little Dot MK IV and the Little Dot MK IV SE. The appearance of both versions is virtually identical with only the following differences:

  1. SE version has label “Little Dot MK IV SE” instead of “Little Dot MK IV” on the front panel.
  2. SE version has Neutrik-branded headphone jack
  3. SE version has American CMC or Van Den Hul branded RCA jacks
  4. SE version ships with different driver and power vacuum tubes

Note: Photos are for illustrative purposes only. Please refer to the product description for the most explicit and up-to-date specifications, components, parts, tubes, accessories, etc.
MK 4 Front Panel

MK 4 Front

MK IV SE Power Tubes

MK IV SE Tubes

MK IV SE Tubes




MK IV / SE Capacitors

MK IV / SE Jumpers and Gain

MK IV / SE Mallory Capacitors



MK IV SE 6H30Pi Power Tubes

MK IV SE Neutrik Locking Headphone Jacks


6 Responses to “LittleDot MK IV headphone AMPs”
  1. komebudu says:


    Wow… very high quality components used..!! Hoping being able to audition this equipment here in Malaysia…

  2. Tom says:

    Where can you order these online?

  3. Mitch Reeves says:

    How can I purchase a 110 volt mk iv headphone amp

  4. BlueFrost says:

    I can only echo the pre-eminent question everyone has been asking: WHERE CAN WE BUY the Little Dot MkIV???

  5. BlueFrost says:

    For all: If you haven’t already (althrough there are other reviews) check out Sam Tellig’s glowing remarks regarding the Little Dot headphone amp in this issue of Stereophile.

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