Little Dot MKII Tube Headphone Amp
Little Dot MKII Tube Headphone Amp
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Product Description
A great introduction to the world of tube headphone amplifiers, the Little Dot MKII is ideal for pairing with a desktop amp and can also function as a preamp to your speakers. It uses a single-ended push-pull OTL circuit operating in Class A, and delivers plenty of headroom and dynamic impact, along with a touch of tube warmth and tonal richness ... Read More
Made for Modding

A great introduction to the world of tube headphone amplifiers, the Little Dot MKII is ideal for pairing with a desktop amp and can also function as a preamp to your speakers. It uses a single-ended push-pull OTL circuit operating in Class A, and delivers plenty of headroom and dynamic impact, along with a touch of tube warmth and tonal richness. While its high voltage swing is best suited for high-impedance headphones, the MKII can be fine-tuned to any cans you have—from 32 ohms all the way up to 600 ohms—using its multiple gain settings. Best of all, you get to experiment with tube rolling to achieve your desired sound signature. At the factory jumper setting, this amp can roll 6JI, WE403A/B, GE5654, M8100, CV4010, EF95, and other tubes. With its jumper pins shortened, you can roll EF92, CV131, and all equivalents and drop-in replacements.

Note: At checkout, choose between power sources 110V and 220V. Additionally, you’ll have your choice of driver tubes: 6JI (base price), Jan 5654 (+ $20), or CV4010 (+ $45). For a guide on rolling tubes with the Little Dot series, visit this Head-Fi discussion.

Specs
  • Little Dot
  • SEPP OTL in Class A
  • Input: Gold-plated unbalanced phono (RCA) jacks
  • Output: ¼ in gold-plated stereo headphone out
  • Driver tubes: 6JI (default)
  • Power tubes: 6N6
  • 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)
Shipping

All orders will be shipped by Drop.

Estimated ship date is Dec 12, 2018 PT.

After this product run ends, payment will be collected and orders will be submitted to the vendor up front, making all orders final. Check the discussion for updates on your order.

Recent Activity
I would like to share my personal experience with you. I bought the HD6XX (slightly used off the eBay because massdrop still doesn't ship to me) and i was looking for a way to amp it properly without breaking my bank. OTL was highly recommended but the bottlehead crack was far out of my reach, then the next affordable match was Magni and it is absolutely impossible to get it shipped to me with tax and shipping. Then out of luck i came across the Little Dot MK2 on eBay and the brand new price was amazing. So i bought it and it came with the stock tube. For me it sounded like night and day difference with my FX Audio DAC-X6 right out of the box. It sounded so full and warm even with the stock Chinese 6J1. I would absolutely wholeheartedly recommend this amplifier to be used with HD6XX. I also thought the same question.... why arn't there many people using this combo instead far more expensive others. Before proceeding any further i must let you know that the manual that is shipped with my amplifier was incorrect, especially in the gain settings section. The correct manual is available online and i found it. I am sharing it with you. Incorrect settings on HD6XX gave me a hum. (I don't know about massdrop edition but the one that was shipped to me by eBay seller has incorrect information) https://www.dropbox.com/s/gg0mt2gi99wmt7j/LittleDot_MKII_Guide.pdf?dl=0 Next came the tube upgrade time, out of curiosity i bought GE JAN 5654W because i went through "Little dot tube rolling guide" in Head-FI and they were highly recommended there. Those were the only cheap tubes i could find on the eBay other than the 6J1 and Voshkods. Also i have some experience using this because my 6N3 Matisse Clone amplifier runs on GEJAN5670 W and the sound is amazing on that. So i bought them off and the results were very unlikely, even after 30 ~ 50 hours burn in time on my amplifier it sounded far worse than the Chinese 6J1 stock tubes. I switched them back and forth with Chinese and Russian power tubes and nothing changed. I tried burn in further more and still it doesn't work. So with my current experience i wouldn't recommend these tubes to be used with GE JAN 5654 W (Green letters, probably from 1980's). I have a matched pair of Mullard M8100 / CV4010 tubes coming on their way from England, I hope they will sound as they were described in the Head-Fi thread. I will share my experience with you once i receive them. My current set up is Laptop (Source) - > FX Audio DAC-X6 (USB) - > Little Dot MK2 with Stock tubes - > Massdrop HD6XX