Little Dot MK I+

General Information

The successor to the Little Dot MK I, the Little Dot MK I+ takes advantage of American National Semiconductor’s newest offerings in ultra-low distortion circuit components: LME49710HA (Gold edition) or LME49720NA (Standard) high fidelity operational amplifier and the LME49600TS high performance current buffer. The new power supply consists of two 3.7V 700mA/h Lithium-Ion battery to provide up to 30 hours of high current, ultra-low distortion power to your headphones. Circuit stability and reliability over the previous Little Dot MK I has been markedly improved as well. The Little Dot MK I+ also has exceptional compatibility with a wide variety of IEMs, earphones, and full-sized headphones due to its user-selectable three gain settings, as well as output current control via internal jumpers. When jumper caps are set in place, output current increases by 80%, dramatically improving dynamics, impact, and low frequency response with the trade-off of lower battery life.

There are two versions of the Little Dot MK I+, the Standard Edition and the Gold Edition. The Standard Edition uses the LME49720NA op-amp in the pre-amplifier stage. The Gold Edition boasts dual LME49710HA op-amps in the pre-amplifier stage for superior dynamic range and current delivery.

Technical Specifications:

* Line Input: 3.5mm (1/8") mini-stereo
* Headphone Output: 3.5mm (1/8") mini-stereo
* Frequency Response: 5 Hz (-0.6dB) to 200KHz (-0.3db)
* THD+N: 0.0010% (1V @ 1000 Hz)
* Suitable Headphone Impedance: 8 - 300 ohms
* Input Impedance: 20K ohms
* Power Output: 200mW (32 ohms)
* Gain Factor: 1, 2, 4x (User Selectable)
* Battery Life: up to 30 hours per charge
* Battery Overcharge Protection
* Universal Voltage AC Charger/Adapter included (Type B plug)
* Measurements:
* Metric: 95 mm (length) by 70 mm (width) by 24 mm (height)
* English: 3.74 inches (length) by 2.75 inches (width) by 0.94 inches (height)
* Weight: 192 g (includes internal battery)

Latest reviews

Pros: Sound quality; design
Cons: Build quality could be a little better
I bought this on the back of buying a Little Dot Mk IV tube headphone amplifier earlier last year. I was very impressed with that unit and so thought I would extend this to my portable listening kit.
I have been using it now for a few months and overall I am impressed. It is a neat little unit with an all metal case and good solid controls. I don't use it on the move so it doesn't need to fit in pockets or bags but I can imagine it would be up to the task of being thrown about a bit. The only downside is that the sockets for the headphones and audio in seem to be a little loose and can crackle when the lead moves. But for me this is only minor and does seem to be reducing with time so maybe it is just bedding in.
One of the big advantages is the rechargeable battery and battery life. I have used this almost every working day for the last few months and I have only had to charge it twice. It just seems to go on and on! I listen for about an hour a day and at reasonable sound levels so I reckon the 30 hours life per charge is about right. Battery life just is not an issue. It would be nice to have a better recharging indicator but this is nit picky in a unit at this price.
So what about sound quality? Well this is a sweet sounding amp. I am not a bass head and don't want thundering, overbearing bass but this goes low with some of the darker ambient music I listen too. At the same time it brings the vocals to the front and I find myself hearing words I am not used to hearing. It is not the last word in resolution maybe and I don't want to analyse every beat and note but the way the music is presented is clear and clean. I find I do not suffer listening fatigue and can sit for a seven hour session without feeling drained (headphones notwithstanding). That has not been true of all the equipment I have ever had!
Overall I like this amp. It is robust, truly portable and complements the sounds I am getting from my players. There is very little to dislike and at the price I think it is a bargain.
That is worrying! Maybe I should send mine back to be fixed before it gets too bad! Thanks for the feedback.
But the sound. It brings out everything and doesn't just focus on bass, treble, or mid it is all presented if it is in the music.
I have missed it and am waiting eagerly for my Fiio E12, I am one of the first 20, to try and recapture that sound....but with better build and parts.
Do let me know how the Fiio compares. I am thinking I might go for another portable amp. Especially if I do send the Mk1+ back for repair.


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