I needed this info a while ago. The wiring coloration (or lack of it) made the whole process a bit more time consuming than necessary, but I found that little colourful diagram that @MIKELAP posted to do the trick for me. This pot was a little trial-by-fire situation for an amateur solderer like...

SonicJedi, thanks so much for this detailed and helpful response. I'm definitely going to give your method a try in the next couple of days. As for the hum, I did try different outlets (and different buildings) and had only the LD plugged in. So it appears that it wasn't a simple ground loop...

Is it possible to test whether the Mk3 is working properly before I undergo the process of pushing it back into its casing? I have a hum issue that I'm trying to rectify and have taken the board out and would prefer not to have to do it again.

Just a quick update. I resoldered that loose wire with no change to the humming sound. I also received some new driver tubes and put them in: no change. I'm still waiting for some new power tubes before I decide whether I want to pull the thing apart and have a look (with the eyes of an amateur).

I will, thanks.

That's good to know. Where did you introduce the wire? Perhaps I can manage to do the same thing. I do realize, however, that the build design has changed over the years. I'm not sure which one I purchased or when the original was bought. I did touch the chassis and RCA simultaneously, but...

Thanks for checking that out. I do think that I ripped it out in the process of checking inside, but I will of course re-connect it. If the buzzing ever ends, I'll want to use the LD as a preamp as well.

Great, thanks.

That sounds like a great modification, but a bit beyond my meagre skill set. Would that loose output wire create a buzzing noise even though I'm not using the output plugs?

Yes, I will repair the wire, which I think is the signal. I'm fairly certain it was me who did it, so that particular problem post-dates my original issue.

Hello! I recently bought a Little Dot Mk III from its original buyer. I bought it knowing there was a buzzing issue, but thought that the buzzing was an easily correctable ground loop fault. However, after using a "cheater" plug and an actual ground loop isolator without any success, I am...

That's an interesting solution. I myself am having a humming issue which I haven't been able to eliminate with a cheater plug or a ground loop isolator. I have some new tubes on the way just in case, but am wondering if what I'm hearing is transformer noise. My next step would have been to open...

Have you found a solution to this problem, or are you experiencing the same issue? I'm afraid I'm not too savvy either, but am curious whether the noise is coming from the unit itself or through the headphones/speakers.

Thanks for the input, The amp would predominantly be used while moving about. I have a full-sized amp, DAC (CA DACMagic100) and speaker setup that I'm happy with and which doesn't involve the X1 when I'm at home. I'll doubtless improve my gear in the future. I was just wondering if a small...

Yes, it's true that the Q1 is also an external DAC. This would theoretically be an added benefit to be used with a laptop, in addition to its amping capabilities. I don't intend to bypass the X1 DAC.

Hello! I'm currently using a Fiio X1 (1st Gen) along with ATH-M40 headphones. I am wondering about the possibility of adding an amp between them. I never max out the volume when listening to music. Would adding the Fiio A3 or Q1 add any perceivable benefit in sound quality? Does anyone use this...