ChisChas
100+ Head-Fier
I'm guessing you have (or want) a Utopia headphone cable that terminates in 2.5mm balanced, and an adaptor to use it with the Hugo? One of the various cable makers will either have an option or can make something for you. Do NOT try Amazon. The adaptors they sell are not what you're looking for and will damage your QP2R.
Here's the end of one of my headphone cables from Moon Audio, terminated with a 2.5mm balanced plug, alongside two "ultra short" adaptors from Norne Audio, which allow me to use it with other amps.
I am using a Balanced cable on loan from Atlas Cables/SCV with a 2.5mm termination for my QP2R but without an adapter so I'm having to change to the Focal cable when I want to use my Hugo 2. The adapters you have shown in your photo are similar to the 3.5mm to 6.3mm one I have and thank you for highlighting the dubious quality of the Amazon offerings. Custom Cans was recommended to me yesterday and looking at their website I believe they will be able to help (or Audio Sanctuary). I only need a 1m Balanced cable (+ adapter) for both QP2R & Hugo 2 use and I really like Atlas Cables cables (I use one with my K812's). The Utopias are a great temptation particularly as their comparatively undemanding nature means they can be driven well by my QP2R, better by the Hugo 2. My New Year's resolution was to go on spending vast sums on hi-fi, wasn't it? Oh dear, I used to just to be really into my main hi-fi system but now I've caught the headphone bug............Je suis perdu (I am listening to the lovely Lara Fabian singing 'Aimer Deja' in French from her album Nue, recommended by Headmania in his LCD-4 review).