Have you tried IEMs from your AIC10?
I have!
- It’s superb!
- Noise floor is just on the verge of being ok with hard loads and not so with easy ones.
- I have a passive filter adapter from Frans at DIY Audio Heaven from the days I owned a CFA3, a beast of an amp, where I used these with sensitive headphones. Of course adding any resistance has potential impact, but these are done so well there’s barely none I can perceive. With this, I can use any IEM with the AIC and it’s glorious! (a useful accessory to have in any case) — https://diyaudioheaven.wordpress.com/passive-filters/