Seriously, I have seen a lot of people asking about this. I have bought my A845 in Portugal as well, and I use 10/30 with the stock IEMs. es, the darned thing is capped, but the maximum volume is more than enough to pierce through normal eardrums. I am serious, why do people complaint so much?
Either you have headphones with a very high impedance, thus creating a big imp. mismatch, in which case more volume would still not solve the problem, since it would still degrade the sound quality;
Or you have low-sensitivity headphones, in which case I'm sorry, but an amp would be needed just like in the case above;
Or, as I suspect, you got used to loud volumes, which is kind of ironic if you're using an active noise-cancelling DAP, and have hearing problems, in which case I would recommend a doctor and not an amp or a different DAP.
I am not exaggerating when I say that volume 30 on my capped A845 with the stock IEMs would literally hurt my ears.