you people must treat your IEM;s like trash; seriously... I wear mine on average about 4-6 hrs a day and I have no issues whatsoever. i've now had them for about 6 months; the cable is still perfect, I have dropped them a onto the ground not hard or from great height but still dropped them; also have accidentally left them plugged into my computer and grabbed them as if they were connected to my pico still no problem; I didn't yank hard or anything and noticed just before I reached the stress point but still. I only use the case if i'm travelling; the rest of the time they are hanging around my neck. initially I used to just hang them there but since they dropped that time, I now have my head pushed through the cable; that is I push the cable adjustment thingy all the way to the end near the drivers; then I put my head through the resulting loop with the IEM's behind my head, then I tighten the cable almost like a noose and put them in from behind my head/ears as normal and tighten again for fit. this has turned out to be a great way to wear them. I dont even have to think about them now; I just take them out and let them hang there. you people who wear them at the gym and then wonder why they get stuffed up amaze me. no I dont abuse them LOL thats classic just because you dont bash them against stuff or stand on them daily, doesn't mean it isnt abuse. sweat/moisture is the worst enemy an IEM can have and an hour each day!!! please. you are just lucky shure has such great after sales warranty and service; many companies would have stopped replacing you IEM's after the first time.
and to the OP 100% volume will be fine. a line out after all is exactly that 100 percent volume and not going through the amp. in daps an amp doesnt increase volume; it attenuates it. so through a line out (the highest quality setting available in daps) it is always at 100%