You had: Device -> HeadphonesYou now have: Device -> Amp -> HeadphonesWas the amp really necessary? You're gaining no audio quality from it. Amping IEMs might even damage them or your ears. They're designed to run with very little electricity, as you'd expect for something that is inserted into the ear canal.
The 75 dB limit is being imposed by the GUI. The command-line app that the GUI is invoking doesn't have this restriction.Sound quality is unaffected by applying gain reductions, except in a very unusual situation which isn't worth explaining here.
Was the amp really necessary? You're gaining no audio quality from it. Amping IEMs might even damage them or your ears. They're designed to run with very little electricity, as you'd expect for something that is inserted into the ear canal.
To the OP, I'm a little unsure of how you can't turn the volume below something that's uncomfortable for your ears which seems to be what you're saying?
Instead of messing with your files, why not adjust the software volume? You can either turn down the volume of your player or the operating system.
Well, I think that is really a subjective thing
and not the point of this thread.
I've seen plenty of people on head-fi using IEM's with portable amps, and I don't want to argue about whether there's a benefit in doing that or not.
I was a bit unclear in my original post, but the reason I had to reduce the volume on my mp3 files (the source) is because the amp had too high of a gain and therefore even the minimum volume required to get out of channel imbalance was too high for me.
I'd still like clarification on whether reducing gain with mp3gain will damage the quality of files (as 2Bdecided mentioned, does it reduce sample size and why?[…])
Is it reversible?
Yes. All MP3gain does is to add a field to the MP3 file that instructs the player to scale it by ReplayGain’s computed gain reduction/increase, rounded to the nearest 1.5 dB. This can be reversed simply by reverting the scale-factor to zero.