Being young doesn’t really matter as you can also damage your hearing if exposed to loud sounds, but I digress.
Regarding channel imbalance. If your amplifier uses old school potentiometers channel balance is certainly a thing. So you indeed need to test that imbalance with other sources.
Also I have been enjoying music since my teens and I’m now in my forties, imbalance with headphones was a pretty rare thing for me, as for IEMs besides the rare QC thing I never had that kind of problems.
I know it’s a long shot but you should test your amplifier section for DC offset…most amps filter it but one is never too cautious as it can ruin gear.
Being young doesn’t really matter as you can also damage your hearing if exposed to loud sounds, but I digress. Regarding channel imbalance. If your amplifier uses old school potentiometers channel balance is certainly a thing. So you indeed need to test that imbalance with other sources. Also I have been enjoying music since my teens and I’m now in my forties, imbalance with headphones was a pretty rare thing for me, as for IEMs besides the rare QC thing I never had that kind of problems. I know it’s a long shot but you should test your amplifier section for DC offset…most amps filter it but one is never too cautious as it can ruin gear.