/nod, the Mjolnir 2 has that switch for SE and balanced in, so I'll be trying both at some point, eventually sending the Bimby to Dad if the Yggy sounds more pleasant. That written, for me at least, I think that digital glare, repetition, and aliasing patterns that grate on my nerves is hard to hear in a simple A/B test, but I am guessing my brain registers it, filters it, but still leaves me feeling fatigued. I don't get that sense of fatigue at live events, and tubes have helped, as well as headphone choices, to alleviate that feeling of something is wearing me down, often quickly. For whatever it worth, there is a really good website that hosts 3 files to demonstrate MP3. There is the original Tom's Diner, no compression. There is the compressed version, and there is the diff version. If you listen to the diff version it's clear what has been removed. Problem is if I compare the uncompressed version with compressed version, I admit, I really cannot hear the differences consciously (maybe to a minor degree, but not reliably). Our human psycho-acoustics hearing really just is for most of us. Problem is if I listen to the full song, compressed vs not-compressed, many times over, one leaves me fatigued, the other does not. I have a very 'prove it to me' kind of mind, and well aware of the placebo effect, but I'm also open to the possibility that while we cannot consciously hear something, our brains have to work harder to sort through the noise, artifacts, etc, which leads to fatigue vs 'that just sounds amazing!'