I understand and agree completely with your desire to deal with limitations in your hearing. I do the same thing. Plus I have my own taste in what I want to hear. The HD 660S actually has, objectively, a quiet bass that needs boosting. So I do that, as well as boosting some of the higher frequencies, to get what I want to hear. I'm just saying that the DAC is not the place to do that. You want an objectively neutral DAC, AMP etc and perform any manipulations in software elsewhere. The plugins/distortion thing is entirely separate. The band, engineer etc do whatever they want and come up with an end result. I want to hear exactly that, seasoned to taste given my hearing/choices.Hi, I'm having a Dragonfly Cobalt here now, and it plays well (and loud enough) with HD600 (300 ohm), HD650 (300 ohm) and DT880 (250 ohm).
'Opinion' in terms how 'how does this sound?', isn't something I'm looking for, but I have bought the Dragonfly Cobalt with an option to return it within 30 (?)days, which means that I have time to check out other options (if I can find them around here). I could spend even more time than I've already done reading myself up on reviews, measurements etc – and I will – but imagine that I could save some time by asking for advice, as in 'where should I start to look' – and several of the replies in this thread have already been helpful.
I mentioned earlier that not only are mix engineers and mastering enginerrs using plugins to emulate various kinds of distortion in order to make a mix sound 'better' – before plugins were available, tube mics, tube preamps and other analogue tricks were used to enhance (or 'enhance') recording. Whenever one of these plugins or tube/valve devices are used, distortion is added – which, if scientific tests were done, would make them look less than ideal on paper. I simple can't just/only look at measurement results and make a decision, mainly due to the limitation in my hearing. For instance, I decided to buy the 660s because they – in my ears – sounds like they had an exaggerated bass. Even if I have troubke hearing frequencies the higher they are, I seem to hear low end frequencies louder than most people. Lots of people I know, around my age (mid-60s) who have, like me, worked professionally with music/audio for decades have hearing limitation/issues and or some degree of tinnitus, so normal 'rules' don't apply when we need to make decisions about speakers, headphones etc.