I've had significant hearing loss across the full spectrum. I really can't listen to louspeakers any more, and so found myself gravitating to headphones a decade ago. Loudspeakers simply sound "hollow" to me - no lows, no highs, and midrange like it's in a cardboard box. Car speakers - commonly "hyped up" actually sound better. But headphones - while they don't sound great - I can handle with relatively "flat" (frequency) performance. I can't scientifically explain any of this, and I really haven't approached disagnosis, from a music appreciation standpoint, scientifically.