I have a budget for a headphone around $300. I'm pretty new to the audiophile world minus some low-fi gears. I have seen some reviews on some $300 cans(NAD viso HP50, PSB M4U1) that they sound the same with and w/o an amp. On the otherhand, there is the mad dog, which requires an amp.
These cans are all in the same price range. And reviews seems to show that they all have close performances. I'm confused about this point. Why should I bother buying an amp for headphones at this price range if I can get cans that don't need them and do just as well?
I'm looking for a closed full size headphone with neutral bass and treble(most accurate to the source). I want the best value for my money in terms of comfort, isolation and sound quality. I'd like to think that cans with amps would be what I need and that the mad dog fits this bill. Is correct?