This is a review of a pair of free IEM's I recieved from DUNU as part of a give away contest they recently held here on Head-fi.
When I recieved my package the first thing I notices was...
Best closed headphones I had heard - very flat response, almost no midrange distortion, very easy to drive (good for portable), good soundstage (definately better than K240), good isolation, but...
Overall excellent buds, very good sound quality, especially for their price, the medium set of tips fits exactly in my ears and provides a near perfect seal. Bass is very detailed, but not...
I'll keep this very short. They are very smooth sounding. Treble toned down so not so good for rock but have a magic about them that makes them better than mark 2. I use them with a '89/'90...
Many people think the HD558 with a Zalman mic is quite good.. Myself personally, I prefer a closed headphone instead. I am spending my money on the PC350 as it has a built in mic. What kind of soundcard do you have?
The foam mod? I read it increases bass but the mids are highs get a bit muddier.
Mike @ headfonia says the mids actually get slightly better than on the 598s with the mod...bass is obviously increased but nothing gets worse than it already is. foam / tape mod is the same thing. The mod is completely worth it. HD-598s still have more detail and soundstage though and benefit more from a good amp than the 558s.