First of all, you can find AH-D310 online for as little as $32, which makes them a very good deal. Possibly better than some $50-70 headphones, even. The "R" version has a microphone and IPod control, it's a bit more expensive, but worth it if you need that.
Pros: Warm. Fast dynamics, sensitive/loud, bright and airy enough for closed, good for weak players/phones. Great value as mobile phone headset.
Cons: Too bassy, sometimes honky, cups too small. "Asian midrange" bug (~220 Hz range sagging).
Excerpt: Construction is solid plastic with an extending padded steel headband; tight earfit aside, they were comfortable to wear, while the three-button remote plus mike allows handy control of volume, play/pause and last/next track selection.
Summary: Denon sells the AH-D310 for a price of Rs. 2,990 in India. The product as a whole is a decent package, but when it comes to pure performance, there are much better options available for roughly a thousand rupees more.
Excerpt: Denony zwracają uwagę nietypowym kątem składania nauszników oraz kształtem pałąka. Projektanci chyba zainspirowali się kształtem głowy Buki (tej z „Muminków”), ale nas interesuje to, że AH-D310 dobrze dopasowują się do czaszki słuchacza.