Originally Posted by mark5hs
Koss Porta Pro are the best you can get at its price point. Besides that though, I wouldn't get anything else under $50. There just aren't that many good headphones for that cheap. Most will break, and if a $50 headphone breaks and needs to be replaced, you might as well have spent $100 to begin with.
I strongly disagree. That might have been true years ago. By todays stantards Porta Pro's are only slightly above average in sound quality for it's price. I like them with grado pads but on stock form those are disappointing. Porta pro's have slow bloated bass, recessed mids, no soundstage and lack detail on all frequencies. One of my favorite cheap headphones, Takstar HI2050 can be had for less than $50. Hinges are aluminium, pads velour and overall build quality is excellent. Digitech pro monitors are 50$ and are build better than most 150$ headphones. Both of these headphones sound a lot better than porta pros. There atleast dozen headphones priced similarly to porta pros which out perform the kosses. Most of those are full size headphones but Porta Pro's are not that great even as portables. Atleast jvc ha-s400, CAL! and fa-004 clones sound better.
As for other headphones mentioned in this thread:
Sennheiser HD 439 (Refurbished for $50) Too big for portable use
Superlux HD668B/661/681 Too big for portable use
JVC HARX900 Too big for portable use
ULTRASONE HS-15 I doubt headset is what you want
Sony MDR 7502 Nothing to say about these, but if these were good there would propably be more reviews available
Audio-Technica ATH-M40 If you mean ath-m40fs it has 6,5mm plug so wont work as portable
Panasonic RP-HTF600-S These could work, but are quite bassy and highs and mids are quite smooth/veiled so might not be what op wants
Koss Portapro ---
UE4000 This has mids and highs of a subwoofer
CAL! These could be what you want. Warm, fun and quite bassy so if you want more clarity on highs and midrange you have to keep looking
JVC ha-s500 Never heard these but JVC has-s400 is excellent so don't cross these of the list
If you are not comfortable with iem's you might want to look into jvc ha-s500 and s400. Propably s400 suits you better because it's is supposed to be less bassy than s500. Cal is great but like I said it's quite colored. Also look around for good deals on sennheiser PX 100-II. I have not heard it but it might be what you are looking for.