I have both and i'm not able to find any sonic difference. 

 I would tell you to try another unit. I have a K550 from long time ago and never experienced such ringing. I mainly listen classic music, progressive rock, some vocals, and some classic rock.    For amping the K550 i use almost everything, from a Sansa Clip, X3, Topping TP D1, Matrix M-Stage..

My vote goes for AKG Q701. 

Mi wife made for me the following mod for the Q701. The mod is fixed with Velcro(c) and can be removed for washing very easily. Now i can wear the headphone for hours without any uncomfort.  

Hi n0str3ss.   I use them every day, and for me they still are an amazing bargain. I've compared them with the GR07 face to face,, and, may be the GR07 is a bit more precise (you have to look for subtle details to notice the differences) and equilibrated. Bass notes have more impact in the...

I've just received my VSD1 SE, and the first impression is just amazing, they seem to me much better than the VSD1S, much more extension, bass is fast and tight but no overhelming, treble is more present than in VSD1S,, cimbals, for example sound amazing not only for an iem for this price, they...

Thanks n0str3ss, but i think that the misunderstanding was mostly due to my awful way of expressing myself, probably a better positioning of the "still" word would made things clearer. Anyway, as soon as i receive the order i'll post my impressions. 

Not at all, i'm aware you menctioned that web many times, my post was only to confirm that this morning they still have stock for the VSD1 SE, and that i've just ordered mine a few minutes ago.

  Yes,, i read carefully all of them, as they are quite informative and interesting,, 

  As far as i know, driver is quite different from VSD1, you can compare specs form GR07 and VSD1 SE, and see that they are identical, except impedance. In fact, VSD1 driver is rated as dynamic driver, and VSD1 Driver is rated as High Dynamic Driver (like GR07). In a two days i'll receive my...

  You can order the VSD1 SE (they still have stock) at Spanish web headphoniaks, in fact, i've orderer mine yet.    http://headphoniaks.com/es/auriculares/71-vsonic-vsd1-special-edition.html

K550 hands down. It looks like you need a good soundstage and M50 sounds terribly closed.

Takstar Pro80, a closed headphone, with a lot of bass, and an atonishing sound quality. For a open headphone, with also quite bass, and a very good sound, look for Somic MH-463.  

Take an eye on Somic MH463, a open headphone with much better stage and positioning than the (more or less) closed Aurvana. Bass is also quite present at rhe Somic. 

Takstar Pro80,, for me, much better than CAL. 

I didn't take any pic, but mine broke exactly in the same way as this ones, just above the hinge.    http://i43.tinypic.com/9vcto0.jpg

Quote: Same here with my K67, they lasted three months until broken. Fortunately Amazon accepted a return. I don't understand how AKG is selling such a low quality product. 

Isolation: even,, and none of them excels in this aspect. Detail, SQ, Comfort, : Pro80. Build Quality: Pro 80 by a huge difference, moslty metal (aluminum and magnesium) vs fine plastic on the Senn..   For the genres you menction i would go for the open version of the Pro80, the HI2050...

Thanks MrEleventy.

double post.

In a nutshell, HM5 is quite treble light, more or less on the "dark side" and Pro80 is much, much brighter. Bass is quite good in both of them, with more extension on the Pro80. Both have a very good middle range, but with the Pro favoring male voices.

Still Enjoying ? They are addictive !!, It is one of funniest headphones i've heard. I've more than 30 headphones, some of then very expensive (AKG. Senn, Sony) and these are still one of my favorites.. They sound simply amazing. As you say,, they put a smile in your face. 

For me, the stocks pads are great. They are smooth and quite comfortable. 

Same here, mine broke after only three month of use. Fortunately Amazon gave my money back. 

Quote: You can buy them for 130 Euro (may be plus 8 euro for shipping) at Amazon.es