Try to put hd600 grills on hd580. In my experience the stock plastic grills sounds bright and grainy.

Any comparisons against the DT150? After reading this thread i have a feeling they sound somewhat similar.

Yeah, there's two types of ear pads, the ones sennheiser sells now is different (stiffer) than the older type of pads (softer).

I have old pads from my hd580 and they're softer and compress more on your head, it sounds warmer, bassier and darker. I bought some new hd650 pads and they are indeed different (much stiffer, sounds brighter overall). They need some break in time to sound good.

I'm talking about the precision hd580 (made in ireland, black screen), mine are modded with hd600 grills and hd650 cables.

I was curious about the hd650 but all this talk about the harsh upper mids made me reconsider. I have old hd580 and they're a bit too forward around 2-5khz, which makes some female vocals sound shrill and eletric guitars are kinda bright. That's why i prefer my ad2000 and dt150 over the hd580.

My portapro is 13 years old and still works, i bought a ksc-75 and the left driver died in one week lol.

Beyerdynamic DT150, underrated Headphones IMO, some people say it sounds like a closed hd650.

I also have a hd580 (3rd gen) too. Do u think the hd650 is a step up in sound quality? I'm using hifimediy u2 async (dac) + smsl sapiii (amp) with my hd580, I'm not sure if it's good enough.

  Yep, it tames the bass hump as well.   The stock pads is more dry sounding, distant, bigger soundstage and somewhat more dynamic with bigger bass. Velour pads sounds more warm and intimate, less bass hump and treble, sounds more like a Sennheiser headphone.   I haven't decide yet which...

There's a 5khz peak followed by a dip until you get to another peak at around 8-10khz, thats why the treble sounds papery. The treble doesn't sound thin if you use DT100 velour pads, it kills the treble peaks and sounds warmer. The HM5 velour pads sounds very bright and thin though, i don't...

I'm using the dt100 velour pads without the foam, that thick foam kill the highs a bit too much.

fraqsea          

Best combination is ksc75 drivers + PortaPro headband, clip ksc75 is too bright for my tastes.

Finally got my dt150! The headband has this weird shape, it was hard to get a good fit out of it, definitely need some time in your head to settle in. The cable on the right side is also a bit strange.   The sound is pretty good overall, very impressive for a closed headphone. Bass is bit...

Holy ****, best shure mod i've seen! My srh440 just broke (the thing that holds the cups just broke and there's no sound in the left side).

  Interesting, i have the k240mkll and was thinking about the hd650 but not sure if it's worth the cost. Do you use the k240 with the pleather or velour pads? Because u get more bass and the mids sound a bit closer (more intimate, depth) with the velours, it also sound less airy overall. Maybe...

Can anyone compare the hd650 vs hd518 or maybe the akg k240? Someone said the hd518 is like a poor man's hd650.

Can anyone compare the dt150 vs shure srh840?

The cheap cable i got from ebay definitely changed the sound of my hd518 for the better, it sounds a bit more clear and airy now, the bass is slight better too.   I got the same cable for my akg and shure headphones but i don't think i noticed any difference, if there's a difference it's very...

  Not the best pic but here we go  

Get the hm5 pads. My srh440 is heavily modded, hm5 pads, acoustic foam inside the cups (reduce harshness, resonances), some front damping, amazing sound.

I found out the hd518's sound change quite a bit depending on headphone positioning in your head and ears. I thought it was burn in at first, but i was like "there's no way a simple burn in could affect the sound that much" so i tried fiddling with the headphone for a bit and finally found the...

I have the hd518 and did the mod mentioned in this thread   http://www.head-fi.org/t/595120/the-sennheiser-hd518-it-just-needs-to-gain-some-weight   Wow, the sound did improve quite a bit, the bloated bass is now better, the smearing i was hearing is not that bad anymore, mids sounds...

mh1's treble is awesome, very linear, smooth and crazy extension.