My first full size set of cans
.
We still have them - although they are for the kids now as I've moved up the chain just a little.

Overview
The Sennheiser EH-250's are a closed supra-aural headphone, which are very lightweight and portable.
Tech Specs
[td] Jack plug[/td] [td] 3,5/6,3 mm stereo[/td]
[td] Nominal impedance[/td] [td] 32 Ohm[/td]
[td] Weight w/o cable[/td] [td] ca. 130 g[/td]
[td] Transducer principle[/td] [td] dynamic, closed[/td]
[td] Ear coupling[/td] [td] supraaural[/td]
[td] Cable length[/td] [td] 3 m[/td]
[td] Frequency response (headphones)[/td] [td] 14.....19000 Hz[/td]
[td] THD, total harmonic distortion[/td] [td] <0,2 %[/td]
[td] Sound pressure level (SPL)[/td] [td] 112 dB(SPL)[/td]
Above was from Sennheiser's website
Build/Comfort
The build is very good. They are lightweight, and the only real sign of wear from 4 years of constant use is some paint chipping off the headband. The cables are replaceable - we've had to replace once due to a broken wire. They are very comfortable to wear - initially. The headband is extremely well shaped and soft. The pads are also extremely soft, and if you don't mind supra-aural cans - they should be great for you. I found that after about 2 hours - they began to get quite painful. If the pads were slightly larger (and circumaural) for me they would be fantastic. They are not foldable, but the cups swivel slightly allowing good positioning for comfort.
Isolation / Clamp
These have a really good clamp on them - possibly contributing to my ear pain from the cushions over time. They isolate exceptionally well - and would be great for portable use.
Sound
When these were my only can, I thought they sounded absolutely awesome. As I was exposed to more cans, I slowly realised that while these provide good sound, they do not provide great sound.
The mids are warm, and the highs are actually quite nice - although not extending very far. The freq spectrum I would definitely say is V-shaped (emphasis on bass and treble). They are clear without being overly detailed. The biggest issue with them is the bass. it's definitely there, but it is not defined. It's punchy but overall a little boomy and sloppy. It doesn't overpower as much as the low Beats (also has better definition) - it's just not what I now expect from my cans.
They are a 'fun' sound rather than an accurate one.
The kids however think it is great - and we will probably buy something similar (HD203) so they each have their own set of cans.

Conclusion
The equiv $65 US I paid was NZD converted, and headphones are expensive in my part of the world. I think the equivalent model (maybe slightly better drivers now) for these is the HD203 - they look the same anyway. The EH-250 would be ideal for entrants to mid-fi looking for a portable can with a warm, bassy (thumpy) signature. They're also ideal for kids - being a cheap option.
If you're looking for bass definition - look elsewhere. If it's just bass quantity and portability on a tight budget - these could be exactly what you need.

We still have them - although they are for the kids now as I've moved up the chain just a little.

Overview
The Sennheiser EH-250's are a closed supra-aural headphone, which are very lightweight and portable.
Tech Specs
Above was from Sennheiser's website
Build/Comfort
The build is very good. They are lightweight, and the only real sign of wear from 4 years of constant use is some paint chipping off the headband. The cables are replaceable - we've had to replace once due to a broken wire. They are very comfortable to wear - initially. The headband is extremely well shaped and soft. The pads are also extremely soft, and if you don't mind supra-aural cans - they should be great for you. I found that after about 2 hours - they began to get quite painful. If the pads were slightly larger (and circumaural) for me they would be fantastic. They are not foldable, but the cups swivel slightly allowing good positioning for comfort.
Isolation / Clamp
These have a really good clamp on them - possibly contributing to my ear pain from the cushions over time. They isolate exceptionally well - and would be great for portable use.
Sound
When these were my only can, I thought they sounded absolutely awesome. As I was exposed to more cans, I slowly realised that while these provide good sound, they do not provide great sound.
The mids are warm, and the highs are actually quite nice - although not extending very far. The freq spectrum I would definitely say is V-shaped (emphasis on bass and treble). They are clear without being overly detailed. The biggest issue with them is the bass. it's definitely there, but it is not defined. It's punchy but overall a little boomy and sloppy. It doesn't overpower as much as the low Beats (also has better definition) - it's just not what I now expect from my cans.
They are a 'fun' sound rather than an accurate one.
The kids however think it is great - and we will probably buy something similar (HD203) so they each have their own set of cans.

Conclusion
The equiv $65 US I paid was NZD converted, and headphones are expensive in my part of the world. I think the equivalent model (maybe slightly better drivers now) for these is the HD203 - they look the same anyway. The EH-250 would be ideal for entrants to mid-fi looking for a portable can with a warm, bassy (thumpy) signature. They're also ideal for kids - being a cheap option.
If you're looking for bass definition - look elsewhere. If it's just bass quantity and portability on a tight budget - these could be exactly what you need.