[SP Wild]

55 mm drivers do not need separate mid and treble drivers to make bass...more about a sealed baffle via a good earpad seal - to retain generated pressure.  Simple mechanical systems of an air pump that's all it is.

 

[Hawaiibadboy]

  55 mm drivers do not need separate mid and treble drivers to make bass...more about a sealed baffle via a good earpad seal - to retain generated pressure.  Simple mechanical systems of an air pump that's all it is.

need 

 
I love that word. 
I'm sure I didn't use it though.
 
I was responding to the OP and his thread title. I wanted a dual driver over ear and I found it it.  (nobody mentioned this when i asked the question)  55mm is a nice size and this one is surrounded.reinforced  and equipped to drop the freq via 2 chambers. That is .....right down my bass alley.

 

[grizzlybeast]

After checking around the corner for portables the one I miss the most is
 
Focal Spirit Pro:
I would make the cups a little larger to cover the ears
the sub bass a little stronger
 
ThatS IT

 

[Poetik]

HD800 looks, comfort, sound, but with planar bass.

 

[dakanao]

Shure SRH-840 with larger soundstage, way more bass and better imaging/separation. That would be my ideal headphone.

 

[Claritas]

  Shure SRH-840 with larger soundstage, way more bass and better imaging/separation. That would be my ideal headhone.

 
Interesting. I think the soundstage is accurate when it comes to position, but you're right that it's a little congested. Regarding bass, I know there's a mod for SRH440; maybe it works for 840 too.  

 

[dakanao]

   
Interesting. I think the soundstage is accurate when it comes to position, but you're right that it's a little congested. Regarding bass, I know there's a mod for SRH440; maybe it works for 840 too.  

3 or so people said that the Shure-SRH 1540's have what I'm looking for. More bass than the 840's, while being more refined overall and still retaining that engaging sound signature.