[zxcv4306]

Does anyone know a pair of headphones that has little more bass than K501 but still retains its openness and midrange sound?

 

[tdockweiler]

I don't think there's anything else out there like the soundstage of the K501. Not even the AD700. The closest match is the K601. I've found it has much more bass than the K501.
 
One thing you can do to give the K501 a little more bass is to try the K601 pads. It seems many people do this for their K400.