[zambz]

Hi guys, hope you're all well.
 
There's a very simple technique that is used in audio processing to narrow and widen a stereo image.  I used to use it all the time during production and even coded a plugin which did it too back when there were limited options.  The algorithms involved are simply mixing left and right channels in different ways so there's zero colouration and I personally find this technique really helps open headphones which naturally have less width (e.g. the Audeze range).
 
I would love to see what your thoughts are:
 
You may use the free Voxengo MSED plugin from http://www.voxengo.com/product/msed, set mode to INLINE and simply bring down the Mid Gain knob to widen the image.
 
Would love to hear your thoughts.  I find that it works incredibly well with binaural recordings too.
 
Cheers

 

[Speedskater]

It's something that could always be done in analog circuits.  It's called a "Mid Side Matrix". You can adjust how much stereo or mono to taste.

 

[castleofargh]

or as an EQ setting for even more fun.