Today I got the LME49710HAX2 opamp built on an adapter. I've been listening to it for several hours and it raises the M Stage to a completely different level. The soundstage opens in width and depth and height to an almost limitless size. I have some good tube amps sitting here including the WA-2 and it cannot produce the incredible soundstage I am hearing with these opamps in the M Stage. Not only is it huge but the placement of instruments is extremely precise with incredible layering. I am listening on T1's so lesser headphones may not get all of this. Tonal quality is very realistic with the ability to see through the music. Transparency is astounding.
I have been a tube guy all my life and I have owned several solid state amps always searching for the one that would bring me the same kind of magic I get with good tube amps. The basic M Stage is very good but the WA-2 is better in almost every way. Now with the addition of these opamps the little M Stage gives the WA-2 a real battle and beats it in total soundstage presentation. I would not have thought that possible but the image through the M Stage with this opamp set is positively 3D.
Here is a link to the ones I bought:
http://www.ebay.co.uk/itm/LME49710HA-X2-Adaptor-/180872434827?
I have nothing to do with the people that are making this. I just ordered off Ebay and I wanted to share the results.