Finally had to sell off my L1 classic...Just could not get used to mono (excellent as it was).
The Truepiano VST did sound okay via mono, but whenever I played it through the studio monitors in stereo, just so much better.
I haven't gone away from Bose because I think they make superb PA's, so I went over to a 502a panarray stereo system with the 502b sub.
It won't arrive until tomorrow so I will not know until then.
I still think the L1 is a great PA, I am just a stereo guy I think
