FWIW, I used the L1 with both the G70 and the PA800, and the only thing I noticed was a muffling of the main Piano sound on the G70, but ONLY when it was being played solo.

In amongst styles it wasn't as noticeable, and I found I could brighten it up some with the EQ.
And in any case the G70 had other pianos that sounded good without "tweaking".

No issues at all with the PA800, and it (the L1) sounds exceptional with the TC Helicon Harmony M.

Dennis

PS: Not disputing anything anyone has said, just posting my experience with the L1.