The WM1Z is a very good DAP in terms of the sound & battery. The K-mod with the Mr.Walkman firmware mod bumps it up a notch. I still am holding on to mine.
I've the WM1AM2 too. How do you like it after hearing Cayin N30LE? To me both can exist in my collection despite the N30LE being the superior dap.
I like it quite a bit but I’m also really only evaluating it from a synergy perspective with FW, I tend to move my sources around depending on whatever IEM I am listening to the most.
The Grand Maestro on the other hand.. the N30 was incredible for that. The AM2 doesn’t do that IEM justice unfortunately but it still “sounds good” from the Sony, but I’ve heard it sound much better as well. It starts to sound a tad compressed and closed in from weaker sources :/ I still enjoy it regardless so that’s really all I’m concerned about at this point as my ears are definitely more occupied w FW at the moment.
N30 is definitely the most complete DAP I’ve ever used, but for easy to drive IEMs I feel a lot of the value in owning such a top class device gets lost a little.