I receive the Stax SR 009 and listen it for 2 hours so it is my first impression about it.
Firstly I use it with the WEE and the system on my signature.
The imaging is more extended than I thought so it's a very positive point. But I think than my system it's not optimal on the soundstage, I will try soon a more conventionnal rig.
It has better details retrieval and nuance than HD800 and Abyss.
I find it brighter and drier than the HD800 and Abyss. It has slam than others.
I don't find it more effortless or liquid.
There is my first impressions and need to confirm with fast swap between them.
My WEE is drier and brighter sounding than a Stax transformer, with better detail but more forward soundstage, and it pairs better with the 007 Mk1. I don't like it nearly as much with my 009, regardless of amp. With 007 and a 40-watt Marantz receiver you'll be much happier with the WEE.