My report on this unit so far:
1- definitely adds (as in the recent ETM review) that "dollop of bass" without screwing up the entire lower spectrum. I like a full sound and usually go close to 80% of max on my tone controls.
http://www.enjoythemusic.com/magazine/equipment/0917/Jolida_Foz_SSX_Sound_Stage_Expander_Review.htmFor demo-May I suggest the EAGLES MQA Hotel California track for an example of what I am talking about. The units bass adjustment is perfect for filling in that side of the spectrum -especially at lower listening levels. I now can dial back a little on my SS pre bass level.
2-The sound stage expander feature actually surprised me-I ended up liking it more narrow and not broad like I had assumed. I have it all the way left(narrow). This feature should help those with narrow rooms or larger areas in need of tweaking.
3-The best feature without a doubt is the tube input stage. I put this unit between my SS Parasound PHP-850 pre and A21 SS amp. It just puts meat on the music and mimics a tube like fullness to my system. No other way to say it. I just cannot imagine some of the mid fi guys adding this type of feature set to future preamps or integrateds. You get to take a nice fidelity jump for very little $$
So my call is thumbs up for the money. Just an EASY and budget minded unit for noticeable sound quality improvement for those of us usually on the outside looking in at the upper echelon of hifi toys.