Jolida Foz SS-X Tube buffer & soundstage expander?


Anyone have any hands-on experience with the Jolida Foz SS-X Tube buffer & soundstage expander?
I've read a few reviews but I want to hear from members of this website that have actually used it.
Your positive and/or negative comments would be appreciated.
https://www.audiogon.com/listings/acoustics-jolida-foz-ss-x-tube-buffer-soundstage-expander-2017-11-...
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I will be putting it thru its paces this weekend. Let me know if you see it referenced anywhere else!
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.htm

For 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.


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This component appears to use the Bass EQ  and Panorama "surround sound" circuits used in the Fosgate Signature Tube Headphone amplifier released circa 2012.  I wonder if it would be useful on the many poorly mastered CDs that seem to have a compressed soundstage.  I do not believe the tube is being used as a buffer to correct impedance mismatches. Of course my EE Minimax preamp has an enormous effect on tone and soundstage depending on the specific 12au7 signal tube or 6x4 rectifier being used in the signal path - a Mullard M8136 will kill the treble response while an RCA black plate will create excessive bass response.  The Minimax preamp does not generally make poorly recorded/mastered CDs sound better especially on hard rock music.  Fosgate's patented circuits will change the sound in ways some will like or find useful and others dislike for various reasons. Any more input from people using this component would be very helpful.