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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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.
Hi there, I recently purchased this item, to try it as a replacement for my WLM EQ (between music server and integrated tube amp). It does everything as advertised and mentioned in this thread. I struggle with one drawback, however, and that is slightly more  emphasis on sibilance (I can't stand that). There is no change in the high quality interconnects and power cable connected to the unit (same as to WLM) so the problem is in the new unit. I am trying tube rolling without major improvement. Any advice?