Further Information
Fabulous 6SN7 pre-amp and separate power supply. You can read more about it here: https://retro-thermionic.blogspot.com/2019/03/icon-cv-181-z-preamp.html
I bought this from here a few months ago but have not got chance to use it. Below are the description provided by the previous owner.
I paid $1070 for this without tubes. Since owning it I returned it to Mark who upgraded it with Mundrof Silver Oil Capacitors that I supplied (RRP $180) - which took the sound quality up another level again.
I have been using this with a pair of Shugang CV-181Z and it punches WAY above its price point. Compared to my Manley 300B pre-amp (around $12,000 RRP last time i checked) the icon holds up very well - the Manley has a slightly larger soundstage and slightly better separation but considering the size, cost and number of tubes Mark's work speaks for itself.
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