Sonido measurements…

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Field coil driver power supply…

Ok after a month of listening I have to say these speaker drivers and these boxes have exceeded my expectations.  Just gobsmacked at the detail, soundstage, clarity with instrument separation, deep clean bass, and the most holographic that I have heard in my system.  It did take 60-80 break-in hours and some tweaking to reduce the mid-hi and hi fatigue.  I was getting some uncomfortable resonance? on Sax, female vocals, piano, harmonica.  Tried changing speaker position, tubes and then speaker cables solved the issue.  Amazing how synergy is so important.  My Goertz mi-3 cables that were the problem just weren’t a good match for these field coil magnet drivers but sounded “by far“ best in my Ohm Walsh 2000’s. Switched to Kimber Kable 12TC and what an improvement.  Just softened it a bit to remove the fatigue.  I am going to build some 10ga Duelund/Coherent tinned copper cables for fun to see how they match.  A lot of good feedback on just how “Real” sounding these cables sound.  We shall see!