Honestly I don't remember exactly but I believe they were Ayre MXR Twenty monos.
John could tell you.
He was also using another jawdropping piece of equipment the Ayre pre KRX Twenty. Which is what he was demonstrating for me even though he knew I couldn't afford it. It was just some time spent listening to music and demonstrating the quality of Ayre products. I remember that because of its astonishing sound and the, ahem, interesting price.