Hi Rod,
These speakers were built to customer order by Lewis Muratori, a superb speaker designer and builder. He works as a psychiatric nurse; his attention to detail and musical ear is legendary. I think he charged somewhere around $US3300 for these speakers; they are huge, but easily fill a hall with 100 people present on only 28W (my Glass Harmony, some years back in fact). I will never forget Resphigi's Appian Way played on these speakers; the Centurion March into Rome was palpable. Efficiency is 94dB/meter/watt.
Lewis has two reference amplifiers. The first is a custom 35W 845 PP amp built by Lucas Cant of Black Art Audio, with B+ of 1200V. This amp is monobloc and heavy (and expensive) beyond comprehension. The other amp is a 55W AKSA Nirvana. The AKSA is very, very good, with huge slam and impact and marvellous, black silence between notes, but the PP 845 just pips it at the post. The grandeur of the tube presentation, the warmth, and even the dynamics, are incredible. But the imaging, although very realistic, is not sharp.
Cheers,
Hugh