The very first Nu-Vista product was a preamplifier dubbed the Nu-Vista PRE. Launched in 1997, it was the second audio product to utilize nuvistors, small, metal-clad vacuum tubes introduced in 1959 to compete with bipolar-junction transistors. The first power amplifier to utilize nuvistors was the ovoid Nu-Vista 300.
Geez, they're big! The Arendal 1528 Tower 8, the premier model in Arendal's new 1528 loudspeaker line, reached higher than my chin and weighed roughly 200lb unpacked; you can add another 100lb or so for the shipping boxes and pallets.