Naturally you'd want the matching X-50 mono amplifiers! They deliver 50 watts and Vintage Chief.com has them.
We appreciate this Harman Kardon 330B receiver's still-modern-looking take on receiver design. It retailed for $199 in the 1970s and offered 18 watts per channel. Your editor owned one and liked the sound, and foolishly got rid of it in the days before vintage receivers became a thing. All images courtesy of Vintage Chief.com.
We'd stay in that chair also if we had these probably-circa-1970s Dual components!
What in the Bizarro World is this guy doing? Not audio-related but this was too crazy not to include. What could possibly go wrong? From The Experimenter, March 1925. Courtesy of Wikimedia Commons/public domain.