Use for Old Creek Pre-Amp & Amp

I was “gifted” an old Creek pre-amp and amp by a friend whose partner had passed away and who had long since switched to a home theater set-up. The pre-amp is a Creek Special Edition OBH-8SE MM Phono Pre-amp, and the other is a Creek OBH-2 “Regulated Power Supply” unit (it says an output of 24V, 500mA max). Since I have never used such components, and they were issued in the late 1990s, I was wondering whether it was possible to power a couple of modern bookshelf loudspeakers, or stand-alone monitors, with them? For example, would one be able to power a couple of Polk or other bookshelf speakers with them, or perhaps even a Polk TSi200 bookshelf or Polk TSi400 Tower?
I know this is an amateur question, but I'm new to these component systems.