Hi guys i dont know too much about speakers, amps, etc. Just the basic knowledge.
Got these speakers for free, are perfect working, and pretty much never used.
I would like to simply hook up my laptop and play these for paries etc. No real need for Mixers, DJ equipment etc, but whatever.
That is the max rating, not minimum. But you can certainly go above 300wpc amp, just don't run at max volume. Might recommend a nice Crown digital amp for what you intend. Can be very powerful yet light for transport.
A preamp is to give you multiple sources and a volume control. With your intent, you shouldn't need one. Might want one for a better volume control, or maybe a DAC instead.