How do I choose speakers for an amplifier?

Actually, they were rated differently. I did the math to come up with an approxamate wattage. They were slow blow they had a little coil instead of the usual straight wire. They came with the speakers. Who knows they maybe the were also used to fuse lightning rods! I eventually had to go to something else more industrail because of cost. That may have cost me those spaekers later on. They were not for decoration. I did blow the fuses after I upgraded my amp to power amp & pre amp. Actually I blew them a few times. The speakers were 4 ohm and needed massive amounts of power. My 200 watt RMS amp was a light weight and was always clipping. It could clip with the volume at 1/4 if the music had really low notes. When I got the right amp it could potentually blow the speakers. However, I had enough sound for me. At that time I had a descent job and was living with my parents. I could piss away crazy money on a hifi.