Make and model of speakers?
Receivers top out at about 100-150 watts per channel. Integrated amps (amp and preamp in one) maybe top out at 300 watts per channel.
Junk amps are not rated according to FTC standards so it's really common for a 50 watt per channel amp to end up 500 watts by the magic of advertising. That same MAY be true of your speakers.
If you actually have speakers that will handle that much power
http/www.crownaudio.com/en-US/products/i-tech-5000hd
You would also need a preamp.
Some receivers do have preamp outputs so you can connect any amp you want. That might work for you too.