LikelyLagging

Stumbled across a good Facebook deal yesterday, didn’t realize how good until I got home and looked up the model numbers. 4 aw-650’s for 70$ all in working and great condition. Only think is I kind of gotten ahead of myself and have no source/power for them.. I was hoping to wire in parallel but the manual says that’s a no go. So what amp/receiver do I need to power them? Budget friendly options are really all I’m able to afford at the moment. It’s for the backyard so I’m not too worried about fidelity, just want to have loud music when required. I’m not a complete audio amateur but wattage/ohms/all that shit still breaks my brain sometimes lol any and all advice would be infinitely appreciated. And my apologies if i don’t reply frequently as I am a paramedic and my schedule is chaotic to say the least. Thanks!