Help Identifying Polk Audio Monitor Speakers??

Hello,

I have Polk Audio Monitor's but they are not labeled 2, 4, 5, etc. From doing research online, I think they are some variation of the Monitor Series 4, but I am not sure. The back of my monitor's read "Polk Audio Monitor Series 82074". Both the case and cover are black. Can someone give me more information on these speakers and let me know what crossover schematic I should refer to? I currently have them hooked up to a Pioneer SX-737 and they have a very nice detailed sound with not much on the low end, but that is fine for my bedroom setup. Any help would be greatly appreciated.

Thanks

Answers