never heard them , but pyle is known for making "garbage". very low-end equipment. But my guess is it will soudn decent but won't handle very much power. you'll want to push too much power to get the volume and you'll smoke them.
I saw a guy on my bayou with a pair, never actually heard them turned on. I saw him about 5 or 6 times on the water but never heard the speakers, maybe he had a headache from them being too loud?
PYLE is defintely not high quality... but I have to add that I had 2- 18" subs in my 4dr tahoe when I was 16 and they hit sooo hard. But then again, they were 18" each.