How loud is 2 - 300 watts subs & 800 watts amp? ?

I have a VW Golf and want to put these on my friend sent me this info about them.

"Hahah its 2 twelve inch pg octane subs that are 300 watts each and a 800 watt alpine amp"

IS THIS LOUD? How loud? Kinda loud.. Loud .. Or very loud!! Pick one. Thanks I know nothing about watts
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