I'm very happy with my toyota auris hybrid 2014/15. I'm looking to install subwoofer.I have recently bought Edge sub 12" 750w Web built in amp but due to its size, I'm thinking to get underseat subwoofer instead. Is there anyone who have had experience of both subs? Is there anyone who can guide / suggest something to help me get this sub installed please? It will not avoid my car's warranty, am I right? Posted via the PriusChat mobile app.