cheers for the decent replies! was looking at this Amazon.com: Pioneer TS-SW2501S2 10-Inch Shallow Subwoofer with 1200 Watts Max Power: Car Electronics with Amazon.com: PIONEER UD-SW100T SHALLOW SERIES SUBWOOFER ENCLOSURE (10"; BEHIND THE SEAT) (UD-SW100T) -: Car Electronics appreciate all thoughts and advise