Kicker is a much better quality subwoofer than Pyle, and it will have much better bass as well.
Pyle is a brand of subwoofer that has fancy ones.
You can get an 18" Pyle subwoofer but you will also need a large amp for it.
kicker
The Kicker CVR subwoofer comes in sizes such as 10", 12" and 15". You can purchase these subwoofers online from the official Kicker website online store.
PYLE is not one of the best brands of amps, amps made by kicker, infinity, JVC and other top quality companies provide better quality.
kicker L7 or fosgate t1
The Kicker 1500 Watt subwoofer is very, loud, but doesn't have the best clarity and can get muddy. Consider Pioneer subs.
One can purchase a Kicker subwoofer at many electronics retail stores such as Best Buy, Future Shop and Visions Electronic. One can also buy them at online shopping sites.
http://www.kicker.com/content/Contact_US
The Kicker enclosed 12 in. subwoofer can always be connected to your factory radio, and it should be very easy to do.
It's a dead subwoofer.
Kicker solo is a great all around subwoofer for the price. Good deep bass low price who could beat that?