This audio lover brought us his 2006 Cadillac CTS wanting a slamming system. He was already familiar with the famous L7 Solobaric subwoofer. We went ahead and presented him with the L7 IQ and he knew he found what he was looking for. Our experts installed the Kicker 41DL7122. This is a loaded subwoofer enclosure housing two 12 inch L7 subwoofers. This fit like a glove in his Caddy. We then installed the Kicker IQ1000.1 mono amplifier to power these beast subs. To also help the power flow stay smooth, we install a SK-BT60 Shuruken power cell next to the amp. Since this system had so much sound, we removed the factory 10 inch sub from the rear deck to keep it clean. This Cadillac CTS subwoofer was professionally installed by the tech crew at Audio Express 7685 S. Virginia Street, Reno , NV 89511 (775) 853-1717 your car audio installation experts.