Our customer brought us their 2007 Chevy Impala inquiring about adding Alpine subs and possibly a deck. Once they saw how low our pricing and labor is, they decided to do it right. We added the bass package consisting of 2 Alpine 12 inch SWA-12S4 subs in a ported Atrend box E12DV. We powered these woofers with an Alpine MRV-M500 500 watt RMS digital amp. To ensure quality sound we swapped out the factory speakers for JVC CS-V6948 6×9’s in the back and JVC component mid/tweet combo’s CS-V608 up front. They customer fell in love with the 2015 Pioneer AVH-X2700BS6.1 inch touchscreen with USB and Bluetooth. The highs were bright and accurate and the bass was deep and clean. Professional installation of these Alpine subwoofers and more done by the tech crew at Audio Express 4501 E. Broadway, Tucson, AZ 85711 (520) 327-6349 your car audio custom installation experts. We can recommend and install a sub system to fit your car and budget.