Stephen D. from Farmington, NM, added a pair of hard-hitting 12" JL Audio w3v3 subwoofers and an Alpine DVD receiver to his 2003 Jaguar X-Type sedan to get more sonic miles per gallon.

James G. from Bentonville, AR, revved up the sound on his 2012 Ford Mustang with a new Pioneer DVD receiver in the dash. A JL Audio system with two 10" subs, some Evolution speakers, and an amplifier rounded out his installation.

Daniel M. from Delmont, PA, added a new Kenwood stereo and Infinity speakers to his sleek 2002 Mercury Cougar. After he discovered his speakers were underpowered, he went whole hog and added a 4-channel Kicker amplifier, plus a pair of Rockford Fosgate subs, each with their own Kicker amp.

Brandon Z. from Maryville, TN, bumped up the audio in his 2005 Nissan Altima with a Pioneer DVD receiver, Kicker amp, and some new speakers and subs.

Tyler R. from Standish, ME, went for a big upgrade on his 2007 Subaru Impreza, adding a new Kenwood receiver, speakers, and shallow-mount subs, plus a Rockford Fosgate Prime amp and custom sub box to save space. A Garmin nuvi portable navigator helps him find his way around.

Waldo M. from Centreville, GA, wanted to outfit his 1997 BMW Z3 Roadster 2.8 with a stereo to replace his tired one. He added the JVC KD-R730BT CD receiver for Bluetooth, iPod control, and better sound.