Metra Electronics - 99-9107B - Audi A4/RS4/S4 2002-2008 (with Symphony or NAV radio) subwoofer Mount it securely so it

Mount it securely so it cannot shift

Variable 12dB crossovers provides control to dial in perfect sound

the low end should feel effortless rather than strained

This 8-inch loudspeaker comes in 4-ohm and 8-ohm impedance ensuring compatibility with a wide range of audio systems

Metra Electronics - 99-9107B - Audi A4/RS4/S4 2002-2008 (with Symphony or NAV radio) subwoofer Mount it securely so itThis stereo installation kit has been engineered to help you install either a 2 tall (Single DIN) or a 4 tall (Double DIN) aftermarket radio into the original vehicle dashboard. This dash kit makes radio replacement simple and comes with a pocket that is installed below the 2 radio to fill the extra space in the radio opening, which can be used for storage. The pocket is not needed when installing a 4 tall radio. The dash kit is painted scratch