Front+Rear Speaker Replacement For 1997-2001 INFINITI Q45

This kit replaces the front and rear speakers in a 1997-2001 INFINITI Q45 with one pair of MB Quart FKB116 6.5" speakers up front and one pair of MB Quart FKB113 5.25" speakers in the rear, matching each factory cutout to the size it was built for instead of forcing one universal size into both locations. The FKB116 handles 240W peak power (120W RMS) per pair across 40 Hz to 22 kHz, and the FKB113 handles 180W peak power (90W RMS) per pair across 60 Hz to 20 kHz. Both speakers share the same construction: an aluminum dome tweeter over a thermal-formed polypropylene cone, a butyl rubber surround that holds its shape through hot summers and cold winters, and a pure copper voice coil wound on a Kapton former for fast heat dissipation. Heavy-gauge stamped steel frames keep both speakers rigid over rough roads, and spade connectors or direct soldering work on either one at install. Because front and rear come from the same speaker line, tone and output stay matched end to end on the INFINITI Q45 instead of the front stage sounding brighter or duller than the rear fill.