Page 1
QFW10D4 • QFW12D4 USER MANUAL Installation Instructions | Owners Manual Due to continuous improvement of the product, specifications are subject to change without notice.
Page 2
Introduction Congratulations on your purchase of a DB Drive state-of-the-art subwoofer. Your selection of a DB Drive car audio product indicates a true appreciation of fine musical reproduction. Whether adding to an existing system or including your DB Drive subwoofer in a new system, you are certain to notice immediate performance benefits.