[. . . ] Optimum performance is obtained when the unit is installed at an angle of less than 60°. When reattaching the trim ring, push the trim ring onto the unit until it clicks. (If the trim ring is attached upside down, the trim ring will not fit properly. [. . . ] (If the trim ring is attached upside down, the trim ring will not fit properly. It becomes easy to remove the trim ring if the front panel is released. If you do not plan to detach the front panel, the front panel can be fastened with supplied screw. When reattaching the trim ring, push the trim ring onto the unit until it clicks. (If the trim ring is attached upside down, the trim ring will not fit properly. It becomes easy to remove the trim ring if the front panel is released. Determine the appropriate position where the holes on the bracket and the side of the unit match. This unit can be properly installed either from "Front" (conventional DIN Front-mount) or "Rear" (DIN Rear-mount installation, utilizing threaded screw holes at the sides of unit chassis). Speaker leads White: Front left White/black: Front left Gray: Front right Gray/black: Front right Green: Rear left or subwoofer Green/black: Rear left or subwoofer Violet: Rear right or subwoofer Violet/black: Rear right or subwoofer Perform these connections when using the optional amplifier. ISO connector Note In some vehicles, the ISO connector may be divided into two. Yellow/black If you use an equipment with Mute function, wire this lead to the Audio Mute lead on that equipment. When using a subwoofer of 70 W (2 ), be sure to connect with Violet and Violet/black leads of this unit. Use this unit in other than the following conditions could result in fire or malfunction. To prevent short-circuit, overheating or malfunction, be sure to follow the directions below. To protect the wiring, wrap adhesive tape around them where they lie against metal parts. -- Place all cables away from moving parts, such as gear shift and seat rails. [. . . ] To prevent short-circuit, overheating or malfunction, be sure to follow the directions below. To protect the wiring, wrap adhesive tape around them where they lie against metal parts. -- Place all cables away from moving parts, such as gear shift and seat rails. [. . . ]