User manual ALPINE PMX-F640

[. . . ] Always stop the vehicle in a safe location before performing these functions. Excessive volume levels that obscure sounds such as emergency vehicle sirens or road warning signals (train crossings, etc. ) can be dangerous and may result in an accident. Doing so may result in an accident, fire or electric shock. [. . . ] 1 Right terminal cover 2 Left terminal cover 3 Screw (M3 x 12) NOTE: Do not lift or carry the unit by the attached terminal covers. Before making connections, be sure to turn the power off to all audio components. Connect the yellow battery lead from the amp directly to the positive (+) terminal of the vehicle's battery. Do not connect this lead to the fuse block. Locate the unit and route the leads at least 10cm (3-15/16") away from the car harness. ⷠKeep the battery power leads as far away from other leads as possible. ⷠConnect the ground lead securely to a bare metal spot (remove any paint or grease if necessary) of the car chassis. ⷠIf you add an optional noise suppressor, connect it as far away from the unit as possible. Your Alpine dealer carries various noise suppressors, contact them for further information. ⷠYour Alpine dealer knows best about noise prevention measures so consult your dealer for further information. Be sure to observe correct speaker output connections and phasing in relation to the other speakers in the system. Do not use the speaker (­) terminals as a common lead between the left and right channels. Do not connect this lead to the vehicle's chassis. Do not connect speaker leads together or to chassis ground. Use a Y-adaptor (sold separately) for the input when bridging the outputs. 2 Power Supply Terminal 3 Ground Lead (Sold Separately) Connect this lead securely to a clean, bare metal spot on the vehicle's chassis. Verify this point to be a true ground by checking for continuity between that point and the negative (­) terminal of the vehicle's battery. Ground all your audio components to the same point on the chassis to prevent ground loops. Only use 8mm2 (the wire gauge) for this connection. 4 Remote Turn-On Lead (Sold Separately) Connect this lead to the remote turn-on or power antenna (positive trigger, (+) 12V only) lead of your head unit. 5 Battery Lead (Sold Separately) Be sure to add a 50 amp fuse as close as possible to the battery's positive (+) terminal. This fuse will protect your vehicle's electrical system in case of a short circuit. [. . . ] , Bass EQ Selector Switch (3/4 ch) Boost the low frequency output of the amplifier from 0dB (flat) to +12dB. Important Tips on Bridging an Amplifier NOTE: The following problems may occur if the amp is not properly connected. 1) Low output when only one input is used. 2) Premature overheating, resulting in the early operation of the protection circuit, when only one input is used. [. . . ]