User manual DIAMOND AUDIO D7056

[. . . ] LOWPASS ON/OFF Pushing this button "IN" engages the Lowpass filter. Pushing this button "OUT" will bypass the filter. LOWPASS FREQUENCY Turning this control sets the Lowpass crossover point from 50Hz (fully counterclockwise) to 5kHz (fully clockwise). HIGHPASS FREQUENCY Turning this control sets the Highpass crossover point from 50Hz (fully counterclockwise) to 5kHz (fully clockwise). [. . . ] When the engine is running, the alternator is the on-board "electricity generating plant. " It is the job of the alternator to supply power to all current-consuming loads (including the audio system). Alternator output, battery capacity, and power demand of all electrical loads and systems must be matched as ideally as possible so the entire system is reliable and trouble-free in operation. In the most basic of terms, this means that car audio is gasoline powered. Extra batteries are primarily for the extended operation of your audio system when the engine is off or for SPL competitions where high sound pressure levels are generated for short periods of time and large battery racks are needed to provide the necessary current demanded by the many amps used. D7 Professional Reference Series Amplifiers are capable of reproducing "concert level" volumes with incredible accuracy. Care must be taken to ensure that your vehicle is capable of supplying the voltage and current required by such a system. POWER CABLE G AUGE CHART Note: If you are installing multiple amplifiers, add up the total current draw for all of them and choose the appropriate gauge based on the grand total. Example: Amplifier 1: D7054 (driven at 4 ohms) = 33 amps Amplifier 2: D7152 (driven at 4 ohms) = 50 amps Amplifier 3: D7152 (driven at 4 ohms Bridged) = 100 amps Grand Total = 183 amps 14 7 TURN-ON CONNECTION (REMOTE) Locate the terminal labeled "REMOTE" between the ground and +12V power connection points on the end of the amplifier. Your source unit should have a wire in its harness labeled "REMOTE" or "AMP TURN-ON. " Some source units come equipped with a "Power Antenna" lead only. Run this wire from your source unit to the amplifiers REMOTE connection. Strip approximately 1/2 inch of insulation from the wire. Insert the wire into the terminal, and tighten the Allen screw. Your D7 Professional Reference Series Amplifier will accept remote turn-on wire up to 10 gauge directly. A WORD ABOUT POWER AND GROUND CABLE G AUGE. . . The following basic formula can be used as a quick guide to determine the total amperage draw of a mobile audio system. This formula is based on a 50% amplifier efficiency rating. Diamond Audio D7 amplifiers are more efficient. Using cable of a larger gauge will only increase the current capability of your system. Do not use cable of a smaller gauge than suggested here. Amplifier is going into thermal protection. Make sure amplifier has room for fan(s) to breathe. Preventing air from reaching the heatsink will cause the amplifier to overheat, as will running the amplifier at too low of an impedance. 6 15 AMPLIFIER BLOCK DIAGRAM (D7056) to the bare metal using a bolt, star washer and nut. Seal the area from above and below to prevent rust. [. . . ] Without air circulation, your amplifier will reduce its power output to protect itself. D7 Professional Reference Amplifiers utilize a forced-air cooling system. Care must be taken to provide a sufficient flow of air around the amplifier for the thermal management system to operate at peak efficiency. Air is drawn into the system along the sides of the amplifier, over the circuit board, through the bottom heat sink and is exhausted through the vents on the end panels. [. . . ]