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7

POWER CABLE GAUGE CHART

14

An additional temperature monitoring circuit protects the D7 amplifier
under extreme high power or extreme high-ambient temperature conditions.
As the heat sink temperature reaches 185 degrees Fahrenheit, this circuit will
shut down the high-current rail voltages, tuning the amplifier off while it cools
down. The fan will remain on to ensure proper cooling of the amplifier.  When
the amplifier cools down to a safe operating temperature, the amplifier will turn
itself back on and play normally.

If a problem arises, refer to the troubleshooting section (page 15) or call the
Diamond Audio Technical Department at (480) 813-6205 for assistance.

 WORD ABOUT BATTERIES

AND HIGH OUTPUT ALTERNATORS…

The battery in your car is a chemical storage device for electrical energy
generated by the alternator. It is capable of briefly supplying high currents for
cold starting the vehicle as well as powering other important electrical loads
either partially or entirely for a limited period when the engine is off.

In order to supply the power required for ignition, lighting, large audio
systems etc. a car needs its own efficient, reliable, and constantly available
source of energy. When the engine is stopped, the battery is the vehicle’s
energy source. 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.

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 stereo) =

33 amps

Amplifier 2: D7401 (driven at 2 ohms mono) = 132 amps

Grand Total = 165 amps

Summary of Contents for D7401

Page 1: ...EQUENCIES Diamond Audio D7401 features fully variable crossovers The frequency control knobs located in the tray on the top of the amplifier when rotated all the way to the left are labeled 50Hz Lowpass and 15Hz Highpass When rotated all the way to the right are labeled 5kHz Lowpass and 1 5kHz Highpass To make basic setting of the crossover frequencies a little easier we ve come up with the follow...

Page 2: ...dure Note To set crossovers first remove the two 1 16 Allen screws holding down the security cover using the Allen key provided When reinstalling the cover be careful not to overtighten the screws Damage to the cover may result 12 RCA INPUTS AND OUTPUTS As seen in the above drawing the function of the RCA inputs outputs and feature buttons are as follows INPUT The RCA cables from your source unit ...

Page 3: ...te fully independent crossover for the output RCA jacks providing filter control of any other amplifier It is continuously variable from 50Hz to 5kHz High Low Bandpass or Full Range When switched off they are completely out of the signal path 13 THERMAL MANAGEMENT SYSTEM All D7 Professional Reference Series Amplifiers feature our Intelligent Thermal Management System All amplifiers feature one or ...

Page 4: ...ilable source of energy When the engine is stopped the battery is the vehicle s energy source 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 ideall...

Page 5: ...Ohm mono load double the total wattage number D7401 800W 2 Ohms Mono x 2 1600W 1600W 132 Amps Total Current Draw 12V 15 If you are considering a high output alternator or if you are not sure if your vehicle s charging system needs to be upgraded consult your Authorized Diamond Audio Dealer They will be happy to set you up with everything necessary for you to enjoy a listening experience in your ve...

Page 6: ...ne end into the ground distribution block and tighten the Allen screw Insert the other end of the cable into the ground block on the amplifier and tighten the screw A ring terminal may be used here Repeat for each amplifier installed Run a cable the same gauge as the main power cable from the ground distribution block to the negative terminal of the system battery Your D7 Professional Reference Se...

Page 7: ... lower voltages to make that power Try to ground your system to a single point in the vehicle The gauge of the power and ground cables must be capable of handling the current needed by the entire system Power and ground cables must be of the same gauge If the alternator is not capable of supplying enough power for both the vehicle AND the audio system a high output alternator should be installed f...

Page 8: ... any nearby flammable object wire loom etc causing a fire or other damage Reconnect the negative terminal after all connections have been made MOUNTING YOUR AMPLIFIER WARNING AMPLIFIERS GENERATE HEAT You can mount your amplifier in any position even upside down However airflow must be maintained Do not install your amplifier under carpets or behind airtight panels Let the amplifier breathe Without...

Page 9: ...pply resulting in increased current draw We recommend that you install the correct size fuse holder combination to the main power cable within 18 inches of the battery This will protect your vehicle from fire damage due to a short circuit to the chassis or vehicle body If a single amplifier is installed follow the fuse recommendation below If installing multiple amplifiers add up the total fuse ra...

Page 10: ...ration with Supplied Plexiglas Security Cover Separate Independent Crossover for RCA Outputs 24 Karat Gold Plated Solid Brass Circuit Board Mounted 4 Gauge Direct or Ring Terminal Power Ground Connector Blocks 24 Karat Gold Plated Solid Brass Circuit Board Mounted 10 Gauge Direct or Banana Plug Direct Speaker Connectors Tinted Plexiglas Circuit Board Viewing Panel Solid Billet CNC Machined End Pan...

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