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FEATURES

TECHNICAL

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Symmetrical Topology, Fully Regulated, Triple-Split-Rail Power Supply

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Isolated Input Section Utilizing “Quasi-Differential” Instrumentation
Amplifier Technology

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Up to 12VRMS Input Signal Voltage Capability (With -12dB Attenuator)

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Single Band Bass Optimized Parametric EQ

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Third-Order 18dB/Octave Butterworth Lowpass and Subsonic Crossover
Topology with Auxilliary Crossover Topology

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Wide Bandwidth/Low Distortion Symmetrical Gain Output Stage

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3 oz. Gold Plated Copper, Double Sided Glass-Epoxy Circuit Board

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High Efficiency Intelligent Forced-Air Cooling System

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Massive 3-Piece Proprietary Heatsink

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Solid Copper High-Current Power Distribution Busbars

CONVENIENCE / APPEARANCE

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Two 3-Way Fully Variable and Independent Electronic Crossovers
in Top-Mount Configuration with Supplied Plexiglas Security Cover
(Separate Independent Crossover for RCA Outputs)

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24-Karat Gold Plated Solid Brass, Circuit Board Mounted, 4 Gauge Direct
or Ring Terminal Power/Ground Connector Blocks

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24-Karat Gold Plated Solid Brass, Circuit Board Mounted, 10 Gauge
Direct or Banana Plug Direct Speaker Connectors

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Tinted Plexiglas Circuit Board Viewing Panel

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Solid Billet CNC Machined End Panels with Adjustable
Mounting Flanges

SPECIFICATIONS & DIMENSIONS

Frequency Response:

3 – 50,000 Hz

Signal-to-Noise Ratio:

96dB

THD:

0.02%

Channel Separation:

80dB

Input Sensitivity:

.5 to 12VRMS

Input Impedance:

>40kOhms

Power Supply Operating Range:

10.5 to 16VDC

                                                    Dimensions
                                                 Length:    19 1/2"
                                                  Width:    10 5/8"
                                                 Height:    3"

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SYSTEM DIAGRAM 4

Five way System with Dual 4 Channel amps

and Dual D7401’s

D7 four channel amplifiers

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Channels 1/2 Highpass to a component set

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Channels 3/4 Highpass to rear fill coaxial speakers

D7401’s

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Lowpass to a pair of 4 Ohm woofers

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Daisy chained together using AUX Output on one amp

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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