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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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Third-Order 18dB/Octave Butterworth Crossover Topology

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Wide Bandwidth/Low Distortion Symmetrical Gain Output Stage

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3 oz. Gold Plated Copper Circuit Board

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High Efficiency 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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Three 3-Way Fully Variable And Independent Electronic Crossovers
in Top-Mount Configuration With Supplied Plexiglass Security Cover

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Assignable Crossover Inputs

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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

Frequency Response:

3 – 50,000 Hz

Signal-to-Noise Ratio:

102dB

THD:

0.02%

Channel Separation:

80dB

Input Sensitivity:

.5 to 12VRMS

Input Impedance:

>40kOhms

Power Supply Operating Range:

10 to 16VDC

DIMENSIONS

D7056 Dimensions

Length:

22 3/4"

Width:

10 5/8"

Height:

3"

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SYSTEM DIAGRAM 4

Four Channel Fully Active

System with Subwoofers

D7 six channel amplifier

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Front RCA outputs of source to
channels 1/2 Highpass to tweeters

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Channel 3/4 INPUT SELECT button “IN”

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Channels 3/4 Bandpass to midrange drivers

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Rear RCA outputs of source to channels 5/6
Highpass to rear fill coaxial components

D7 2 channel amplifier

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Subwoofer RCA outputs of source
to channels 1/2 Lowpass to a pair of
bridged 8 Ohm subwoofers

Summary of Contents for D7056

Page 1: ... up with the following rotational diagram HIGHPASS LOWPASS FREQUENCY 11 Notice that the outer most circle of numbers 1 00 2 00 etc represent numbers as they appear on the face of a clock The number underneath each hour designation on the simulated clock face is the approximate crossover frequency at that position BRIDGING All pairs of Diamond Audio D7 amplifier channels are capable of being bridge...

Page 2: ... be careful not to overtighten the screws Damage to the cover may result 12 As seen in the above drawing the function of the RCA inputs outputs and feature buttons are as follows CH 1 2 INPUT The RCA cables from your source unit should be inserted here 12dB BUTTON CH 1 2 To the right of the CH 1 2 INPUT RCAs you will find the 12dB button Pushing this button IN allows your amplifier to accept signa...

Page 3: ...nel D7 amplifiers also provide a separate fully independent crossover for the output RCA jacks providing filter control of any other amplifier 13 THERMAL MANAGEMENT SYSTEM All D7 Professional Reference Series Amplifiers feature our Intelligent Thermal Management System All amplifiers feature one or two depending on model internally mounted temperature controlled cooling fans Care should be taken t...

Page 4: ...he 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 ...

Page 5: ...or 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 vehicle without equal BASIC TROUBLESHOOTING 1 Amplifier has no output Is LED located on power ground endpanel lit Yes Make sure audio signal is present at RCA inputs I...

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: ...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 for best performance...

Page 8: ...by flammable object wire loom etc causing a fire or possibly even a tear in the fabric of time and space 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 Le...

Page 9: ...e 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 ratings of all installed amplifiers This sho...

Page 10: ...ard 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 Panels with Adjustable Mounting Flanges SPECIFICATIONS Frequency Response 3 50 000 Hz Signal to Noise Ratio 102dB THD 0 02 Channel Separati...

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