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warranty. Mounting your amplifier inside an enclosure is not a good idea unless
the enclosure is equipped with ventilation fans to circulate fresh air through the
enclosure.

Your new D7 amplifier features adjustable mounting flanges. Should they need
to be moved to a different location, remove the self-tapping screws on the
bottom of each mounting flange. Move the flange to the desired location.
Carefully tighten the self-tapping bottom screws. Be careful not to overtighten
these screws or damage to the head of the screws or stripping of the threads
will result.

POWER/GROUND

D7 amplifiers need proper power and ground connections to deliver maximum
performance and efficiency. This is typically the least understood part of the
installation process. Voltage drops due to poor quality connections and/or poor
grounding practices will rob your audio system of power that could be used for
listening to music. These voltage drops will create increased current draw and
will make it easier for noise to enter your system.

Your new amplifier has a fully regulated power supply. It is designed to make
full power even if the voltage changes. It will draw more current at 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 for best performance.

POWER (+12V)

Strip approximately 1/2 inch of insulation from the end of the power cable
going to the amplifier. Insert the stripped cable into the power block on the
end of the amplifier and tighten the Allen screw. A ring terminal may also be
used directly at the power block. Repeat for each amplifier installed.

GROUND

For low power systems, locate a fairly thick metal area near the amplifier(s).
Inspect around and under the chosen area to make sure you won’t drill into
wires, brake or fuel lines, computers, etc. Remove any paint and carpet glue to
a spot approximately 1 inch in diameter. Drill a hole into the middle of this
area. Cut a length of ground cable long enough to go from the ground point to
the amplifier. Terminate the ground cable with a ring connector and attach it

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SYSTEM DIAGRAM 1

Basic Triamp System:

2 Channel Three-Way

D7 six channel amplifier

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Channels 1/2 Highpass to a pair of tweeters

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Channels 3/4 Bandpass to a pair of midrange drivers

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Channels 5/6 Lowpass  to a pair of midbass drivers

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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