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9

CROSSOVER CONTROLS: CH 1/2, CH 3/4, X-OVER OUT

As seen in the above drawing, the function of the crossover controls (from
left to right) are as follows:

GAIN

This control matches the output voltage of the source unit or processor to the
amplifier inputs. Rotating this control to the “MIN” mark (counterclockwise)
configures your D7 amplifier to accept input voltages as high as 12V RMS with
the -12dB button pushed “IN” (see “RCA INPUT” drawing on page 12). This
control should be set as low as possible. The basic procedure for setting
input gains is as follows:

1.

Adjust all amplifier gain controls to just above the minimum setting
(fully counterclockwise). If your source unit output voltage is 

less 

than

6 Volts RMS, push the –12dB button for the selected channel pair to
the “OUT” position. If the available signal voltage is 

more 

than 6 Volts

RMS, push the -12dB button to the “IN” position.

2.

Using the highest quality source (usually CD) play some music and
slowly turn up the source unit until you can hear distortion. Now turn
down the volume until the distortion stops. This is your maximum
source unit level.

3.

Turn up the amplifier gain until audible distortion starts. Turn down
the gain to the point JUST BELOW the start of the distortion.

4.

Repeat step 3 for all amplifiers in your system.

Please refer to the Diamond Audio Level Setting Technical Brief available from
the Tech Department for a comprehensive level setting procedure.

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:

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 signal voltages as
high as 12VRMS. Pushing this button “OUT” configures the amplifier to
accept signal voltages up to 6VRMS.

-12dB BUTTON: CH 3/4

Works the same as above, but for the CH 3/4 INPUT RCAs.

CH 3/4 INPUT

Additional RCA cables from your source unit should be inserted here.

CH 3/4 INPUT SELECT

Pushing this button “IN” allows signals from CH 1/2 to be sent to both
CH 1/2 and CH 3/4 INPUTS allowing use of a single pair of RCA cables for
all inputs (see block diagram page 16).

X-OVER INPUT SELECT

Pushing this button “IN” routes signals from the CH 1/2 INPUTS to the inputs
of the AUXILIARY X-OVER. Pushing this button “OUT” combines the signals
from CH 1/2 and CH 3/4 (useful for systems requiring non-fading bass).

X-OVER OUT

These RCA outputs are used to provide filtered or unfiltered signals to an
outboard processor or amplifier.

By pushing the X-OVER INPUT SELECT button to the “IN” position,
and pushing the LOWPASS ON/OFF and HIGHPASS ON/OFF crossover
buttons to the “OUT” position, signals available at the CH 1/2 INPUTS will
bypass the crossover and be made available at the X-OVER OUTPUT RCAs
allowing you to “daisy-chain” multiple D7 amplifiers for the ultimate in
system design flexibility.

Summary of Contents for D7054

Page 1: ...ility D7 CROSSOVER FREQUENCIES Diamond Audio D7 Professional Reference Series Amplifiers feature fully variable crossovers The frequency control knobs located in the tray on the top of the amplifier are labeled 50Hz when the knob is rotated fully counter clockwise left and 5kHz when rotated fully clockwise right To make basic setting of the crossover frequencies a little easier we ve come up with ...

Page 2: ...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 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 ...

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: ... 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 l...

Page 5: ... 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 If ...

Page 6: ...d 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 Series ...

Page 7: ...ower 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...

Page 8: ... 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 Let the amplifier breathe Without air circulation your amplifier will redu...

Page 9: ...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 ratings...

Page 10: ...signable Crossover Output RCA Jacks 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 Panels with Adjustable Mounting Flanges SPECIFICATIONS DIMEN...

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