Diamond Audio Technology D7056 Manuel d'installation - Page 2

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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

(see block diagram page 16) for channels 1 thru 4.

-12dB BUTTON: CH5/6

Works the same as above but for the CH 5/6 INPUT RCAs.

CH 5/6 INPUT

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

CH 5/6 INPUT SELECT

Pushing this button "IN" sums the signals from CH 1/2 and CH 3/4 to the

CH 5/6 INPUTS (all inputs are in parallel). All six channels will receive

signal from a single left/right RCA pair. Example: When using an D7056

amplifier for separate tweeters, midrange, and midbass drivers on the front

RCA outputs of a source unit, this button sums the signals from CH 1/2 and

CH 3/4. Pushing this button "IN" will provide "non-fading" bass if CH 5/6

are used Lowpass for subwoofers.

Pushing this button to the "OUT" position allows an additional pair of RCA

signal cables to drive channels 5 and 6 directly. Example: If your source unit

has subwoofer RCA outputs, they can go here to allow your source unit to

control the subwoofer level.

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.

CROSSOVER CONTROLS: CH 1/2, CH 3/4, CH 5/6

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:

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.

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.

Turn up the amplifier gain until audible distortion starts. Turn down

the gain to the point JUST BELOW the start of the distortion.

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.