Setting The Gain - Diamond D3 Product Owners Manual

Diamond Audio recommends using speaker wire of at least 16 gauge. Lay out the wire in
the vehicle from fhe individual speaker locations to the amplifier(s). Observe safe wiring
precautions.
D3 amplifiers will accept speaker wire spade terminals up to 12 gauge. Locate the
speaker terminal block on the end of the amplifier. Sfrip approximately 1/4 inch of
insulation from the wire, crimp a 12 gauge spade terminal onto the wire, insert the
terminal into the speaker block on the end of the amplifier and tighten the screw. Repeat
for all speaker wires. Please observe recommended minimum speaker impedances to
prevent possible damage.
SETTING THE 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 the D3
amplifier to accept input voltages as high as 5V RMS. This control should be set as low
as possible. The basic procedure for setfing inpuf gains is as follows:
1. Adjust all amplifier gain controls to just above the minimum setting (fully
counterclockwise).
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 lUST BELOW the start of the distortion.
4. Repeat step 3 for all amplifiers in your system.
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