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If you have any questions or need added help with your new D3 Amplifier, please feel free
to call Diamond Technical Support at 1-866-328-2834.
SYSTEM DIAGRAMS
Low
HIGH
FULL
Fig.5 In this application the amplifier is bridged for mono operation to drive a subwoofer
The Diamond Audio D3 400.2(Fig.5 to 7)and D3 400.4(fig.8 to 13)2 and 4-channel car audio
amplifiers can be used in a variety of system applications.Here are some examples to plan
your own installation
Problem
Amplifier fuse keeps blowing.
Solution:
Check all power and signal wires for a short. Make sure power and ground wires are
correctly connected to the amp.
Problem
Whining, ticking, or any other unwanted noise present in system when engine is
running.
Solution
Amplifier may be picking up alternator or radiated noise. Make sure all signal wires
are separated from power wires. Check all signal and power wires for a sold
connection. Check all ground wires to make sure they have a solid ground.
Check alternator and/or voltage regulator for solid connections. Check battery for
adequate voltage and connection.
Problem
Distorted audio.
Solution
Check that gains are set correctly. Inspect speakers for damaged cones or bad
voice coils.
Bridged-Mono Subwoofer System
2-Channel Full-Range, Satellite, of Subwoofer Stereo System
Set X-Over Mode to FULL
Low
HIGH
FULL
Low
HIGH
FULL
Low
HIGH
FULL
Set X-Over Mode to FULL
ADJUST FREQ to speaker
Specifications
Set X-Over Mode to LOW
ADJUST FREQ to speaker
Specifications
Fig.6 In this application, the amplifier is used in stereo and drives two full-range (or satellite or
subwoofer) speakers. NOTE A passive crossover must be used with satellite speakers.
D3 400.2
D3 400.2
5 6