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AMPLIFIER OVERHEATING AND SHUTTING DOWN
The most common cause for this problem is when amplifiers are
overloaded with speaker impedances lower than what they are rated for.
Double-check the impedance of your speakers and their wiring. Also
check that no speaker leads are shorted to the vehicle metal chassis.
AMPLIFIER GOING INTO PROTECTION
When an amplifier goes into protection mode, we have to first establish
whether the problem lies with the amplifier, or whether it is something in
the installation. Disconnect all RCA and speaker cables, leaving the power,
ground and remote connections. Turn the system on, and if the amplifier
now powers up properly, add the RCA cables, and see if the amplifier goes
into protection. If not, proceed by reconnecting the speaker leads etc. By
following this simple process of elimination, the fault can be diagnosed
quite easily.
LACK OF BASS
The lack of bass can be attributed to various causes.
Check that the proper recommended enclosures have been used for the
woofers.
Check the phasing of multiple woofers connected to one amplifier, as well
as those connected to multiple amplifiers. If the positive and negative
terminals are reversed in a two woofer systems, you will get a cancellation
which sounds like a lack of bass. Always double check your wiring for
proper phase.
Position of woofer enclosures in the vehicle will also affect bass output.
You should experiment with different box positions, firing forward,
backward or upwards to see which way you get more bass in to the cabin.
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