DS18 FRX2.5K Owner's Manual - Page 3

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Before securing the amplifier, inspect the mounting location carefully to ensure

that you do not drill into or damage any electrical, hydraulic, fluid or fuel lines.

INPUT SECTION

Because of the wide range of head unit output configurations all DS18 ATOM amps

have an adjustable input sensitivity of "Gain". The gain is not a volume or a power

limiting control like a throttle. It makes the amp more sensitive to input from the

stereo; with the gain up, the amp will reach full output at a lower volume setting

on the deck. At higher gain settings the amp also becomes more and more

sensitive to noise from the car's electrical system. Try to run the gain at the lowest

setting possible for your system.

There is no correct gain

setting, because

speakers require

different power

demands to reach the

same output, the gains

most often need to be

used to compensate for

these differences. If you

tried to set all the gains

at half way you would probably find the system didn't sound very good. Using

good judgment and listening carefully to each speaker is still the best way to tune

a system.

A crossover is a device

that removes unwanted

frequencies from a

speaker or amplifier. A

tweeter can easily be

destroyed by bass notes

if they are not filtered

out. Likewise a

subwoofer will not

sound natural if it is

playing midrange

notes. A crossover

removes these sounds from the speaker. As you might guess, careful adjustment

in need to ensure that all the speakers are playing the right sounds and that you

are left with no "holes" or low spots in the frequency response.