Clarion APX490M Manual de usuario descargar pdf (Pagina 8)

151

Precise Frequency Selector Electronic

Crossover

Most manufacturers take the inclusion of an

electronic crossover for granted. A properly tuned

crossover can make or break the tuning of an

audio system. Clarion includes our PFS crossover

on our marine amps.

The concept of the PFS crossover is very simple

- you look up the crossover frequency you want,

then set the dial based on the number of clicks

of the control from one extreme or the other. The

control has 41 different positions. This way, if you

want the crossover set at 80Hz, you can look up

the frequency in the chart (see the mobile audio

amplifier section of this manual) and simply turn

the dial the appropriate number of clicks.

Where this feature really shines is when you

are building a 2-way system. PFS lets you set

the high- and low-pass crossover points at the

same frequency for smooth, accurate frequency

response without the need to run back and forth

from the listening position and the amplifier

installation location.

Thanks to the x10 multiplier switch found on the

rear channels of the APX490M, you can set the

crossover anywhere between 55Hz and 5.5kHz

for the maximum flexibilty.

Flexible Input Signal Sourcing

Clarion marine amplifiers are designed to be

easily integrated into any entertainment system.

With this concept in mind, we include a wide-

range variable gain control to allow level matching

to a variety of different sources, a source selector

switch on the APX490M and speaker level inputs

on both the APX290M and APX490M.

Speaker level inputs allow Clarion marine

amplifiers to be connected to any audio source -

from the most basic of OEM installed source units

to 120V 'home audio' style systems. This allows

you to add additional power to existing speakers,

add additional speakers or even add a subwoofer

without the need for expensive interfaces.

The source select switch on the APX490M allows

you to run a single pair of RCA cables from

a source unit to the amplifier, and have that

signal fed to all four channels of the amp. This

eliminates the need to Y-cables and cleans up

the installation.

Corrosion Resistant Aluminum Chassis

The heat sink of our marine audio amplifiers is

extruded from a large piece of aluminum before

it is machined and finished to our specifications.

This high-mass heatsink features fins down the

side where the output and power supply devices

are mounted to further assist in the radiation of

heat from the amplifier.

Conformally Coated Circuit Board

To further help resist the effects of humidity on

the electronic components inside Clarion marine

amplifiers, we apply a conformal coating to

the circuit board. This silicone-based coating

helps to prevent corrosion around the connection

between the main circuit board and electronic

components.

Marine Audio – Technologies

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