ARC Audio X2 850.5 Manuel du propriétaire - Page 4
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Input Section
This X2 Series amplifier is equipped with a balanced
differential input stage that is compatible with any analogue
source including Balanced and Unbalanced RCA, Common
ground speaker level output and Bridged Tied Load (BTL)
outputs common to many OEM head units. The RCA pigtails
included with these amplifiers are intended to be used with
the speaker-level outputs of a radio or amplifier. These pigtails
include a divider network molded into the RCA end that
reduces the voltage of the signal from the source. If you are
integrating into an OEM system with balanced or common
PWR/PROT
ground line-level signals you should not use these Pigtails.
In this case it is recommended that you use an appropriate RCA cable with one set of ends removed as inputs for the
amplifier.
Gain / Sensitivity Controls
Because of the wide range of head unit output configurations
available, all ARC Audio amplifiers have an adjustable input
sensitivity or "Gain" control. The gain is not a volume or a
power limiting control like a throttle. It makes the amp more
sensitive to input from the source. With the gain up the amp
will reach full output at a lower volume setting on the deck
and becomes more sensitive to noise from the car's electrical
system. Try to run the gain at the lowest setting possible for
you system.
There is no correct gain setting. As different size and
shape speakers require different amounts of power to reach the same output, the gain settings need to be adjusted to
compensate for these speaker efficiency differences. If you tried to set all the gains at half way you would probably find
the system didn't sound very good. Use good judgment and optimize each channel carefully as you configure the system.
You want to set the gains to maximize the output of the amplifier, while producing minimal distortion for your given source
unit and music selection.
Crossover Controls
A crossover is a circuit that limits what frequencies are
produced by the amplifier, and subsequently, the speaker(s)
connected to the amp. A tweeter can be destroyed by bass
information. Those frequencies need to be filtered for proper
operation. Likewise, a subwoofer will not sound natural if it
is playing midrange frequencies. A crossover removes these
sounds from the signal going to the speaker. As you might
guess, careful adjustment is required to ensure that all the
speakers are playing in the correct frequency range and that
the net frequency response of the total system is smooth with
no over- or under-lap.
Crossover Function Controls
The X2 850.5 includes the option for full-range or high-
pass filtering on the four main channels and an adjustable
crossover on the subwoofer channels.
The crossover functions for Channels 1 and 2 can be
configured independently of Channels 3 and 4 for function
and frequency using their respective function control switches
and frequency adjustment potentiometer.
In FULL Mode, the signal from the RCA inputs passes
unaltered through to the outputs. In HIGH Mode, a high-pass
crossover is applied to the signals at the frequency set by the adjustment potentiometer.
Page 4
2 CH INPUT
CH1
CH2
CH 1/2
AUTO SENSE
SIGNAL
DETECT
OFF
DC DETECT
CH 1/2
AUTO SENSE
SIGNAL
DETECT
OFF
DC DETECT
CH 1/2
AUTO SENSE
SIGNAL
DETECT
OFF
DC DETECT
CH3
SUB
CH4
SUB
CH 3/4
CH 1/2
CH 3/4
CH 3/4
CH 1/2
CH 3/4
CH 3/4
CH 1/2
CH 3/4