ARC Audio X2 1100.5 Gebruikershandleiding - Pagina 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
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 Range and Function Controls
The X2 1100.5 includes the option for High-Pass, Low-Pass,
Band-Pass or full range operation from Channels 1 and 2.
Channels 3 and 4 offer High-Pass or Full-Range Operation.
The subwoofer channel has a Low-Pass crossover in
operation at all times.
For Channels 1 and 2 set the Crossover Function switch
to LOW-BP and set the BANDPASS switch to ON in order
for both the High-Pass and Low-Pass Filters to function
simultaneously. The LP RANGE Switch in the X1 setting offers
a crossover range of 50 to 500 Hz. In the X10 position, the
Low-Pass crossover range is 500 to 5 kHz. When the Crossover function switch is set to HIGH, only the High-Pass filter is
active.
On Channels 3 and 4, the Crossover Function switch selects between Full-Range and High-Pass filtering.
Page 4
LP
HP
BANDPASS
FREQ Hz
FREQ Hz
OFF
ON
(CH 1/2)
SIGNAL
DETECT
DC DETECT
(CH 1/2)
FREQ Hz
(CH 1/2)
CH1
CH2
CH1-2
LP RANGE
X1
LOW-BP
FULL
X10
HIGH
AUTO SENSE
INPUT
SELECT
OFF
CH1-2
SUB
CH1-2
HP
LP
BANDPASS
FREQ Hz
FREQ Hz
OFF
ON
AUTO SENSE
SIGNAL
DETECT
OFF
DC DETECT
CH1-2
LP
HP
BANDPASS
LP RANGE
FREQ Hz
OFF
X1
ON
X10
AUTO SENSE
SIGNAL
DETECT
OFF
DC DETECT
CH3
SUB
CH4
CH3-4
CH1-2
CH3-4
LP RANGE
CH1-2
X1
LOW-BP
FULL
CH3-4
X10
HIGH
INPUT
SELECT
CH1-2
SUB
CH1-2
LOW-BP
FULL
CH3-4
HIGH
INPUT
SELECT
CH1-2
SUB
CH3-4
CH3-4