IN-OUT PANEL - FUNCTIONS
DESCRIPTION
SXR2
is a 2 way electronic crossover designed to handle a Front + Sub system. It has an input (IN) for the signal coming
from the source and four outputs; two are main outputs, two are secondary. The first of the two main outputs (SUB)
provides a subwoofer Lo-Pass signal; the other (HI-FRONT) gives a Hi-Pass signal suitable to drive a Front system filtered
by passive crossover.
The HI-REAR output (one of the two secondary ones) has to be used for the realisation of a Rear system to be filtered by
passive crossover and supplies a unitary gain Hi-Pass signal taken from Front section (HI-FRONT); Hi-Pass signal has the
same cut-off frequency as Front section itself. The BYPASS output permits to send the full range signal in the input to
another amplifier installed after the crossover.
SXR2
controls panel is divided in four sections: HI-PASS, SUB, BOOST and AMBIENT.
HI-PASS and SUB sections have a five step switch for five cut-off frequencies (HI-PASS: HI; SUB: LO) and a level
control. SUB section also has a switch for signal phase inversion between 0° and 180° (PHASE), that allows to align
subwoofer and front, and a switch to choose functioning mode (MONO/STEREO).
BOOST section widens and increases subwoofer frequency response. It consists of a boost filter with adjustable gain,
whose frequency is set at 45 Hz (LEVEL 45 Hz).
Acting on the sum and the difference between the two stereo channels, AMBIENT section widens sound image. It has an
adjustable level control (LEVEL) and an ON/OFF switch.
FILTER TYPOLOGY
SXR2
filters have Bessel configuration with low group delay, which insures correct acoustic alignment. Filters slope
is 18dB/Oct.; it provides speakers with safer and more linear functioning than cuts with lower slope can do and limits
the overlap of their working areas. Cut-off frequency can be chosen among five pre-set values for HI-PASS and SUB
sections; this makes SXR2 suitable to every speakers system avoiding problems created by linear adjustment. Since
the latter occurs through potentiometers, it is inaccurate both for frequencies value and for filters correct functioning.
The use of very low tolerance components (1% resistors and capacitors) insures precise and constant filters
performances.
PRECAUTIONS
SXR2 crossover must be installed only in vehicles with 12VDC power supply voltage with negative to ground.
It is important
NOT TO USE
any other kinds of electric power supply in order to avoid fires or possible
electrocutions.
Avoid to install the device where temperature is below 0°C or above 55°C and in case of extreme humidity
(<10% or >90%).
Avoid to install it in dusty places or in contact with liquids.
INSTALLATION
This crossover must be fixed through the four screws and spacers given with it. In order to get the best installation, we
recommend the use of
audison cable
products, that can satisfy all needs.
CONTROLS PANEL – FUNCTIONS
1.
HI:
It adjusts Front system cut-off frequency (FRONT).
2.
HI-PASS LEVEL:
It adjusts Hi-Pass section output level.
3.
LO:
It adjusts subwoofer cut-off frequency (SUB).
4.
SUB LEVEL:
It adjusts the output level of the SUB section that drives the subwoofer.
5.
PHASE:
It permits to invert the phase of the signal in the SUB output between 0° (0) and 180° (-
ψ
)
6.
MONO/STEREO:
It selects subwoofer functioning mode as Mono or Stereo.
7.
BOOST LEVEL 45Hz:
It increases the subwoofer response at 45Hz fixed frequency.
8.
AMBIENT LEVEL:
It adjusts sound image width (staging).
9.
AMBIENT ON/OFF:
It bypasses AMBIENT LEVEL control.
10.
ON (green led):
It indicates crossover is on.
1
7
10
3
2
5
6
50
60
80
100
120
HI
-Hz-
HI-PASS LEVEL
50
60
80
100
120
LO
-Hz-
SUB-LEVEL
LEVEL
MONO
STEREO
ON
OFF
ON
H I - PA S S
S U B
A M B I E N T
B O O S T
LEVEL
45 Hz
S X R 2
PHASE
ϕ
0
8
4
9
1.
POWER
: Power supply sockets. Connect the positive pole cable (+) and the negative pole cable (-) coming from
battery to them. Respect polarities.
2.
REM:
Socket to connect the Remote cable coming from source that controls the crossover switching on.
3.
MUT:
Socket to connect the Mute cable coming from source or from hand-free telephone.
4.
BYPASS:
Preamplified outputs; they permit to supply another amplifier that is after the crossover with a full range signal.
5.
IN:
Crossover preamplified inputs. Connect cables coming from source preamplified outputs to them.
6.
SUB:
Preamplified outputs to connect to subwoofer amplifier. They supply a 18dB/Oct., Lo-Pass filtered signal.
7.
HI-REAR:
Preamplified outputs to connect to Rear system amplifier. They supply a 18dB/Oct., Hi-Pass filtered signal.
8.
HI-FRONT:
Preamplified outputs to connect to Front system amplifier. They supply a 18dB/Oct., Hi-Pass filtered
signal.
1
2
S X R 2
P O W E R
R E M M U T
L
R
3
4
5
6
7
8
HI-FRONT
HI-REAR
SUB
IN
BY-PASS
