12
CONNECTIONS & CONTROLS
FRONT PANEL
1
RCA INPUTS L & R (FRONT)
Low-level stereo RCA inputs for connection with the line-outs of the head-
unit
2
RCA INPUTS L & R (REAR)
Low-level stereo RCA inputs for connection with the line-outs of the head-
unit (only for SPA450Z)
3
RCA OUTPUTS L & R
Low-level stereo RCA outputs for connection with the line-inputs of another
amplifi er (only for SPA2100Z)
4
INPUT GAIN CONTROL (FRONT)
Input gain control potentiometer, to match the output voltage of the head-
unit’s RCA line-outs to the amplifi er input section
5
OPERATION MODE SWITCH
Slide switch to select the operation mode of the internal electronic cross-
over driving the FRONT channel section of the amplifi er
6
CROSSOVER FREQUENCY CONTROL SWITCH
Slide switch to adjust the crossover frequency of the FRONT channel
section of the amplifi er
7
INPUT GAIN CONTROL (REAR)
Input gain control potentiometer, to match the output voltage of the head-
unit’s RCA line-outs to the amplifi er input section (only SPA450Z)
8
CROSSOVER FREQUENCY CONTROL SWITCH
Slide switch to adjust the crossover frequency of the REAR channel
section of the amplifi er (only SPA450Z)
9
OPERATION MODE SWITCH
Slide switch to select the operation mode of the internal electronic cross-
over driving the REAR channel section of the amplifi er (only SPA450Z)
30A
L+
L-
R+
R-
POWERED BY
SPECTRON
POWER
PROTECT
FUSE
L+
L-
R+
R-
POWER
BRIDGED
+12V REM GND
FRONT
REAR
FREQUENCY
FRONT
RCA INPUT
L
R
L
R
RCA INPUT
MAX
MIN
GAIN
GAIN
MAX
MIN
XOVER
REAR
125Hz
65Hz 85Hz
REAR
HI
OFF LOW
FRONT
85Hz
65Hz
125Hz
LOW
OFF
HI
FREQUENCY
XOVER
XOVER
LOW
OFF
HI
125Hz
85Hz
65Hz
FREQUENCY
GAIN
L
R
MIN
RCA INPUT
MAX
R
R
FREQUENCY
XOVER
LOW
OFF
HI
125Hz
65Hz 85Hz
MIN
MAX
INPUT
OUTPUT
L
GAIN
L
POWERED BY
SPECTRON
20A
POWER
PROTECT
FUSE
BRIDGED
POWER
L+
L-
R+
R-
+12V REM GND
BRIDGED
POWERED BY
SPECTRON
20A
20A
+12V REM GND
POWER
PROTECT
FUSE
L+
L-
R+
R-
SPA250Z FRONT PANEL
6
5
4
1
SPA250-2100Z Manual.indd 12
02.06.2004 9:48:59 Uhr