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CONNECTIONS & CONTROLS
15
REAR PANEL SP-N4107 + SP-N4207
15 SPEAKER OUTPUT TERMINAL
Output terminal to connect the loudspeaker cables from the speakers to the
amplifier
16 FUSES
ATC fuses for protection of the amplifier electronics against overload or wrong
operation
17 +12V POWER INPUT TERMINAL
Terminal to connect the amplifier to the positive +12V voltage of the car battery
18 "REM" INPUT TERMINAL
Terminal to connect the amplifier to the automatic (remote) turn-on / turn-off lead
of the head unit
19 "GND" POWER INPUT TERMINAL
Terminal to connect the amplifier to the negative or chassis ground of the vehicle
16
17 18 19
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INFORMATION ABOUT WIRES
INSTALLATION
To install this SPECTRON amplifier properly, power cables and other additional accessories
are required. These accessories are not part of the set content and need to be purchased
separately. Ask your SPECTRON dealer for assistance.
To obtain best performance and power output from your amplifier, it is recommended to
use high quality accessory material only. For trouble free performance also consider a safe
mounting of the amplifier in your own interest. Sufficient ventilation, convenient accessibility
of all the side panel controls are further prerequisites that should be thought of, before any
installation work is attempted.
Please note that – due to potential interference problems with existing car electronics – the
routing of the RCA signal cables and the chassis ground connection of your amplifier are
important if not crucial, for a noise free and stable performance of this amplifier.
MAIN POWER CABLE CROSS SECTION
The main power cable cross-section used for this SPECTRON amplifier should not be less
than 10 mm
for 5 m of total length. If you plan on to use the amp in bridged mode driving
2
a subwoofer, or if two amplifiers are part of your system install, the minimum recommended
power cable cross section for safe operation is 20 mm
have the same cross section like the main +12V cable to be used.
These recommendations guarantee trouble free operation of your amplifier(s), giving you
full power output and lowest THD. Using main power cables with smaller cross sections
may result in over-heating and early shutdown of internal amplifier electronics and elevated
distortion.
RCA INTERCONNECTS
Use at least double shielded RCA interconnect cables. Keep in mind, that the RCA
interconnects should always be kept far away from any potential sources of electrical
interferences, i.e. try to avoid crossing of main wire harnesses that are part of electronic
management systems.
MINIMUM SPEAKER IMPEDANCE
The internal amplifying circuitry and the heat dissipation capacity of this amplifier's heatsink
has been designed to cope with 2 ohm impedance loads in stereo mode or 4 ohms in bridge
mode. Therefore, you can drive 4 to 2 ohm satellite speaker systems – or 4 ohm subwoofer
systems in bridged operation mode.
SP-N1507 2 ohms mono
SP-N2107 2 ohms stereo / 4 ohms bridged
SP-N2207 2 ohms stereo / 4 ohms bridged
SP-N4107 2 ohms stereo / 4 ohms bridged
SP-N4207 2 ohms stereo / 4 ohms bridged
2
. The cable to chassis ground must
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