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4. CONTROLS & CONNECTIONS
4-1. SK-M5001D control

RCA JACK INPUT
Low Level Rca Input will accept the signal from the output of 
head units. Plug in Rca jack cables from the head unit.

HI INPUT
Connect factory system’s headunit.

GAIN CONTROL ( 6V ~ 0.2V )
The gain control adjusts the gain level. so that this is used to 
match the signal level of different headunits.

SUBSONIC FILTER ( 10Hz ~ 50Hz @ 24dB / Oct slope )
Control the high Pass point for the speaker outputs 
to eliminate extreme low frequencies.
 
LOW PASS FILTER  ( 20Hz ~ 200Hz @ 24dB / Oct slope )
The crossover features a steep 24dB oct slope 
Linkwitz-Riley low pass crossover ensuring that only 
the lowest frequencies are reproduced by the amplifier. 

REMOTE CONTROL PORT
This port is for connecting the remote gain control.
Remote control can be mounted around driver’s seat for easy access.
 

RCA JACK INPUT
Low Level Rca Input will accept the signal from the output of 
head units. Plug in Rca jack cables from the head unit.

HI INPUT
Connect factory system’s headunit.

GAIN CONTROL ( 6V ~ 0.2V )
The gain control adjusts the gain level. so that this is used to 
match the signal level of different headunits.

X-OVER ( 50Hz ~ 500Hz @ 12dB / Oct slope )
The crossover features a steep 12dB oct slope 
Linkwitz-Riley crossover ensuring that only 
the highest or lowest frequencies are reproduced by the amplifier.

X-OVER SLECTOR SWITCH ( HPF/FULL/LPF )
Selected x-over is in effective.

MODE ( 2CH/4CH )
Selecting 2ch or 4ch input
 

Remote Turn on

+12V SOURCE

4-3. Power, remote & ground connection

4-2. SK-M4004D control

BATTERY

Fuse

Fuse Rate

SK-M5001D : 50A

SK-M4004D : 40A

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