15
2-Channel/Mode TWIN SUB with 2 Subwoofers
Interconnect cable checklist:
• Connect the head unit line outputs with good quality RCA to RCA cables to the INPUT
CH1&2 of the amplifier.
• Connect the Subwoofers with the terminal blocks (SPEAKER BRIDGED -
from Channel 1&2 and + BRIDGED - from Channel 3&4) of the amplifier.
• The minimum final speaker impedance must not be below 4 Ohm per channel pair. Too low
speaker loads result in too high heat dissipation and may cause the amplifier run into
protection.
• Please observe speaker channel and polarity as printed by the speaker terminal block.
Incorrect phasing of the speakers results in total loss of bass response.
Caution
Be careful not to connect speaker (-) to the ground or vehicle chassis.
X-OVER SELECT (CH1/2 & CH3/4)
•
In Mono/Subwoofer-Mode select the Lowpass-Position (LP), which eliminates the higher frequencies. The
recommended crossover frequency ranges between 60 - 100Hz, depending on the size and response of the
Subwoofers. The Lowpass adjustment CH3/4 can be done with the LOW PASS control. The HIGH PASS CH3/4 control
works in this case as Subsonic Filter. The Cut-off frequency should be between 10Hz and 30Hz depending on the size
of the installed Subwoofers. The HIGH PASS an LOW PASS on CH1/2 is in this mode without function.
INPUT LEVEL (CH1/2 & CH3/4)
• Turn the INPUT LEVEL controls on the amplifier to 4V position.
• Turn the head unit volume control to about 80-90% of its full setting.
• Turn the INPUT LEVEL controls clockwise until you hear some distortion.
• Then turn back the INPUT LEVEL controls slightly until you can hear clean sound.
BASS BOOST (CH3/4) / BASS REMOTE
• The BASS BOOST-Control increases the bass level up to +12dB. BASS BOOST on CH1/2 is without function.
• With the BASS REMOTE you can also adjust the bass level from driver´s seat.
Caution!
Please use the BASS BOOST carefully. The additional boost may result in clipping or overload.
TWIN SUB / INPUT MODE SELECT
• The TWIN SUB - switch from CH1/2 must be in “ON” - position and the INPUT MODE SELECT - switch
from the CH3/CH4 must be in “2CH” - position. Now both Subwoofers can be adjusted by the BASS REMOTE.
4 Channel Amplifier - Applications
SX-480 / SX-4120
Subwoofer 4 - 8 Ohm
Subwoofer 4 - 8 Ohm
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Connect RCA outputs
from head-unit with RCA
inputs (INPUT CH1/2).
BASS REMOTE
