14
4-Channel Front-/Rear Speakers
Interconnect cable checklist:
• Connect the head unit line outputs with good quality RCA to RCA cables to the INPUT
CH1&2 / CH3&4 of the amplifier.
• Connect the Front-/Rear Speakers with the terminal blocks (SPEAKER CH1 -
+ CH2 -, + CH3 -, and + CH4 -) of the amplifier.
• The minimum final speaker impedance must not be below 2 Ohm per channel. 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.
4 Channel Amplifier - Applications
SX-480 / SX-4120
X-OVER SELECT (CH1/2 & CH3/4)
•
If larger than 20 cm speakers are used, the FULL position is recommended.
•
For all smaller speakers (Ø8.7cm - Ø16cm) the Highpass-Position (HP) is recommended, which eliminates the lowest
frequencies and protects the speakers from damage. Set the crossover-frequency between 60Hz - 150Hz, depending of
the size of the installed speakers. The Highpass adjustment can be done with the HIGH PASS - ADJUST control.
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 (CH1/2 & CH3/4)
• Turn the BASS BOOST control into “0dB” - position.
MODE SELECT
• The TWIN SUB - switch from CH1/CH2 must be in “OFF” - position and the MODE SELECT - switch from the
CH3/CH4 must be in “4CH” - position. When you only use one RCA to RCA cable the INPUT MODE SELECT switch
should be set on 2CH - position. The RCA to RCA cable must be connected wih the input of CH1&2.
Caution
Be careful not to connect speaker (-) to the ground or vehicle chassis.
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Connect RCA outputs
from head-unit with RCA
inputs (INPUT CH1/2
and CH3/4).
Rear-Speakers 2 - 8 Ohms
Front-Speakers 2 - 8 Ohms
