Control settings of the 4 Channel Amplifier:
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 FREQ - ADJUST control.
INPUT LEVEL (CH1/2 & CH3/4)
• Turn the INPUT LEVEL controls on the amplifier to 5V 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 MODE SELECT - switch from CH1/CH2 must be in “4” - position and the MODE SELECT - switch from the CH3/CH4
must be in “STEREO” - position.
Control settings of the Bass Amplifier (2 Channel Amplifier):
X-OVER SELECT
•
In 1 Channel/Mono-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 Subwoofer. The Lowpass
adjustment can be done with the FREQ - ADJUST control.
INPUT LEVEL
•
see descriptions for 4 Channel Amplifier above
BASS BOOST
• The BASS BOOST - Control increases the bass level at 45 Hz max. +12dB.
Caution!
Please use the Bass-Boost carefully. The additional boost may result in clipping or overload.
MODE SELECT
• The MODE SELECT - switch must be in “MONO” - position
4 Channel Amplifier - Applications
SX-460/SX-4100
One 4 Channel Amplifier in Stereo Mode (Front-/Rear- Speakers)
with
One 2 Channel Amplifier in Mono/Subwoofer Mode (Bass Amplifier)
Caution
Be careful not to connect speaker (-) to the ground or vehicle chassis.
Interconnect cable checklist:
•Connect the INPUT of the 4 Channel Amplifier to the head unit line outputs with good quality
RCA to RCA cables.
• Connect the OUTPUT of the 4 Channel Amplifier with the INPUT of the designated Bass
Amplifier (2 Channel Amplifier) with a further RCA cable.
• Connect the Front-/Rear Speakers with the terminal blocks (SPEAKER OUTPUT/ + CH1 -,
+ CH2 -, + Ch3 - and + CH4 -) of the 4 Channel Amplifier.
• Connect the Subwoofer with the terminal block (SPEAKER OUTPUT/ + BRIDGED -) of the
designated Bass Amplifier (2 Channel Amplifier).
•The minimum final speaker impedance must not be below 2 Ohms for the 4 Channel
Amplifier, the total impedance of the Subwoofer(s) must not be below 4 Ohms. Too low
speaker loads result in too high heat dissipation and may cause the amplifier run into
protection.
• If you use more than one speaker (Subwoofer), make sure that both are connected in
phase. Incorrect polarity of the speakers results in total loss of bass response.
30
