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Connect stereo RCA output (L/R or SUB OUT)
of the head unit with INPUT (CH1 / CH2) of the amplifier
INTERCONNECTION
• Connect the RCA outputs of the head unit with the RCA jacks INPUT (CH /2) of the amplifier with appropriate
high-value RCA cables. If a separate SUB OUT from your head unit is available, use this as line output.
• Connect the subwoofers with the SPEAKER OUTPUTS CH1/2 + BRIDGED - and CH3/4 + BRIDGED -.
• Always ensure that the total impedance load per channel pair is not lower than 4 ohms.
Too low impedance cause high temperature and will shut down the amplifier operation.
• Always ensure the correct polarity of the speakers. The interchange of plus and minus cause total loss of bass playback and could
damage the speakers.
INPUT MODE SWITCH
• Select the 2CH position on the INPUT MODE switch.
CROSSOVER SETTINGS & BASS BOOST CONTROLLER
• The X-OVER switch of CH1/2 must be in position COPY. All settings of channel CH3/4 will be adopted for CH1/2.
Note: The controllers HIGH PASS and LEVEL INPUT are then without function.
• The X-OVER switch of CH3/4 must be in position LP/BP. The cut-off frequency is adjustable with the LOW PASS controller of CH3/4
and should be set between 60 to 100 Hz, depending on the size of the subwoofer.
The HIGH PASS controller CH3/4 works also as subsonic filter, that eliminates the ultra-low, not audible frequencies to
generate a bandpass signal. The subsonic frequency should be set between 15 to 40 Hz, depending on the size of the subwoofer.
Note: If this value is higher than the LOW PASS setting, no sound is audible.
• The BASS BOOST controller allows a bass enhancement up to +12 dB.
LEVEL CONTROLLER CH3/4 (SUBWOOFER 1+2)
• Turn the LEVEL INPUT controller of the amplifier to the MIN position.
• Turn the volume controller of the head unit to 80 - 90% of its full setting.
• Turn the LEVEL INPUT controller clockwise until you hear some distortion.
• Then turn back the LEVEL INPUT controller slightly until you hear a cleaner sound.
BASS REMOTE (SUBWOOFER 1+2)
• The enclosed BASS REMOTE CONTROLLER adjusts the bass-level e.g. from the driver's seat.
Please use only the enclosed bass remote controller and cable.
FUNCTIONAL INSTRUCTIONS
INTERCONNECTION EXAMPLE
2-channel-mode: 2 x Mono Subwoofer bridged
COPY
2CH
LP/BP
Connect Bass Level
Controller with the
enclosed cable
Subwoofer 1
4 – 8 Ohms
Subwoofer 2
4 – 8 Ohms
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