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FUNCTIONAL INSTRUCTIONS
FEATURES AND OPERATIONAL CONTROLS
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The BASS LEVEL CONTROLLER port is for the enclosed bass remote in LP/BP mode. With this bass remote controller you
are able to adjust the bass level e.g. from the driver’s seat. Please connect only the enclosed bass remote controller and cable.
POWER/PROTECT
If the POWER LED lights up, the amplier is ready for operation.
If the PROTECT LED lights up, a malfunction is indicated. Refer in this case to the chapter TROUBLE SHOOTING.
The TWIN SUB switch in position ON effectuates, that the bass remote controller adjusts the level simultaniously on both chan-
nel pairs (CH1/2 & CH3/4) in mono-bridge mode with two subwoofers. Also all crossover settings (BASS BOOST, LP/BP, HP,
LEVEL, X-OVER) of CH3/4 will be synchronized with CH1/2. In switch position OFF, the bass remote works only on CH1/2.
The CH1/2 and CH3/4 BASS BOOST controllers adjust the bass boost enhancement continuously from 0dB to +18dB at
45 Hz for the relevant channels (Channel 1/2 or 3/4).
The X-OVER CH1/2 and CH3/4 switch selects the required operation mode of the amplier on the regarding channels (Channel
1/2 or 3/4).
LP/BP: Lowpass mode (The higher frequencies will be eliminated. Adjustable by the lowpass controller.)
The HP/BP controller works in this operation mode as subsonic lter and eliminates the lower frequencies (Bandpass-Mode).
NOTE: If this controller is turned to a higher value than the lowpass controller, no sound is hearable.
HP: Highpass mode (The lower frequencies will be eliminated. Adjustable by the HP/BP controller.)
FULL: Fullrange mode (The whole frequencies will be amplied).
The CH1/2 and CH3/4 LP controllers adjust the cut-off point of the frequency range to above for the relevant channels (Channel
1/2 or 3/4). The cut-off frequency is continuously adjustable from 30 Hz to 150 Hz.
The INPUT MODE switch must be in 2CH position, if you connect only one RCA stereo audio cable with the CH1/2 line inputs.
Select the position 4CH, if you connect two RCA stereo audio cables with the CH1/2 and CH3/4 line inputs. The fader function
of your head unit works only in the 4CH mode.
If you have selected the 2CH mode, the input signal of LINE INPUT CH1/2 will be routed to the channels 3 and 4. This means
only one RCA stereo audio cable is required. When you operate two subwoofers, you can also use the subwoofer output from
the head unit in this conguration.
1 76 10 4 9 113 85
POWER INPUT
FUSE
SPEAKER OUTPUT
BRIDGED
PROTECT
POWER
FULLHP
LP
CH3/4
HP/BP LEVEL
BASS LEVEL
CONTROLLER
AUTO TURN ON
(ONLY IN HI LEVEL INPUT MODE)
0dB 18dB
LINE OUT
CH2CH1
LEVEL
INPUT
X-OVER
MODE
10Hz 1.2kHz
30Hz 250Hz
CH3
CH4
MIN MAX
OFF
ON
LOW
HI
BASS BOOST
L
R
GND +12VREM
FULLHPLP/BP
LP
HP/BP LEVEL
0dB 18dB
X-OVER
MODE
10Hz 1.2kHz
30Hz 250Hz
MIN MAX
BASS BOOST
LINE IN
CH1
CH2
2CH4CH
CH1/2
INPUT MODE
BRIDGED
CH4CH3
ZRX9404
LP/BP
SUB
TWIN
OFF
ON
BLUE / WHITE
LOG0
2 12
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