3.
Automatic control
：
When setting to AUTO
，
the amplifier will be in automatic control status, here the amplifier will
automatically turn on once the audio signal is detected at the line level input or high level/speaker
level input. When set to ON the automatic control will be shut down. When set to OFF the
amplifier will be shut down.
4.
Phase control
：
This control can change the phase of the subwoofer. Generally, the phase should be set in the left
of 0°position; it may cause more or less mid-low frequency if the phase is set in the 180°position.
5.
Low gain control
：
Different low gain control allows you to set anywhere between 0-6dB. Increasing gain will allow
more output of mid-low frequency, and decreasing gain will allow less output of mid-low
frequency.
6.
Line level input
：
These RCA terminals are for the line level input signal coming from an AV Receiver, AV
Amplifier or preamplifier. Note! Do not connect the high level
/
speaker level signal to these RCA
terminals.
7.
Line level output
：
These RCA terminals can be connected to another power amplifier. A full range signal is sent
through these terminals.
8.
High level/speaker level input
：
These terminals are for the signal input from power amplifier or speaker level. Note! Do not use
the line level input and high level/speaker level input both simultaneously.
9.
High level/speaker level output
：
：
：
：
These terminals are to be used for connecting satellite speakers/main speakers. These terminals
can be used only when using high level/speaker level input.
10.
High pass crossover control
：
This is a switch for high pass crossover. This crossover limits the low frequencies, which has 80Hz
and 120Hz two options. The crossover can be used only when using high level/speaker level input
and high level/speaker level output. Note
！
Do not operate the switch of high pass crossover when
amplifier is working.
11. Power switch.
12. Power input terminals.
13. Working indication.
THE PLACEMENT AND INSTALLATION OF SUBWOOFER
The size of the room, the treatment of the wall and floor surfaces, the position of furniture and the
placement location of the subwoofer in the room are all factors to achieve optimal sound reproduction.
Please carefully read the following references
：
●
If placing the subwoofer in a corner it will make the subwoofer sound louder and boost the very
lowest frequency. If placing the subwoofer away from walls it will make the subwoofer sound
lower. So we recommend that you look for the optimal position according to the size and overall
arrangement of the room. The optimal position can be set up as long as you experiment by moving
the subwoofer a number of times.
●
If the floor is too smooth it will make the sound quality of the subwoofer muddy. The sound
quality will improve if you place a small rug on the floor.
●
The subwoofer should be located on a flat stable floor; spikes should be installed and adjusted to
suit.
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