1.
LEVEL CONTROL: This control allows you to increase or decrease the subwoofer volume. The
level will need to be set initially at a particular position. This is not meant for use as a volume
control for constant use. You should be able to control the subwoofer volume by the master
volume on your preamplifier or amplifier.
2.
PHASE SWITCH: This switch has two positions marked 0 (deg.) and 180 (deg.). When you are
playing the subwoofer with your existing amplifier and speaker system which has, say, a fairly
good bass response, it might happen that turning the subwoofer on weakens the bass instead of
reinforcing it. This is because the low frequency signal produced by your existing system and that
produced by your subwoofer are wholly or partially 'out of phase’. In such a situation, change the
position of the Phase Switch.
Note: There is no hard and fast rule that governs phase setting. Do experiment for best results.
3.
CROSSOVER FREQUENCY CONTROL: A subwoofer generally reproduces frequencies from
150 Hz and below. The lowest frequency that can be reproduced is determined by the
characteristics of the speaker unit itself while the upper frequency limit (in this case 150 Hz) is
deliberately imposed. With your subwoofer, the upper limit (corner frequency) can be varied
continuously between 50 and 150 Hz. There is no rule that governs the corner frequency setting.
Do experiment with the range provided till you locate the point at which the overall sound of your
audio system is balanced.
Note: Equal demarcations from 50 ~ 150 Hz correspond to 75, 100, 125 Hz.
4.
LINE IN: Connect the 'Line Out' of your preamplifier (or 'Subwoofer' channel of your Home
Theater receiver) to the Line In, with the RCA to RCA cables supplied.
5.
POWER SWITCH: This is a rocker type switch that turns on power to the system.
6.
FUSE: This is a safety device that protects the equipment and also prevents fire hazards. Should
the fuse need to be replaced unscrew the cap and replace with only the same type and rating of
