• amplifier functions & connections •
Micro Sub 8 • page 3
1. LEVEL CONTROL: This control allows you to set the subwoofer volume
relative to the level of other speakers in your system. The level will
need to be set the first time only. 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 AV receiver.
2. PHASE SWITCH: This switch has two positions marked 0° and 180°. 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. FREQUENCY CONTROL: A subwoofer generally reproduces frequencies
from 150Hz 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 150Hz) is deliberately imposed. With your
subwoofer, the upper limit (corner frequency) can be varied continuously
between 50 and 150Hz. 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.
4. INPUT: Connect the stereo output of your preamplifier to the left and right
inputs, with RCA to RCA cables.
5. INPUT LFE : This is a ‘Low Frequency Effects’ input. If you are using an AV
receiver, connect the line level output of your AV receiver marked ‘SUB OUT’
to this input. This input has +10dB or 3 times higher gain than the left and
right input. Always keep frequency control to max position when using this
input.
6. MAINS OVERVOLTAGE PROTECT INDICATOR: The Micro Sub 8 has a
protection feature which automatically shuts off the power when the mains
voltage crosses a safe upper limit. In such case, this LED will glow. Normal
operation will resume when the over-voltage condition is removed.
7. (IEC type) MAINS SOCKET: This is a fused 3-pin IEC type AC socket for
connecting to a wall outlet with the cable supplied. Ensure that the wall
outlet is properly earthed. This is in the interests of your own safety in
the event of any fault. Also ensure that the earth pin of the outlet is not
directly connected to equipment like computers, air-conditioners, etc which
can cause humming noise.
8. POWER SWITCH: This is a rocker type switch that turns on power to the
system
