Harman Kardon SUB-TS18 Page 11 Service Manual Download

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OPERATION 13

OPERATION

Move the

Master Power Switch

‚

(marked

Power

) to the “•” (On) position.

The SUB-TS18 subwoofer will automatically
turn itself on or go into Standby mode,
depending on whether or not a signal is
being sent to it by your receiver or surround
processor, and provided that the

Audio-

Sense On/Off Switch

is moved down

so that it is in the

AUTO

position.

When your receiver or amplifier is off, or is
not sending program material to the sub-
woofer, the subwoofer will be in Standby
mode and the LED indicator on the top
of the subwoofer will turn amber. When the
subwoofer senses an audio signal, it will auto-
matically turn itself on and the LED indicator
will turn blue. If the subwoofer does not
sense a signal after approximately 20 minutes,
it will automatically go into Standby mode.

When the

Audio-Sense On/Off Switch

is switched to the

position, the sub-

woofer will remain on, whether or not pro-
gram material is playing, and the LED indica-
tor will remain lit blue.

If your receiver, processor or amplifier is
equipped with a compatible trigger output,
you may connect it to the SUB-TS18’s

External Trigger Input

. When you turn

on your component, if you have set it up cor-
rectly, it will send an electrical trigger signal
to the SUB-TS18, which will cause the
subwoofer to turn itself on, even when the

Audio-Sense On/Off Switch

has been

placed in the

AUTO

position and no audio

signal is detected.

The trigger signal must be between 3 and 30
volts, although it may be an AC or DC signal,
and an AC signal may be 50Hz or 60Hz.

If you’ll be away from home for an extended
period of time, or if the subwoofer will not be
used, switch the

Master Power Switch

‚

to the

OFF

position.

Volume

Volume can be adjusted using the

Sub-

woofer-Level Control

, as shown.

Turn the control knob clockwise to
increase the volume of the subwoofer,
and counterclockwise to decrease the
subwoofer’s volume.

Additional Bass Adjustments

In addition to the volume adjustments described
previously, the SUB-TS18 subwoofer includes
a

Phase Switch

∞

and a

Filter Switch

™

that can be used to adjust the bass

response to suit your listening environment
or taste.

In most situations, the

Phase Switch

∞

should be left in the

NORMAL

position.

If you suspect that the subwoofer is playing
out of phase with the other speakers, which
would tend to diminish bass response, try
placing this switch in the

REVERSE

position. There is no harm in experimenting,
and you may return the switch to the

NORMAL

position at any time. If you

rearrange your room and reposition the
speakers, it would be a good idea to check
whether they are in phase by flipping this
switch.

The

High-Cut (Low-Pass) Filter Switch

™

limits the frequencies of the audio signal

inputted to the subwoofer to the low fre-
quencies that the subwoofer reproduces
best. This allows the subwoofer to perform
more efficiently, and with superior bass
reproduction, minimizing distortion that might
occur if the subwoofer attempted to repro-
duce higher frequencies. This switch should
be left in the

position,

except

1. When the

SUB Input

is being used,

in which case it has no effect, or

2. When the

Speaker-Level Inputs

or the

Line-Level Full-Range Inputs

are being used with a crossover or

filter aboard the receiver or processor.