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How to use the controls

How to use the SUB VOLUME CONTROL knob, CROSSOVER FREQUENCY knob

and PHASE switch.

The VOLUME CONTROL, FREQUENCY knob and PHASE switch can be adjusted to

match the condition of the listening room and/or the characteristics of the left and

right speakers.

Due to the positioning of the subwoofer in the room and the associated room

boundaries, the available bass response from the existing speakers and whether

of not the filtered connection (Nominally 100Hz is used), the actual settings on the

subwoofer control panel will vary considerably.

The SUB VOLUME CONTROL and the CROSSOVER FREQUENCY knobs should be

used together when setting the correct bass response required. For example,

raising the volume level will also raise the effective system crossover point, while

reducing the volume has the converse effect of lowering the frequency range of

the subwoofer. This is caused by the way the various responses and outputs blend

together in the listening environment.

Initially set the crossover frequency fairly low, e.g. 50-60Hz, and use the volume

control knob on the sub to set the low bass level required, When the correct

balance is almost achieved, the crossover level and volume level maybe adjusted

together to fine tune the sound and achieve the cleanest, most extended and

suitably powerful bass.

The ideal is for a seamless blend of extended low bass from the subwoofer leaving

the clean upper bass response of the stereo system largely undisturbed.

Typical Control Positions

Front speaker

Large Speaker

Medium Speaker

Small Speaker

Caution

An excessive input level to the subwoofer may impair the sound quality or damage

the unit. Do not increase the output of the amplifier to a high level while the low-

frequency level is enhanced by the amplifier's tone control or loudness control.

Crossover

40 - 60Hz

60 - 80Hz

80 - 100Hz

Phase

Normal 0°

Sub Level