AAD SD-10 Powered Subwoofer Owners information

SD-10 Powered Subwoofer

Owner s Information'

SD-10 Powered Subwoofer Information

Important Instructions

1. Read your owner's manual carefully before using the product. Retain this

manual for future reference.

2. The subwoofer should be placed at a ventilated, dry and cool location, away

from any heat sources such as radiators or amplifiers. Do not obstruct the

subwoofer amplifier from ventilation. It is necessary that air can flow around

the finned heat sink on the rear panel of the amplifier.

3. Do not use the subwoofer near water or expose them to rain or moisture.

4. Always unplug the power cord first when making connections. Switch power on

only after you check and make sure all connections are made correctly.

5. Unplug the power cord from the outlet when you are not going to use the

subwoofer for a long period of time.

6. To clean, unplug the power cord from the outlet first. Use a damp cloth only to

wipe dust of the surface. Do not use any liquid cleaners.

7. Do not put coffee cups or other objects on top of the cabinet. They can be

shaken off when the subwoofer is in operation as it can produce a lot of

vibration.

Functions and Connections

Please refer to Fig.1 for functions on the amplifier.

Power switch on/off

Upper position: Power on

Lower position: Power off

Middle position: Auto on at this position the subwoofer amplifier is in a stand

by mode, awaiting an input signal. When there is no signal, the amplifier is

shut down. As soon as the signal appears, the amplifier switches on. If signal is

absent, the amplifier will shut down automatically after a pre-determined

period of time.

Volume Control

Use this control to balance the level of the woofer with the level of your main

speakers.

Crossover frequency control
If you are using small loudspeakers (4” to 6” woofers) in your main system,

you will need to set the crossover frequency at a high position (100 to 160 Hz).
If your main speakers have larger woofers (8” and above) you will need to set

the crossover frequency to much lower position (40 to 80 Hz). Generally, the

larger the speaker, the greater the low frequency output will be. If the
frequency control is set too high, the bass will appear “boomy” due to outputs

of subwoofer and main speakers overlapping each other. If it is set too low, the

bass will be ill defined and the subwoofer will sound detached from the rest of

the system.

Phase Control

Use this control to determine the best possible bass performance of your

system. There can be interference between your main speakers and subwoofer

at the frequency where they cross over due to placement, room acoustics and

type of main speakers used. By carefully positioning the subwoofer in the room

in combination with the level and crossover control, you should be able to get a

seamless transition between your main speakers and subwoofer. Start with the

full anticlockwise 0 position. This means that the subwoofer will push out

positive pressure wave corresponding to a positive electrical input. The 180

full clockwise position inverts this so the subwoofer will put out a negative

pressure wave. You can use this position if you are unable to get a good

integration between the subwoofer and main speakers.

High Level Inputs L&R

These inputs should be connected to the left and right speaker terminals of your

amplifier/receiver, if you intend to connect the subwoofer using this option

instead of the low-level RCA input connections.

6 High Level Output L&R

You could connect your main speakers from the subwoofer amplifier instead of

the main amplifier/receiver. Use this option if you are connecting the

subwoofer up via the High Level Input.

CAUTION! Do not use both low level and high level connection methods

simultaneously. This may cause damage to the subwoofer and your

amplifier/receiver.

7 Power input socket and Fuse

For continued protection, replace only with same type fuse.

8 Low level Input and Output

Connect this to the pre-amp output of your amplifier/receiver. If you do not

have a pre-amp output or a power amplifier input, you can connect up the

subwoofer using the Low Level Input/Output utilizing a tape input/output

amplifier/receiver. Connect the tape output to the Low Level Input on the

subwoofer, then connect the tape input to the Low Level Output on the

subwoofer. To switch the subwoofer into the circuit, switch the tape monitor

input on your amplifier/receiver.

Use this in conjunction with your receiver amplifier. Connect this output to the

power amplifier input of your amplifier/receiver.

Connection

Please see diagrams below for different method of connecting the subwoofer to

your main amplifier/receiver. It may be possible to use alternative connecting

methods. Please refer to the owner's manual of your amplifier/receiver or seek

professional advice from your retailer or installer.

CAUTION! Before switching power on, please make sure all connections are

made properly, i.e., positive to positive, negative to negative.

Connection method 3:

Connecting subwoofer from speaker outputs of receiver (see Fig. 4)

Placement of Subwoofer

The subwoofer can be placed virtually anywhere in your room without affecting

the stereo image of your main speakers. Placing the unit in a corner of the room

will yield the greatest bass output but may not provide the best sound, as this

position will cause maximum room mode resonance. You can start with this

position and then move the subwoofer to different areas until you find the sound

satisfactory. The best method is to try different positions. Keep a clearance of
100mm/4” from the wall or furniture to provide best performance.