SUBWOOFER
INSTRUCTIONS
SW - 400
INSTRUCTIONS POWERED SUBWOOFER
Congratulations on choosing an "Aaron" subwoofer. We at Aaron have gone to the upmost trouble
to ensure your continuing satisfaction for many years to come. Every individual subwoofer unit must
meet our exact specifications with regard to performance and craftsmanship before it is allowed to
leave our factory.
SAFETY INSTRUCTIONS
Make sure the voltage selector is set to your country`s voltage. (Refer Fig. 1).
Always connect the unit to a standard AC wall outlet.
Run the power cord so it will not be damaged by being pinched, stretched, cut or walked on.
Never connect other inputs to the electricity mains.
When removing the power plug don't use wet hands or pull the plug out by the cord.
Remove the power plug from the wall if it is not in use for an extended period. For example when you
go away on holidays.
Whenever changing wires, plugs etc., always have the power turned off.
If water is spilt on the unit always take extreme care to be sure the unit is completely dry before
reconnecting it.
Don't operate the subwoofer too close to heaters.
If the Subwoofer makes a slight distortion noise you have the volume too high and have reached it's
maximum output limit. Please lower the volume control.
Never use more than a small adjustment on your amplifier`s tone controls especially at high volumes.
Turn down the volume when changing a record or switching from one source to another.
Don't push in the speaker diaphragms with any force.
Do not expose the diaphragms to direct sunlight.
It is not advisable to place the unit in a damp environment.
Don't use solvents to clean any part of the unit.
Tampering with the internal parts of the unit may cause an electric shock or damage, not covered by
warranty.
If a part fails, insist on a genuine replacement.
Do not put your ears too close to the speakers or play them too loud for extended period of time as
this may cause partial hearing loss.
Beware! Cats love sharpening their claws on speaker cloth.
When you get your subwoofer check that it has not been damaged in transit. Please keep the original
carton in case of future need, it folds flat and takes up little space.
SUBWOOFER PLACEMENT
CONNECTING YOUR SUBWOOFER
Warning: the cooling fins on the back of the unit must be free so air can circulate around
them.
This unit can be placed on its side as well as upright but never place it on it's back or front.
Placement can completely alter the sound of your speakers. At Aaron we spend a lot of time and
effort to design speakers that are not so position critical, but there will still be some variation from
one position to another. Due to the many different listening environments it is impossible to make
cut and dry rules for the best position for your speakers. Put them where they sound best to your
ears, by using trial and error.
We can however mention some helpful hints to speed up your positioning of the subwoofer.
Placing it near corners will increase the bass, where as if you mount it on a cabinet or put it on a
stand it will have less bass. If you have shaggy carpet you may wish to attach spikes at the base. A
bare timber floor may often require you to put rubber feet under the subwoofer. A double brick
home will tend to increase the bass output where as a timber house lessons bass. A brick veneer
home will be somewhere in between. Also the amount of soft furnishings (carpet, curtains, lounge
etc.) in your room changes the sound, the use of more soft furnishings will deaden the sound.
Connection is quite simple and can be done by the "high level" input or by the low level input.
Either by using bared twin wire from your amplifier speaker output (high level) or by RCA leads (low
level). Please note: High level is the best choice as the higher voltage levels are less susceptible
to noise and earth loops.
It is possible to run this subwoofer from the output of one amplifier channel but the
subwoofer's volume control will have to be set higher. When using two subwoofers best results
are obtained by connecting each unit to a different channel on the amplifier.
We do not supply speaker wire or RCA cable with the subwoofer because every installation is
different. It is important to use good quality cable and keep the length as short as practical.
In the case where cable is already wired through the house or the cable has no markings
contact your Hi Fi dealer for advice.
Low Level Connection
The most usual method to connect the AV amplifier to the subwoofer is via the amplifier`s
subwoofer output to the subwoofer`s low level input. Often there will be two RCA connections on
the back of the amplifier, which in turn will be connected directly to two RCA low level inputs on the
subwoofer.
If your amplifier has only one RCA output, it is possible to connect it to just one low level input
on the subwoofer, (it doesn`t matter which low level line input you use). If you have to turn the
volume control up too high on the subwoofer to get the desired output, you can increase the input
level to the subwoofer by using a "1 x RCA to 2 x RCA" connecter cable.
High Level Connection (Preferred Option)
It is possible to connect the front/main speakers or satellite speakers to speaker A on the
amplifier and the subwoofer can be connected to speaker B, if your amplifier has this facility. The
other method is to connect the subwoofer to the same outputs that you use to connect your
front/main speakers (in parallel). Because of the high input impedance of the subwoofer, connecting
your subwoofer this way will not effect the output of your amplifier at all.
Another method of connection is to connect the amplifier main speaker output directly to the
subwoofer and to use the filtered high pass filter output to connect to your front/main speakers. If
you use this method of connection the very low frequencies (below approx. 80Hz) will be removed
from the signal to your front/main speakers. This kind of connection is handy if you are using small
satellite speakers that may benefit by being protected from deep bass.
When connecting the speaker leads to the subwoofer it is very important that the positive (+)
terminal on the amplifier is connected to the positive terminal on the speaker. In most cases this
means the red terminal on the amplifier is connected to the red terminal on the subwoofer.
Likewise, the black terminals are connected to each other. Failure to do this could result in damage
to your amplifier or reduced bass performance. Never allow the two conductors in the speaker
cable to touch each other, this could cause damage to your amplifier.
TIP: If you use the high level connection method, the amplifier should be told you have
large main speakers and no subwoofer.
CONTROL FUNCTION AND FEATURES
Refer to Fig. 1
1: AC Power Cord Socket
Plug in the supplied AC power cord to this socket.
2: Voltage Selector.
Make sure this is set to your local voltage.
3: Power Switch
When switched on “Auto on/off” is activated.
4: Power Indicator Led
If the led is red, it is in standby mode. If the led is green, the unit is on.
5: High Level Input
This input is for connecting to the amplifier`s main speaker outputs.
6: Filtered High Level Output
This is for connecting satellite speakers, such as the Aaron SS-120. The output from this
connection has a filter which stops frequencies below approximately 80Hz going to the
speaker. Because satellites generally have smaller woofers, this connection is preferable to
use, as it will lower distortion plus make the frequency response smoother in the low
frequency region.
7: Low Level Input
Use for low level connection. Refer to previous page.
8: Volume Control
You are able to adjust the output level by rotating this control. Clockwise increases the level.
If the subwoofer makes a slight distortion noise, this lets you know that you are at it`s
maximum output level.
9: Phase Switch
This switch changes the polarity of the subwoofer and is best operated by experimentation as
the subject is beyond the scope of this manual. Try this switch both ways once you have
decided on a location for the unit. Then judge which way produces the best bass. Don`t be
Fig. 1
2
9
5
13
1
10
7
4 3
12
8
11
6
OPERATION
1. Connect all leads making sure that all are in their correct position.
2. Make sure that no music is coming from your stereo.
3. Set the Volume control (8) to the 9 o'clock position.
4. Set the Frequency control (12) to the 12 o'clock position.
5. Switch the power switch (3) on.
6. Play some music from your stereo amplifier and turn the volume up slowly.
7. If everything seems fine, proceed to adjust your subwoofer so the sound is most pleasing to
your ears.
8. Should you encounter any problems seek advice from the dealer who supplied you the
appliance.
SPECIFICATIONS
Model SW-400
20Hz - 100Hz Adjustable
300 watts
0.05%
- High 200 ohms - Low 45K ohms
- High 1V - Low 50mV
Bass Reflex
1 x 310 mm
460mmH x 415mmW x 445mmD
27 Kgs
NOTE: This model has passed the C-Tick compliance
requirements, our supplier code is N1136.
Periodically wipe the cabinets with a damp cloth using a mild detergent or you may use a polish
such as Mr Sheen. Vacuum the grill cloth and cooling fins with the brush attachment of the vacuum
cleaner from time to time. Remove the grill and lightly dust the speaker diaphragms with a clean
paint brush. Every 2 years rotate the Woofers one screw hole.
CARING FOR YOUR SUBWOOFER
concerned if the difference is very small, that is quite often the case.
10: Crossover By-Pass Switch
This switch eliminates all filter circuitry from 20Hz up. This switch can be activated where the
amplifier used, has it`s own built-in channel filter circuitry.
11:Hi Fi / Av Boost Switch
When this switch is set to the Hi Fi setting the low frequencies are linear to 20Hz. This is
achieved by a special electronic equalisation circuit which boosts the low frequencies to
compensate for the natural "roll off" of the woofers low frequency response. If you wish the
sound to be able to go louder and be more punchy, then you should set the switch to Av.
Warning: Don't switch the Subwoofer to Hi Fi while its volume is set high or if the
home theatre system volume is turned up.
12:Frequency Crossover Control
By turning the knob clockwise, the crossover frequency is increased, so by doing this you are
allowing the subwoofer to reproduce more of the upper bass. If, for instance, you have main
speakers that already have reasonable bass, then you adjust the control in an anti-clockwise
direction. On the other hand, if you are using satellite speakers, then the control should be
set around mid position. The best way to use this control is setting it to your own personal
taste.
13:Cooling Fins (Heat Sink)
At no time should anything be placed too close to these fins. Their function is to cool the
amplifier and if cooling is restricted, damage may occur to the amplifier and this is not
covered by warranty. Don`t be alarmed if they are hot to touch during operation as this is
quite normal.
CONTROL FUNCTION AND FEATURES Continued...
Specifications:
Frequency Range
Output Power
Distortion
Input Impedance
Input Sensitivity
Bass Alignment
Woofers
Dimensions
Weight
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