Yamaha Audio YST-SW20 User Manual
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
SUBWOOFER SYSTEM
YST-SW20
Active Servo
Technology
OWNER’S MANUAL
i
CAUTION: TO REDUCE THE RISK OF
ELECTRIC SHOCK DO NOT REMOVE
COVER (OR BACK). NO USER-SERVICEABLE
PARTS INSIDE. REFER SERVICING TO
QUALIFIED SERVICE PERSONNEL.
• Explanation of Graphical Symbols
The lightning flash with the arrowhead symbol
within an equilateral triangle, is intended to alert
you to the presence of uninsulated “dangerous
voltage” within the product’s enclosure that may
be of sufficient magnitude to constitute a risk of
electric shock to persons.
The exclamation point within an equilateral triangle is intended to alert you to the presence of
important operating and maintenance (servicing) instructions in the literature accompanying
the appliance.
WARNING
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK.
DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE.
IMPORTANT!
Please record the serial number of this unit in the space below.
Model:
Serial No.:
The serial number is located on the rear of the unit.
Retain this Owner’s Manual in a safe place for future reference.
SAFETY INSTRUCTIONS
1 Read Instructions – All the safety and operating instructions
should be read before the unit is operated.
2 Retain Instructions – The safety and operating instructions
should be retained for future reference.
3 Heed Warnings – All warnings on the unit and in the operating
instructions should be adhered to.
4 Follow Instructions – All operating and other instructions should
be followed.
5 Water and Moisture – The unit should not be used near water –
for example, near a bathtub, washbowl, kitchen sink, laundry
tub, in a wet basement, or near a swimming pool, etc.
6 Carts and Stands – The unit should be used only
with a cart or stand that is recommended by the
manufacturer.
6A A unit and cart combination should be moved with
care. Quick stops, excessive force, and uneven
surfaces may cause the unit and cart combination to overturn.
7 Wall or Ceiling Mounting – The unit should be mounted to a
wall or ceiling only as recommended by the manufacturer.
Ventilation – The unit should be situated so that its location or
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position does not interfere with its proper ventilation. For
example, the unit should not be situated on a bed, sofa, rug, or
similar surface, that may block the ventilation openings; or
placed in a built-in installation, such as a bookcase or cabinet
that may impede the flow of air through the ventilation openings.
9
Heat – The unit should be situated away from heat sources
such as radiators, stoves, or other appliances that produce heat.
10 Power Sources – The unit should be connected to a power
supply only of the type described in the operating instructions
or as marked on the unit.
11 Power-Cord Protection – Power-supply cords should be routed
so that they are not likely to be walked on or pinched by items
placed upon or against them, paying particular attention to
cords at plugs, convenience receptacles, and the point where
they exit from the unit.
12 Cleaning – The unit should be cleaned only as recommended
by the manufacturer.
13 Nonuse Periods – The power cord of the unit should be
unplugged from the outlet when left unused for a long period of
time.
14 Object and Liquid Entry – Care should be taken so that objects
do not fall into and liquids are not spilled into the inside of the
unit.
15 Damage Requiring Service – The unit should be serviced by
qualified service personnel when:
A. The power-supply cord or the plug has been damaged; or
B. Objects have fallen, or liquid has been spilled into the unit;
or
C. The unit has been exposed to rain; or
D. The unit does not appear to operate normally or exhibits a
marked change in performance; or
E. The unit has been dropped, or the cabinet damaged.
16 Servicing – The user should not attempt to service the unit
beyond those means described in the operating instructions. All
other servicing should be referred to qualified service personnel.
17 Power Lines – An outdoor antenna should be located away
from power lines.
18 Grounding or Polarization – Precautions should be taken so
that the grounding or polarization is not defeated.
2
Controls
4
5
6
IN
OUT
LINE 1
LINE 2
L
R
Front Panel
1POWER Switch and Indicator: Press to power on the
YST-SW20; the power indicator will light up. Press again to power
off. Before powering on and off, turn down the VOLUME control.
2HIGH CUT Switch: This switch selects the high-cut filter
frequency: Set it to either LOW or HIGH.
3VOLUME Control: Use this control to set the volume level. Turn
it clockwise to increase the volume, and counterclockwise to
reduce it.
Auto Power On/Off Function
When powered on, if no input signal is received after 5–10 minutes,
the power is switched off automatically. When an input signal is
received, the power is switched back on automatically. This
function works only when the power switch is in the on position.
Note: The power may switch off automatically when the input signal
level is very low. If this does occur, increase the output level from the
source device and reduce the YST-SW20 VOLUME control accordingly.
Rear Panel
4LINE 1 IN: This 3.5 mm stereo jack connection is for inputting
line-level signals to the YST-SW20.
5LINE 1 OUT: This connection can be used to feed the input signal
6LINE 2: These RCA-pin jacks are for inputting speaker level
to other equipment.
signals to the YST-SW20. They can be connected directly to the
speaker outputs of a stereo amplifier.
Active Servo
Technology
1
2
ACTIVE SERVO PROCESSING
SUBWOOFER SYSTEM YST-SW20
POWER
HIGH CUT
HIGH
LOW
VOLUME
3
3
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