Sunfire True Subwoofer Signature Owners manual
Safety Instructions
1. Read Instructions -– All the safety and
operation instructions should be read
before the Sunfire Component is
operated.
2. Retain Instructions — The safety and
operating instructions should be kept for
future reference.
3. Heed Warnings — All warnings on the
Component and in these operating
instructions should be followed.
4. Follow Instructions — All operating and
other instructions should be followed.
5. Water and Moisture — The Component
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. Ventilation — The Component should be
situated so that its location or position
does not interfere with its proper ventilation. For example, the Component should
not be situated on a bed, sofa, rug, or
similar surface that may block any
ventilation openings; or placed in a built-in
installation such as a bookcase or cabinet
that may impede the flow of air through
ventilation openings.
7. Heat — The Component should be
situated away from heat sources such as
radiators, or other devices which produce
heat.
8. Power Sources — The Component
should be connected to a power supply
only of the type described in these
operation instructions or as marked on the
Component.
9. Power Cord Protection — Power-supply
cords should be routed so that they are
not likely to be walked upon or pinched by
items placed upon or against them,
paying particular attention to cords at
plugs, convenience receptacles, and the
point where they exit the Component.
10. Cleaning — The Component should be
cleaned only as recommended in this
manual.
11. Non-use Periods—The power cord of
the Component should be unplugged from
the outlet when unused for a long period
of time.
12. 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 Component.
13. Damage Requiring Service — The
Component should be serviced only by
qualified service personnel when:
A. The power-supply cord or the plug has
been damaged; or
B. Objects have fallen, or liquid has spilled
into the Component; or
C. The Component has been exposed to
rain; or
D. The Component does not appear to
operate normally or exhibits a marked
change in performance; or
E. The Component has been dropped, or its
cabinet damaged.
14. Servicing — The user should not
attempt to service the Component beyond
those means described in this operating
manual. All other servicing should be
referred to qualified service personnel.
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User's Manual
15. To prevent electric shock, do not use
this polarized plug with an extension cord,
receptacle or other outlet unless the
blades can be fully inserted to prevent
blade exposure.
Pour préevenir les chocs électriques ne
pas utiliser cette fiche polariseé avec un
prolongateur, un prise de courant ou une
autre sortie de courant, sauf si les lames
peuvent être insérées à fond sans laisser
aucune pariie à découvert.
16. Grounding or Polarization —
Precautions should be taken so that the
grounding or polarization means of the
Component is not defeated.
WARNING:THIS SUBWOOFER IS CAPABLE OF PRODUCING
SOUND PRESSURE LEVELS IN EXCESS OF 116 dB. YOU
MUST TAKE EVERY PRECAUTION TO PROTECT YOUR
HEARING FROM PERMANENT DAMAGE.
Contents
Safety Instructions ....................................... 2
Introduction .................................................. 4
Features....................................................... 4
Unpacking .................................................... 4
Care ............................................................. 4
Overview ...................................................... 5
Control panel features ................................. 6
Installation .................................................... 8
Connections ................................................. 9
Location ..................................................... 10
System configurations ............................... 11
Adjusting the controls ................................ 15
Specifications............................................. 16
Troubleshooting guide ............................... 17
Limited warranty ........................................ 19
Service assistance ..................................... 19
This apparatus does not exceed the Class
A/Class B (whichever is applicable) limits
for radio noise emissions from digital
apparatus as set out in the radio
interference regulations of the Canadian
Department of Communications.
ATTENTION — Le présent appareil
numérique n'émet pas de bruits
radioélectriques dépassant las limites
applicables aux appareils numériques de
class A/de class B (selon le cas)
prescrites dans le règlement sur le
brouillage radioélectrique édicté par les
ministere des communications du
Canada.
To find out more about this and other Sunfire products,
please visit our website: www.sunfire.com
User's Manual
3
Introduction
Features
Dear Friend:
Thank you for purchasing my Sunfire
True Subwoofer Signature. I hope you
enjoy it and the music it makes as much
as I have enjoyed creating it for you.
The big breakthrough features of the
subwoofer are its uncanny tracking
downconverter and its long throw, high
back-electromotive force driver. Taken
together, they provide this subwoofer
with as much bass as you could get from
several 15 inch drivers mounted in a
cabinet the size of a small refrigerator.
Unpacking
Your Sunfire Subwoofer should reach
you in perfect condition. If you do notice
any shipping damage, please contact
your Sunfire Dealer immediately.
Gently lift out the unit and remove all
the packing material. It is important to
save all the packing materials and the
box in case your subwoofer ever needs
to be moved or shipped for repair.
Make sure that you keep your sales
receipt. It is the only way to establish the
duration of your Limited Warranty and it
may come in useful for insurance
purposes.
Please take a moment to fill out and
mail the Sunfire Warranty Registration
card. Also read the serial number located
on the control panel and record it here:
Serial Number:
Purchased from:
• 2,700 watt, high efficiency amplifier
• Very low distortion
• Long throw, premium quality drivers
• Mind-blowing output from a 13 inch
cube!
• Automatic signal-sensing turn-on and
standby mode
• Line level inputs
• Speaker-level binding post inputs
• Line level high-pass outputs
• Continuously variable phase control
• Continuously variable crossover 30
Hz to 100 Hz crossover control
• Continuously variable volume level
control
• Soft clipping circuit allows graceful
overload and prevents speaker
damage due to clipping
• Gold-plated inputs and outputs
Care
To maintain the speaker cabinet’s
finish, first unplug the power cord and
then use a soft, slightly dampened cloth
to clean the surfaces and finish off with a
dry cloth.
To keep the large rubber surrounds
soft and supple for 20 years or more,
treat them with MINK OIL, available at
most shoe repair stores. Rub a generous
amount into the surrounds with a soft
cloth about once a year (more often if
you live in a dry climate).
If your Sunfire Subwoofer needs
servicing, please read the Troubleshooting section on page 17. If a problem still
persists, contact your nearest authorized
Sunfire Dealer.
Date:
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User's Manual
Overview
Your Sunfire Subwoofer is designed to
give you the best possible low-frequency
sound quality for your home theater
experience. It incorporates a tremendously powerful built-in amplifier and a
pair of drivers to produce tight, floorrumbling bass down to 16 Hz, that you
can feel as well as hear.
The subwoofer has an adjustable high
cut filter and a choice of speaker-level or
line-level inputs for easy incorporation
into existing systems, or as part of a
subwoofer/satellite speaker combination.
The Woofer
To have lots of bass requires moving
lots of air. Your Sunfire Subwoofer
incorporates two drivers that can move
back and forth approximately five times
more than a normal subwoofer. This
gives it a lot of air moving capacity
which allows for majestic bass performance.
Two drivers share the acoustic output.
Sometimes one driver appears to be
moving more than the other. They both
move the same amount only when
operating at the limit of their excursion
and power output, or when bass
requirements and music requirements
demand maximum output from the
system. Otherwise, the power is shared
between the two drivers in a way that
depends on the momentary amplitude
and the momentary musical spectrum. It
is normal for one or the other to move
more or less than its mate during
operation.
On the driver to the left of the control
panel there is a slight bump, under
which is a pressure cap. The bump is
normal. The driver on the right is
absolutely flat and very rugged. The one
with the slight bump is not quite as
rugged, and modest care should be
taken with it, though it is still very strong.
During installation, you should position
the driver with the bump towards a
protected side.
The Amplifier
The large movement range of the
drivers creates greater air pressure
inside the box than a conventional
woofer. Therefore, the drive amplifier
must be much more powerful than an
ordinary woofer amplifier. In fact, it has
to be so powerful that it is almost hard to
believe.
The power amplifier within your Sunfire
Subwoofer is capable of delivering over
2,700 watts into a 3.3 ohm resistor (the
voice coil resistance of the subwoofer’s
driver). When the same full output is
applied to the driver, however, the
enormous back-electromotive force
generated as a consequence of its large
motion and giant magnet causes the
current flow to be much less than if it
were a 3.3 ohm resistor. It is this singular
property of the driver that allows the
woofer to be approximately ten times
more efficient than a woofer this size
would normally be. Hence, the actual
average input power is substantially less
than 2,700 watts, and is approximately
380 watts for most musical material on
the loudest passages.
A compressor circuit kicks in automatically if the input signal level reaches a
level that would overload the driver. This
maintains a ceiling on the output without
clipping.
If the input signal is driven even
further, a ‘soft clipping’ circuit is enabled.
This allows the woofer to put more sound
into the room to satiate the power hungry
user, but without distortion or damage to
the woofer. Thus, for explosive scenes in
movies, this produces extremely high
sound pressure levels (SPL) in your
room without the woofer banging against
its mechanical stops.
If you would like more detailed
information regarding the subwoofer
design, please call us and we will send
you a copy of our subwoofer technical
white paper, or you can view it on our
website: www.sunfire.com.
User's Manual
5
Control Panel Features
FUSE
1. Power/Auto on Indicator
This light is bright when the subwoofer
is on, and dim when the subwoofer is
in its standby mode. This is controlled
by the AUTO ON/OFF circuit. The
presence of an audio signal turns the
unit on. After approximately fifteen
minutes of signal absence, the
subwoofer will go to its standby mode.
The light will only go off when the unit
is unplugged from the wall.
2. Volume Control
This control lets you match the output
level of the subwoofer to the level of
your satellite/main speakers. The
subwoofer output will increase as the
volume control is rotated clockwise.
When you have just installed your
system, turn this down first before
turning on your subwoofer. This will
prevent any loud surprises.
3. Crossover Frequency
This controls the high frequency cutoff
point. With the control rotated fully
clockwise, the subwoofer will reproduce frequencies up to 100 Hz. With
the control fully counter-clockwise the
subwoofer reproduces up to 30 Hz.
4. Phase Control
5. Flat/Video Contour Switch
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Rotate the control until the bass
sounds natural. If the mid-bass sounds
natural but you want more low bass,
turn the crossover frequency down a
little, then turn the volume control up
by about the same amount. This
increases the low-bass output while
leaving the mid-bass output the same.
This control changes the relative phase
of the subwoofer with respect to your
other speakers. Use this control to help
blend the subwoofer with the rest of
your system. This is accomplished by
adjusting the control in small incre-
ments as you listen for the most bass
at your listening position. As a final
trim, readjust the crossover and
volume controls after the phase control
has been set.
When this switch is set to FLAT, the
frequency response extends down to
16 Hz. This is the recommended
setting for most audio and video
applications.
When set to Video Contour, a low
frequency roll-off is introduced
commencing below approximately
30 Hz. This setting may be used if your
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User's Manual
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