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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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.
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.
WARNING:THIS SUBWOOFER IS CAPABLE OF PRODUCING SOUND PRESSURE LEVELS IN EXCESS OF 108 dB. YOU
MUST TAKE EVERY PRECAUTION TO PROTECT YOUR
HEARING FROM PERMANENT DAMAGE.
Contents |
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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 |
To find out more about this and other Sunfire products, please visit our website: www.sunfire.com
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Introduction Features
Dear Friend:
Thank you for purchasing my Sunfire
True Subwoofer Super Junior. 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:
Date:
•High power, high efficiency amplifier
•Very low distortion
•Long throw, premium quality drivers
•Extremely compact size
•Automatic signal-sensing turn-on and standby mode
•Line level unbalanced inputs
•Speaker level binding post inputs
•Line level high-pass outputs
•Continuously variable phase control
•Continuously variable crossover frequency adjustment
•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.
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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 22 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
1,500 watts into a 4.6 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 4.6 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 1,500 watts, and is approximately
120 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.
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Control Panel Features
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1. Bass Level
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 this 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.
2. Crossover Frequency
This controls the high frequency cutoff point. With the control set to the 100Hz mark, the subwoofer will reproduce frequencies up to 100 Hz. If the control is set fully clockwise, the crossover is bypassed and the subwoofer will reproduce a wide frequency range.
With the control fully counter-clockwise the subwoofer reproduces a narrow range, up to 35 Hz.
Rotate the control until the bass sounds natural. If the mid-bass sounds natural but you want more low bass, turn the control down a little, then turn the Bass Level control up by about the same amount. This increases the lowbass output while leaving the mid-bass output the same.
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3. Phase Control
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 increments as you listen for the most bass at your listening position. As a final trim, readjust the Crossover Frequency and Bass Level controls after the phase has been set.
4. Outputs
Line level high-pass output signals are available at these jacks. These outputs are active whenever a signal is hooked up to the inputs of the subwoofer. This crossover is a passive network with a fixed crossover frequency of 70 Hz and a 6 dB per octave slope.
We recommend using this high-pass function with main/satellite speakers that are small and not designed to reproduce low frequencies. If your main speakers are capable of operating full range, then you will not need to use the high-pass function.
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