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.
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.
Introduction Features Dear Friend: Thank you for purchasing my Sunfire True Subwoofer MK IV. 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.
Overview The Amplifier 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 18 Hz, that you can feel as well as hear. The large movement range of the drivers creates greater air pressure inside the box than a conventional woofer.
Control Panel Features 1 2 3 4 5 SE FU 10 9 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.
system or neighbors are disturbed by ultra low bass. 6. High Level Inputs Under normal conditions, the preferred connection is through the Line Level inputs. If this is difficult or not possible in your system, then you can use the High Level inputs. Also, if you experience excessive noise or hum with the Line Level inputs, often a simple change to the High Level inputs will result in a lower background noise level.
Installation Observe the following general precautions and read the safety instructions on pages 2 and 3 before using your Sunfire Subwoofer. • Never open the cabinet or remove the metal control panel as this might result in an electrical shock to you or damage to the unit. • Protect it from prolonged exposure to direct sunlight and other direct sources of heat, such as heating vents and radiators. • To prevent fire or shock, do not expose the unit to rain or moisture.
Connections Please consider the following when setting up your new system : • Before making or changing any connections, ALWAYS make sure that the subwoofer is unplugged from the wall and your other components are turned OFF. Also turn down the volume control of the subwoofer and your preamplifier or receiver. • Whenever possible, keep the power cords away from the signal cables or speaker wires to prevent any hum or interference being heard in the speakers.
Location Your Sunfire Subwoofer is designed to be placed in a corner and this will produce optimum performance. Experiment with at least two corners and then decide which is the best. #1 is very good positioning. #2 is also excellent but may shake the back wall too much and cause things on or along the wall to rattle too much. If this occurs, use the #3 position: #3 Move the woofer approximately three feet away from the right wall and place it along the back wall as shown.
System Configurations The following pages show some typical connections that you might make in your installation. They show how the inputs and outputs of the Sunfire Subwoofer are connected to your preamplifier or receiver. Connections to a preamplifier’s subwoofer output If your preamplifier has a subwoofer output (often labeled LFE for Low Frequency Effects), it can be connected to the subwoofer’s Left (Mono) input as shown. This is the simplest and recommended connection.
Connections to a preamplifier using Y cables If your preamplifier does not have a sub/LFE output, you can use “Y” cables to send its main outputs to both the subwoofer and your amplifier. The subwoofer will play the low frequency range and your front speakers will play the full range. Although bass is commonly distributed evenly between left and right channels (L+R bass), movie soundtracks often contain differential (L-R) bass. The opening scene in “Top Gun”, for example, has loads of L-R bass information.
Using the line level high-pass outputs If you are using a preamplifier which does not have a sub/LFE output, you can send its left and right front output into the subwoofer’s Line Level inputs and then connect the subwoofer’s High-Pass outputs to the inputs of your amplifier. The subwoofer will play the low frequencies and your amplifier and front speakers will play the frequency range above the subwoofer’s fixed highpass crossover point.
Using the speaker level inputs If you are using a receiver which does not have a subwoofer output or line level outputs (pre-outs), you can connect its speaker outputs to the subwoofer’s Speaker-Level inputs. The front speakers can still be connected to your receiver. The subwoofer’s internal amplifier supplies the power to reproduce the low frequency range. It receives a sample of the signal going to your front speakers. (An insignificant fraction of your receiver’s power is transferred to the subwoofer).
Adjusting the controls There are two main methods for adjusting the level, crossover frequency and phase of the Sunfire Subwoofer to match a system: • Bob Carver’s preferred method: By listening and making the adjustments to suit your taste. • Laboratory method: By measuring the output and adjusting for a flat frequency response. Excellent results can be obtained if you make the adjustments based on simply listening.
Specifications Amplifier Output 2,700 watts rms (3.3 Ω impedance) High Cut Filter 35 Hz - 100 Hz Adjustable. Frequency Response 18 Hz - 100 Hz Power Line Voltage US model 120 VAC 50/60 Hz International model 230 VAC 50/60 Hz Dimensions 11" x 11" x 11" Weight 48 lbs Finish Black anodize and black lacquer. Line power consumption: 600 W average, 18 Hz to 80 Hz, at absolute maximum continuous output. 8 watts at idle. 2700 W peak, time limited basis.
Troubleshooting The Sunfire Subwoofer is expertly designed and built to provide years of trouble-free performance. Most problems that occur can usually be solved by checking your setup or making sure that the components connected to the amplifier are on and fully operational. The following information will help you deal with common problems you may experience during normal use. If a problem still persists, please contact your Sunfire Dealer for assistance.
hum is caused by the cable TV line, then you will need a “ground-loop isolator.” This is an inexpensive device fitted in line with the coaxial cable feed. Hum Adding any component such as a subwoofer to an existing system will often give rise to a hum which wasn’t there before. Your first thought may be that the subwoofer has a problem, but this is more than likely caused by a “ground-loop” in your system.
Limited Warranty Sunfire Corporation is proud of its products which have been built with care using advanced technology and premium component parts. Your unit has been crafted to perform properly for many years. Sunfire Corporation offers the following Warranty to you, the owner of a new Sunfire product: The Sunfire Corporation Warranty for the Subwoofer MK IV is in effect for TWO years from the date of original retail purchase. The Sunfire Corporation Warranty covers defects in materials and workmanship.
Manual part number 913-016-00 Rev D
