Sunfire True Subwoofer Super Junior Users Manual 913 017 00 RevB.p65
Sunfire True Subwoofer Super Junior Owner’s Manual True Subwoofer Super Junior Manual Troubleshoot Sunfire True Subwoofer Super Junior |
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2015-02-02
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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. 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: 6. Ventilation — The Component should be situated so that its location or position A. The power-supply cord or the plug has does not interfere with its proper ventilabeen damaged; or tion. For example, the Component should not be situated on a bed, sofa, rug, or B. Objects have fallen, or liquid has spilled similar surface that may block any into the Component; or ventilation openings; or placed in a built-in installation such as a bookcase or cabinet C. The Component has been exposed to that may impede the flow of air through rain; or ventilation openings. D. The Component does not appear to 7. Heat — The Component should be operate normally or exhibits a marked situated away from heat sources such as change in performance; or radiators, or other devices which produce E. The Component has been dropped, or its heat. cabinet damaged. 8. Power Sources — The Component 14. Servicing — The user should not should be connected to a power supply attempt to service the Component beyond only of the type described in these those means described in this operating operation instructions or as marked on the manual. All other servicing should be Component. referred to qualified service personnel. 2 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. 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 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 User's Manual 3 Introduction 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. Features • 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. 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: 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. Purchased from: Date: 4 User's Manual 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 22 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. 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 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 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. 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. User's Manual 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. 5 Control Panel Features 1 2 3 4 5 6 SE FU 7 8 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. 6 9 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. User's Manual To use the high-pass outputs, connect the preamp outs on your preamp/ receiver to the subwoofer’s line level inputs using good quality RCA type patch cords. Then connect a second patch cord from the subwoofer’s outputs to the inputs of your main amplifier. This will allow your main speakers to operate at frequencies above 70 Hz and the subwoofer to operate at frequencies below 70 Hz (see page 13). 5. Line Level Inputs Connect with RCA type patch cords to the line level outputs of your receiver or preamp. If your preamplifier or receiver has a single sub/LFE output, connect it to the subwoofer’s left input jack (see page 11). There is no need to use the subwoofer’s right input jack. If you want to run your main/satellite speakers full range, use a “Y” adapter at the preamplifier outputs (see page 12). In this way, you can send the preamplifier’s output signal to your main amplifier and to the subwoofer at the same time. 6. Speaker 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 Speaker Level inputs. Also, if you experience excessive noise or hum with the Line Level inputs, often a simple change to the Speaker Level inputs will result in a lower background noise level. Connect the Speaker Level inputs to the speaker-level outputs of your amplifier or receiver using speaker wire. The binding posts can accept bare wire, banana, dual-banana or spade connections. User's Manual Your amplifier or receiver MUST have common grounded outputs, or it will be damaged if connected to the subwoofer’s Speaker Level inputs. 7. Line Fuse The subwoofer is supplied with a conservative 4 amp slow-blow type fuse to protect the electronics. Always unplug the power cord before inspecting or changing the fuse. Never use a fuse with a larger current rating than 4 amps. 8. IEC Linecord socket The Sunfire Subwoofer comes with a detachable linecord which connects here. Connect the linecord to the subwoofer before connecting the other end to an 120 Volt, 60 Hz AC outlet. The outlet must have a circuit rating of 8 amps or more (a typical home circuit is rated at 15 amps). If you live in or move to a country where the power grid is 220-240 Volts, the subwoofer must be plugged into a step-down transformer that is rated at 500 watts or more. Never plug the subwoofer directly into 220-240 Volts AC as this will cause catastrophic circuit failure. 9. 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 completely off when the unit is unplugged from the wall. 7 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. If fluid or a foreign object should enter the unit, immediately turn off the power and contact your Sunfire Dealer. • Avoid excessive exposure to extreme cold or dust. • Do not place heavy objects on top of the unit. • Do not place the subwoofer with its control panel against the floor. • If you wish to place your woofer so the drivers face the floor and ceiling, thereby moving up and down, use at least 1-1/2 inch high spikes or feet for support. They may be attached either with screws or self-stick backing. This arrangement will impart substantial house and floor shaking motion. • 8 Four extra heavy, shock absorbing rubber mounting feet have been included. If your woofer tends to wander about slightly while in use, place these feet just inside the existing feet positions. These shock absorbing mounts will let the woofer rock freely, thereby absorbing low frequency rocking energy, allowing it to adhere solidly to the floor. To move the woofer along the floor, rotate it onto one edge and it will slide along easier. Heat rise • Allow adequate ventilation around the metal control panel of the subwoofer. • Do not let anything come into contact with the panel and keep at least two inches away from any walls. The metal control plate serves as the amplifier heat sink and also as a conduit to remove internal heat to the outside and into the atmosphere. It can reach temperatures of 60 degrees C, which will feel hot to the touch, using nerves of flesh and blood as temperature sensors. As uncomfortable as it may feel, 60 degrees C cannot burn you, and in fact is almost cool to copper, silicon, steel, and aluminum, the materials from which your woofer is constructed. AC Power Considerations Ensure that the unit is plugged into an outlet capable of supplying the correct voltage specified for your model. Unplug your subwoofer’s power cord from the electrical outlet if it will be left unused for a long period of time. NOTE: Never remove the ground pin from any power cords. This is very dangerous. Route the power-supply cord so it is not likely to be walked on or pinched by items placed upon or against it, especially at plugs, convenience receptacles, and the point where it exits from the unit. Magnetic Fields We recommend that you place your woofer further than two feet away from your TV, VCR, tape deck or computer, so the speaker’s magnet won’t distort the colors of your TV picture or erase your video tapes, audio tapes or computer discs. User's Manual 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. • Choose reliable, high quality interconnect cables, also called patch cords or RCA cables. They should be fully shielded and as short as possible for the job. The longest cable in your system will likely be to the subwoofer, so choose a good quality brand. • Some patch cords can be a very tight fit and there is usually a preferred method of getting them off. Some have to be removed with a twisting action. Be gentle or you may damage the jacks of the subwoofer or your other components. Tape Deck DVD Preamplifier Power strip Speaker Level connections Amplifier • The subwoofer’s Speaker Level inputs can accept speaker wires with banana, dual-banana, bare wire or spade terminals. If you have banana type connectors on your speaker wire, make sure that you tighten the binding posts before inserting. • Make sure that the negative speaker wires never touch the positive wires as this will short out and possibly damage your amplifier or receiver. AC outlets on the same circuit breaker Subwoofer • This diagram shows all the low power components sharing a power strip which is connected to the same outlet used by the amplifier. • The subwoofer is connected to an outlet on the same circuit breaker, provided that the total system current draw does not exceed the breaker current rating. • This arrangement will reduce the possibility of an audible hum in your system caused by a ground loop. User's Manual The subwoofer’s two negative posts are joined internally (common-grounded). Your amplifier must also be internally common-grounded or you cannot use this connection. Contact the manufacturer of your amplifier to make sure its outputs are common grounded. 9 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. This will substantially reduce the rattling of the back wall and will still pressurize the room with lots of bass. Using Two Subwoofers If you wish to use two woofers, the sound output will double (an increase of 6 dB). Locate the woofers with one in each corner and experiment with the location and phase control to achieve the best bass response. Always drive each woofer through the Left/Mon input even though you are driving one woofer with a right channel drive and the other with a left channel drive. If your preamplifier has a single sub/LFE output, use a Y cable to split it into two outputs. Although low frequencies are nondirectional, factors such as room reflections, standing waves, resonance and absorption strongly affect your subwoofer’s performance. Moving the subwoofer from one corner to another can have a major effect on the bass response. Remember to keep it at least two or three feet away from any TV screen, computer, VCR or magnetic tapes and discs. This will reduce the chance of the magnetic fields upsetting the TV screen or erasing your magnetic media. Also position the control panel so that it is not touching anything and can receive good ventilation. 10 User's Manual 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. A receiver with a sub/LFE output can be connected in the same way. The subwoofer will play the low frequency range and the other speakers will play the frequency range delivered to them by your amplifier. If you have a home theater preamplifier, it may have an independent subwoofer volume control. Make sure this is correctly adjusted, and that the Sunfire Subwoofer’s crossover frequency is set to 100 Hz. This is by no means an iron-clad rule, rather it is a good starting point. (See the crossover frequency control details on page 6 and adjustments on page 15). PREAMPLIF IER R MAIN OUTPUTS T L R INPUTS AMPLIFIE R You can set the subwoofer’s Bass Level control to 0dB, and then use the preamplifier’s subwoofer level control for normal and routine adjustments. User's Manual L SUB/LFE OU TO FRONT SPEAKERS 11 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. If this is not preserved, the bass in these scenes sounds anemic. The Sunfire Subwoofer utilizes differential gain on the left and right inputs to retain both the L+R and L-R information. Therefore, systems which do not have a dedicated sub/LFE output should use both the left and the right inputs as shown, for the greatest bass impact. PREAMPLIF IER L R MAIN OUTPUTS SUB/LFE OU T L R INPUTS AMPLIFIE R TO FRONT SPEAKERS An alternative connection method without using Y cables is shown on the next page. If your preamp/receiver has a dedicated sub/LFE output, then only the Left (Mono) input is used, as shown on the previous page. 12 User's Manual 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. PREAMPLIF IER The signals coming out of the subwoofer’s highpass outputs are not affected by any of the controls. They are just a copy of the signals going in except that the low bass is filtered out. This uses the subwoofer’s passive crossover network, rather than the active network and controls. L R MAIN OUTPUTS L R INPUTS AMPLIFIE R TO FRONT User's Manual SPEAKERS 13 Using the speaker level inputs If you are using a receiver which does not have a subwoofer output or line level outputs (preouts), 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). RECEIVER MAIN OUTPUTS L There is no need to use the Speaker Level inputs if you are using a separate amplifier and preamplifier. Such systems are best connected using the Line Level inputs as shown in the previous diagrams. TO FRONT R SPEAKERS If you are using the Line Level inputs and there is a excessive amount of noise or hum present, using the Speaker Level inputs may yield a lower background noise level. Your receiver MUST have common grounded outputs, or it will be damaged if connected to the subwoofer’s Speaker Level inputs. 14 User's Manual 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. This is Sunfire’s preferred method as it allows the system to be voiced based on what sounds the best, whereas laboratory-flat frequency response can often be clinical and less than exciting. The following procedure is for those who prefer a more methodical and scientific approach. This excerpt is from “The Audio Critic,” issue 24, page 31, written by contributing editor David Rich, and is reprinted here with their kind permission. Step 3. With both the subwoofer and the main speaker connected, measure the level of the tones at the available frequencies. Because the crossover is set too high, you will have a peaked response. Adjust the crossover control to get the smoothest response. Step 4. Use the phase control to make the response even smoother. It has its biggest effect at the crossover frequency. You can iterate between the crossover and the phase controls. Keep your hands off the level control! It was set correctly in step 2. Step 5. Listen to the subwoofer. Resist all temptations to turn up the level control. Play something with really deep bass to confirm that your subwoofer is working.” Control settings Use this drawing to record some of your favorite settings. You will need a test CD with lowfrequency warble tones, and a sound pressure-level meter. The Radio Shack® SPL meter will do fine, as will the Stereophile® test CD. “Step 1. Disconnect the subwoofer and run the main speaker with a tone in its passband (80-100Hz). Measure the level. Step 2. Disconnect the main speaker and reconnect the subwoofer. Set the subwoofer to its highest crossover frequency. Set the level control of the subwoofer to give the same sound pressure level with the same tone you used in Step 1. User's Manual 15 Specifications Amplifier Output 1,500 Watts rms (4.6 Ω impedance) High Cut Filter 35 Hz - 100 Hz adjustable. The crossover can be bypassed by rotating the crossover frequency control fully clockwise. Frequency Response 22 Hz - 100 Hz Power Line Voltage AC 120 V/60 Hz Dimensions 9" x 9" x 9" Weight 29 lbs Finish Black anodize and black lacquer. Line power consumption: 300 W average, 22 Hz to 100 Hz, at absolute maximum continuous output. 1200 W peak, time limited basis Output levels: Input sensitivity for full output: 240mVrms from left input with volume control at 0dB, 90mVrms with volume control fully clockwise * 0.48Vrms from right input with volume control at 0dB, 180mVrms with volume control fully clockwise * Input impedance: 30KΩ for Line-Level inputs 5.6KΩ for Hi-Level inputs Driver: Extra large magnet and long throw mechanical design yield very high backemf. The result is extraordinarily high operating efficiency – that is, more acoustic output for each watt of input. Internal system gain: 42dB from left input jack to speaker with the Bass Level control at 0dB, 54dB with the control fully clockwise * 36dB from right input jack to speaker with the Bass Level control at 0dB, 48dB with the control fully clockwise * Sunfire Subwoofer utilizes * The differential gain on the left and right inputs to retain both L+R and L-R information. Greater than 108 dB peak SPL (includes room gain) from 25 Hz to 90 Hz A typical Sunfire subwoofer can be expected to ‘best’ its specified minimum peak SPL by several decibels. © 2001 Sunfire Corporation. All rights reserved. Sunfire Corporation reserves the right to improve its products at any time. Therefore, specifications are subject to change without notice. Manual part number 913-017-00 Rev B 16 User's Manual 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. Not enough bass • Check that the input connections are going to the input terminals and not the output terminals. In other words, the connections from your preamplifier must go to the subwoofer’s line level inputs instead of the line level high pass outputs. If they are connected to the outputs by mistake, the bass will be weak but the subwoofer will still function. • If your preamplifier has a single subwoofer/LFE output jack, make sure it connects to the subwoofer’s Left (Mono) input. If the bass is still not enough after checking all the remaining points, use a Y cable to connect the preamplifier’s single subwoofer/LFE output to the subwoofer’s right and left inputs. • • Make certain the woofer is in a corner location, firing at 45 degrees into the walls formed by the corner. This is not absolutely essential, but will maximize the bass output and give the smoothest possible response. If you place the unit so one of the drivers is firing into one of the walls, leave three inches of clearance between the driver and the wall. Home theater preamplifiers usually have a way of adjusting the level of the subwoofer/LFE output, either using a User's Manual remote control or with a small volume knob on the back panel. Make sure that this is adjusted correctly. • If the preamplifier’s subwoofer/LFE output has an adjustable crossover frequency, make sure that the subwoofer’s own crossover point is set higher or part of the bass range will be missing. Not enough bass in a 5.1 system • 5.1 home theater preamplifiers usually have a bass management system which allows the bass to be redirected among your speakers. For example, the bass normally present in the front speakers can be redirected to play in the subwoofer, or the subwoofer can play the bass from all the speakers, in addition to its dedicated LFE (low frequency effects) channel. Make sure that all of the bass management options are correctly set. The preamplifier may have a way of turning the subwoofer output off entirely, so check that it is always on. • Check that the preamplifier calibration procedure is correctly adjusted. Usually, the preamp will send a test tone through all the speakers in your system, allowing you to adjust (trim) the volume of each channel until they are all playing at the same level. • If the bass is weak only when playing 5.1 surround sources, check that your preamplifier is correctly set to decode the 5.1 surround modes, such as Dolby Digital or DTS. • Some DVD discs have a menu which allows you to select which soundtrack to play. Check that the correct 5.1 surround audio soundtrack is selected, otherwise it may just play stereo into your preamp and you won’t get the true LFE signal into the subwoofer. 17 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. Follow these steps to isolate the main cause of the ground-loop hum (there may even be more than one cause). • • Try to have all of your equipment on the same electrical outlet or circuit, see page 9 for more details. • If the hum persists, disconnect all the source components one at a time from the back of the preamplifier until you identify the problem. • If you are using the subwoofer’s Line Level inputs and there is a excessive amount of noise or hum present, using the Speaker Level inputs may yield a lower background noise level. • Ground-loop isolators are available for audio lines and video. Once you have identified which components are causing a problem, you can fit the isolators between the component and the preamplifier. If your subwoofer is a fair distance away from your other equipment, you may use a 15 amp extension cord as long as it has a ground connection. NOTE: Never remove the ground pin from any power cords. This is very dangerous. The subwoofer won’t turn off • The subwoofer should turn itself off after approximately fifteen minutes with no audio signal present. If not, check there is no background hum. The subwoofer may sense hum as a small signal and stay on. See the above hints to eliminate the hum. • Turn off all components in your system, including the subwoofer, amplifiers and the preamplifier, before disconnecting or connecting cables. • First remove every connection from the subwoofer to the rest of your system. Plug the subwoofer power cord back in The subwoofer won’t turn on and check for the hum. If it is still there, • The subwoofer’s volume control may be try plugging it into a different outlet in turned down or no signal is received case it is picking up interference on the from your preamplifier. AC line. • Check the input connections. If you have followed the above • Check the mode switch on surround guidelines for the power connections systems to be certain that a bass signal and a hum is still present, then there is is being sent to the subwoofer. one very common problem to consider: a “ground-loop” introduced by connecting a cable TV line to a VCR or TV, Audible snap from outlet which is then connected to the preamp. • When the subwoofer is initially plugged This can be addressed as follows: into the wall, there is an in-rush current surge as the power supply capacitors Disconnect all cables which come from charge up. This may give rise to an outside the room, such as cable TV, audible snap from the outlet as the plug satellite TV, or roof top antennas. Make is inserted. This can be avoided by sure that they are disconnected where plugging the subwoofer into a switched they first enter the room, so they are outlet or switched power strip (rated at making no connection to your preampli15 Amps or more). fier, TV, or any other component. If the • • 18 User's Manual 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 Super Junior is in effect for TWO years from the date of original retail purchase. The Sunfire Corporation Warranty covers defects in materials and workmanship. The following, however, are excluded: a) Damage caused during shipment. b) Damage caused by accident, misuse, abuse of operation contrary to the instructions specified in the Sunfire Corporation user’s manual c) Units where the serial number has been defaced, modified or removed, d) Damage resulting from modification or attempted repair by any person not authorized in writing by Sunfire Corporation. The Sunfire Corporation Warranty extends to the original owner or subsequent owner(s) during the two year warranty period so long as the original dated purchase receipt is presented whenever warranty service is required. All implied warranties, including warranties or merchantability and fitness for particular purposes, are limited in duration to the two year length of this Warranty, unless otherwise provided by state law. Sunfire Corporation’s liability is limited to the repair or replacement, at our option, of any defective product and shall not in any event include property or any other incidental or consequential User's Manual damages which may result from the failure of this product. Some states do not allow limitations on how long an implied warranty lasts and/or do not allow the exclusion or limitation of incidental or consequential damages, so the above limitations or exclusions may not apply to you. This Warranty gives you specific legal rights, and you may also have other rights which vary from state to state. We suggest that you attach your purchase receipt to this Warranty and keep these in a safe place. Thank you for your choice of a Sunfire Corporation product. Service Assistance We suggest that you read the Limited Warranty completely to fully understand your Warranty/Service coverage. If your Sunfire Corporation product ever requires service, write to us, or call: Sunfire Corporation Technical Services Department P.O. Box 1589 Snohomish, WA 98290 Tel (425) 335-4748 Fax (425) 335-4746 You will be directed to an authorized Sunfire Corporation Service Station or receive instructions to ship the unit to the factory. Please save the original shipping carton and packing materials in case shipping is required. Please do not ship Parcel Post. NOTE: Before sending in your unit for repair, you must call Sunfire for return authorization. Include a complete description of the problem, indicating how you have it connected, the associated equipment in your system and a copy of your purchase receipt. Initial shipping costs are not paid by Sunfire Corporation; return ground shipping costs will be prepaid if repairs were covered by the scope of this Warranty. 19 Manual part number 913-017-00 Rev B
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