Troubleshooting Guide

APPENDIX

The SunÞre AmpliÞer is expertly designed and built to provide years of trouble-free performance. Most prob- lems that occur can usually be solved by checking your setup or making sure that the audio and video compo- nents connected to the processor are on and fully operational.

The following information will help you deal with common setup problems you may experience during normal use of your unit. If the problems still persist, please contact your SunÞre Dealer for assistance.

No sound from one or more speakers

•Speaker cables may have come undone. Turn off your system and check the cables, and tighten the ampliÞer and speaker binding posts.

•Broken audio cable.

•The preampliÞer volume level is low for the channels concerned. Recheck the preampliÞer calibra- tion procedure.

•The preampliÞer Mute switch is on, or an external processor loop or a tape monitor loop is engaged.

•Check that your preampliÞer or source is running the correct sur- round sound mode. Maybe it is set for stereo when you were expect- ing 5.1 surround sound.

•Check in case any missing chan- nels have been turned off in a preampliÞer setup menu. For example, the center ampliÞer channel will not receive a signal if the preampliÞer has been set to "Phantom."

•The Auto/on/off switch might be in the off position.

•One of the fuses for the current source outputs may have blown.

The ampliÞer shuts down often or the line fuse blows often

•Check that the positive and nega- tive speaker wires are not shorted together.

•Make sure that no speakers are shorted internally. If you have an ohm-meter, disconnect the speaker wires and measure the resistance between the speaker’s positive and negative terminals. If the read- ing is less than 2 ohms, the speak- ers may have an internal short. Measure all speakers and check their impedance speciÞcations.

•If you have connected speakers in Parallel, the overall impedance may be too low. It is recommended that you rearrange the speakers in Series to increase the overall impedance, thus taking some of the load off the ampliÞer.

•Make sure that the ampliÞer has good ventilation and is not over- heating. Use the crystal base to al- low good airßow underneath. If the ampliÞer is in a closed rack, open up the rear panel or use a quiet fan for improved ventilation.

A Hum is heard in your speakers

This problem is more than likely caused by a “ground loop” in your sys- tem, rather than a fault in the ampliÞer. Follow these steps to isolate the main cause of the hum, there may even be more than one.

•If your preampliÞer has XLR bal- anced outputs, use them because they offer greater immunity to noise Þelds.

•Remember to turn off all compo- nents in your system, including the ampliÞer, before disconnecting or connecting any cables during troubleshooting.

•Try to have all of your equipment on the same electrical outlet or circuit. Group all the low power components (preamp, CD player, DVD etc.) on a single outlet or power strip. This is provided that the overall current draw from your equipment does not exceed the rating of the outlet or breaker.

•Disconnect all cables which come from outside the room, and check if the hum goes away. This in- cludes such connections as cable TV, satellite TV, or roof top an- tennas. Make sure that they are disconnected where they Þrst enter the room, so they are making no connection to the preampliÞer or the TV, or any other component. If the hum is caused by the cable TV line, then you will need a “ground loop isolator.” This is an inexpen- sive device Þtted in line with the coaxial cable feed. Contact your cable company or your SunÞre Dealer for assistance.

•Disconnect all connections from the preampliÞer to your TV, VCR or DVD.

•As a test, disconnect any other component which has a grounded power cord.

NOTE: Never remove the ground pin from any power cords. This is very dangerous.

•If the hum persists, disconnect all the source components one at a time from the back of the preampli- Þer, until you identify the problem.

•Ground loop isolators are available for audio lines and video. You can ask your SunÞre Dealer for assis- tance.

•Try moving the speaker cables away from any power cords. Try just one speaker, connecting it to each ampliÞer channel and see if one channel is bad.

User's Manual

200 ~ five, 400 ~ five specifications

The Sunfire 400 is a high-performance audio amplifier that has garnered attention for its remarkable features, advanced technologies, and exceptional sound quality. As part of Sunfire's renowned lineup, this amplifier is designed to meet the demands of audiophiles and home theater enthusiasts alike.

One of the standout characteristics of the Sunfire 400 is its impressive power output. Delivering 400 watts per channel at 8 ohms, it ensures that even the most demanding speakers are driven to their fullest potential. This translates to a dynamic audio performance that maintains clarity and detail, regardless of the volume level. Additionally, its ability to handle lower impedances makes it versatile for various speaker setups.

The Sunfire 400 incorporates advanced technologies that contribute to its superior performance. One such technology is the patented Tracking Downconverter, which allows the amplifier to achieve higher efficiency levels without compromising audio quality. This innovative design minimizes heat generation and maximizes power output, allowing for a compact form factor without the bulk associated with traditional amplifiers.

Another key feature of the Sunfire 400 is its comprehensive set of connectivity options. The amplifier includes balanced XLR inputs, RCA inputs, and speaker outputs, ensuring compatibility with a wide range of audio sources and setups. This flexibility makes it a viable choice for both two-channel audio systems and multi-channel home theaters.

The build quality of the Sunfire 400 is impressive, featuring a robust chassis that not only enhances durability but also aids in reducing unwanted vibrations. This construction is essential for maintaining audio fidelity, ensuring that the signal integrity is preserved through the entire amplification process.

Furthermore, the amplifier boasts advanced protection circuitry to safeguard both the amplifier and connected speakers from common issues such as overheating and short circuits. This reliability is crucial for those who wish to use the Sunfire 400 in extended listening sessions or during peak performance situations.

In conclusion, the Sunfire 400 stands out as an exemplary amplifier that combines power, efficiency, and sound quality. With its unique technologies, versatile connectivity, and solid construction, it’s designed to meet the needs of both casual listeners and serious audiophiles. Whether used in a home theater or a dedicated music setup, the Sunfire 400 promises a captivating audio experience that is hard to match.