Manuals / Sunfire / Home Audio / Stereo Amplifier

Sunfire 200 ~ five Other causes of noise, Poor bass performance, Turn-on and turn-off thumps

Models: 200 ~ five 400 ~ five

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•Check that the interconnect cables to the ampliÞer do not have any broken connections.

•If you are still having a problem, remember that SunÞre’s dealers and technical support staff will as- sist you.

Other causes of noise

•Speaker noise may also be caused by interference or noise on your AC line. Make sure there are no large appliances sharing the line, or halogen lamps or lamps with dimmer controls.

•Try connecting your system to an- other AC socket on a separate line.

•Keep power cords away from au- dio cables.

•Do not place the preampliÞer di- rectly on top of the ampliÞer.

•If the hum is heard from within the ampliÞer and not through the speakers, this may also be caused by interference on the AC or DC lines. The power transformers may turn this interference into an audible noise. Internal hum can be made worse by a shelf or cabinet resonating, so try moving the am- pliÞer to another shelf.

•Try moving your preampliÞer further away from your ampliÞer. Sensitive preamp circuits may pick up hum from the ampliÞer trans- former’s magnetic Þeld.

•Try moving your components further away from the TV, especially if you ever notice the screen has changed color in the area closest to the component.

•If you have very high efÞciency speakers, these may show up noise which other speakers may not.

•If you are still having a problem, remember that SunÞre’s dealers and technical support staff will as-

sist you. Make a list of the things you have tried.

Poor bass performance

•Make sure that your preamp does not have the bass level turned down.

•Many surround preampliÞers have controls which can direct all the bass to subwoofers, or let your main speakers play the full range. Make sure that the preampliÞer has been correctly set. If you are not using a subwoofer, set the speaker options to “Large.”

•Check that the speaker wires have been connected correctly: Make sure that the positive of each speaker connects to a positive out- put of the ampliÞer, and the neg- ative of each speaker connects to a negative output. If one speaker is wired incorrectly, than it will be “out of phase” with the others, resulting in poor bass performance.

•If you have connected the ampliÞer using the XLR inputs, make sure that the XLR cables are wired cor- rectly. If one has the hot and cold reversed, then this will also cause a speaker to be out of phase.

Turn-on and turn-off thumps

•Plug the ampliÞer into an unswitched AC outlet, and use the AUTO-ON feature. This will allow the ampliÞer to turn on and off with good manners.

Current source outputs not working

•If you are biamping or biwiring, make sure that the current source fuses have not blown.

•If these fuses blow often, it is acceptable to replace with a slo-blo 7 ampere fuse.

APPENDIX

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User's Manual

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Sunfire 200 ~ five, 400 ~ five manual Other causes of noise, Poor bass performance, Turn-on and turn-off thumps
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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.