Other causes of noise, Poor bass performance

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

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 preamplifier di- rectly on top of the amplifier.

•If the hum is heard from within the amplifier and not through the speakers, this may also be caused by interference on the AC or DC lines. The power transformer 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- plifier to another shelf.

•Try moving your preamplifier further away from your amplifier.

Sensitive preamp circuits may pick up hum from the amplifier trans- former’s magnetic field.

•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 efficiency speakers, these may show up noise which other speakers may not.

•If you are still having a problem, remember that Sunfire’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 preamplifiers have controls which can direct all the bass to subwoofers, or let your main speakers play the full range.

Make sure that the preamplifier has been correctly set. If you are not using a subwoofer, set the speaker options to “LARGE,” and the subwoofer to "OFF."

•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 amplifier, and the neg- ative of each speaker connects to a negative output. If one speaker is wired incorrectly, then it will be “out of phase” with the others, resulting in poor bass performance.

•If you have connected the amplifier 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 amplifier into an unswitched AC outlet, and use the AUTO-ON feature. This will allow the amplifier to turn on and off silently.

Current source outputs not working

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

APPENDIX

User's Manual

TGA-7201, TGA-7401-230, TGA-7201-230, TGA7401 specifications

The Sunfire TGA series stands as a testament to cutting-edge audio engineering, with models like the TGA7401, TGA-7201-230, TGA-7401-230, and TGA-7201. Each of these amplifiers is meticulously crafted to cater to the needs of audiophiles seeking unparalleled performance and robustness in their sound systems.

The Sunfire TGA7401, for instance, boasts a powerful output of 400 watts per channel into 8 ohms, making it an excellent choice for driving demanding speakers. This model employs Sunfire’s patented Tracking Downconverter technology, which provides high efficiency while minimizing distortion. The low-profile design of the TGA7401 allows it to fit comfortably in AV racks without sacrificing operational power, ensuring that it can deliver high-quality sound in any setup.

Similarly, the TGA-7201-230 is designed for those who appreciate compactness without compromising audio fidelity. With its 200 watts per channel output, this amplifier is ideal for smaller setups or as an addition to a home theater system. The TGA-7201-230 features advanced thermal management systems that keep the amplifier cool during extended use, increasing durability and performance reliability.

The TGA-7401-230 presents a hybrid of power and flexibility, offering both balanced and unbalanced inputs. This feature allows users to integrate the amplifier seamlessly into various audio setups, whether it be for home theater or high-fidelity stereo listening. The inclusion of a sophisticated signal path and upgraded components ensures that the audio performance is always crystal clear, with an impressive dynamic range.

On the other hand, the TGA-7201 rounds out this impressive lineup with its combination of efficiency and streamlined features. It maintains a low total harmonic distortion rate, ensuring that listeners receive accurate sound reproduction, which is essential for both music and cinema experiences. The compact design enables it to be used in various environments, while still delivering the power necessary for an exhilarating audio experience.

Overall, the Sunfire TGA series exemplifies high-performance audio technology, bringing forth amplifiers capable of delivering clear, powerful sound. With their robust build quality, innovative technologies, and impressive specifications, models like the TGA7401, TGA-7201-230, TGA-7401-230, and TGA-7201 provide a premium listening experience for any audio enthusiast. Whether you are building a home theater or simply seeking to upgrade your audio setup, the Sunfire TGA series stands ready to enhance your listening experience.