User's Manual
•If the hum persists, disconnect all the source components one at a time from the back of the preamp, until you identify the problem.
•Try moving the speaker cables away from any power cords. Try just one speaker, connecting it to different channels and see if an amplifier channel is bad.
•Check there are no broken connections inside the interconnect cables.
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 another AC socket on a separate line.
•If the hum is heard from within the ampli- fier and not through the speakers, this may also be caused by interference on the AC line. Internal hum can be made worse by a shelf or cabinet resonating, so try moving the amplifier to another location.
•Try moving your preamplifier further away from your amplifier.
•Never place your preamplifier on top of the amplifier.
•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 are still having a problem, remem- ber that Sunfire’s dealers and technical support staff will assist you. Make a list of the things you have tried.
•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 subwoof- ers, or let your main speakers play the full range. Make sure that the preamplifier has been correctly set.
•Check that the speaker wires have been connected correctly: Make sure that the positive of each speaker connects to a positive output of the amplifier, and the negative 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 amplifier using the XLR inputs, make sure that the XLR cables are wired correctly. If one has the hot and cold reversed, then this will also cause a speaker to be out of phase.
No high frequency output•If you are biamping or biwiring, make sure that the current source fuses have not blown.
•Plug the amplifier into a separate switched power strip or outlet from your other components. This will allow you to do the following to reduce any
•Turn on your preamplifier and components before turning on the amplifier.
•At the end of your listening session, turn off the amplifier first.