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Hello, To test the subwoofer when the blue light is on if you apply your thumb to the end of the subwoofer cable (the end that you would plug into the receiver) there should be feedback from the sub. If there is no feedback then the sub is not working correctly. Thanks, FJD
it may not be feedbacl, but ground hum. make sure the turntable is grounded. the turntable should have a ground wire with one end stripped. Bend the stripped, bare wire into a u shape and hook it around the ground screw of your receiver and tighten it down. If your turntable is already grounded, it may be feedback. you may have speakers too close to the TT or your volume is too high
Hello Johnny, As a test to see if the subwoofer is working I would have you run one simple test. Unplug the subwoofer from the receiver and apply your finger to the end of the cable. If the subwoofer is working then you will hear feedback through the receiver as you put your finger on it. If there is no feedback this is usually a good indication that the subwoofer is no longer working. Thanks, FJD
Check your audio settings. Feedback is a condition caused when you are transmitting and your audio is coming out of a speaker (headphone) and is picked up by the microphone. Try turning your audio down; reducing your microphone gain; and perhaps using a wind sock (microphone cover) over your microphone to reduce the amount of feedback audio entering into the microphone (manual pg 13).
Feedback occurs whenever a microphone is being amplified, and it picks up its own signal above a certain level. Unfortunately, there's no way to reduce this possibility using just the Numark C3FX - you can only turn the microphone level down. The only way to reduce feedback through a speaker system is to use a graphic equalizer. Here's a good resource for how to do that: http://rfmedia.hubpages.com/hub/Controlling-Microphone-Feedback-with-a-Graphic-Equalizer
Feedback is a sharp, loud noise that can come through the earphones of a headset unexpectedly---it occurs when the headset is getting sound (feed) from someone else speaking or playing music into a microphone. This sound can create a dangerous situation for someone who is operating expensive equipment or flying a plane at the time since it can disable hearing temporarily. If you experience feedback often, it could also lead to serious hearing problems.
Mic Too Close to the Speaker or Volume Too High The main cause of a feedback sound in a headset is proximity to a speaker. If a person holding a microphone on the other end gets too close to a speaker, it creates a loop of re-amplified sound that results in the loud, screeching noise. When the volume on the other party's microphone is too high, it is more vulnerable to picking up unwanted noise and feedback from speakers and sound output devices in the room. So make sure that you ask the other party to turn down the microphone to a normal level and stay far from speakers. b> Two Microphones Gathering Same Sound b> When the other party places two microphones too close to each other, it could cause feedback. When positioned toward the sound source (such as a person speaking) the microphones will both pick up the same audio and compete with each other when creating the output of sound, causing a sharp noise in your headset. This problem, called acoustic phase interference, is resolved by simply ensuring that the other party uses one microphone at a time. Poor-Quality Headset or Microphone b> One common cause of feedback is simply a poor-quality headset or microphone. Most modern headsets and microphones have noise-canceling features that manage and kill feedback before it has a chance to occur. These noise-canceling headsets are essential for pilots and aviation crew members. If you hear sudden feedback that is strong enough to hurt your ears, the headset or microphone is simply not properly equipped to actively cancel that unwanted noise before it hits your ears. Buy a higher-quality noise-canceling headset to manage the feedback noise when you're going about your tasks. Hope this helps.
If you are not using a microphone, then you are not the feedback source. That being said, a blue-tooth headset still qualifies as a microphone, and is capable of generating feedback.
If using blue-tooth, then switch to a standard wired headset to determine if the feedback diminishes.
Regardless of headset type, be sure to have game chatter through the headset only setting as opposed to through the TV speakers, and keep the TV turned down. There will be an obvious lag between TV speaker and headset microphone which can create a feedback loop.
If other gamers can hear your TV when you are talking, then the TV output is too loud and will create feedback opportunities.
If none of the above applies, then the feedback is generated elsewhere.
Disconnect the coaxial cables from the transmitter and receiver of your equipment. They may be marked "Output" and "Input."Connect the jumper cable from the transmit jack to the receive jack.
This completes your near-end loopback--and, if everything works, the
equipment should communicate with itself.Connect the two cables that you disconnected from the equipment together
with the coaxial splice. The completes the far-end loopback and the
distant equipment should be able to communicate with itself.Restore the cables to their original positions after you complete the test.