Eldorado Posted March 8, 2010 Report Share Posted March 8, 2010 After attaching two headrest monitors to the unit, I have got a distortion sound in the speakers. Itäs a kind of humming sound following the motor rpm. Where is the problem most likely located? Quote Link to post Share on other sites
stoveken Posted March 8, 2010 Report Share Posted March 8, 2010 where did you get the power and ground for the h/r monitors? jim Quote Link to post Share on other sites
werty7777 Posted March 8, 2010 Report Share Posted March 8, 2010 Easily put you have a bad ground. Odd though that you never experienced it till now. I really find it odd that adding HR monitors would make it appear if it wasn't there already. Assuming you only ran RCA's from the head unit and got power from under the seats I find it hard to figure out. If you ran power from the dash down by the RCA's that feed the amps in the rear then okay, maybe. Give more info and you will find better advise. Quote Link to post Share on other sites
TypeS Posted March 8, 2010 Report Share Posted March 8, 2010 I had the same problem with the humming sound. I did not have HR Monitors put it. They installed noise insulators (about $20) in the RCA's near the amp. Cured the problem. I am not an installed, so I don't know exactly what they put it. I can ask if you like. Quote Link to post Share on other sites
identityexpired Posted March 8, 2010 Report Share Posted March 8, 2010 Please ask. I have the same problem on my right speaker. Thank you. Quote Link to post Share on other sites
Eldorado Posted March 8, 2010 Author Report Share Posted March 8, 2010 Thanks for all response Based on your comments, I will start to make sure the head unit has a proper separate ground. When I connected the headrests to the unit the ground might have been disconnected? The headrests are connected with RCA (audio and video), Y-cables in the console. Power and ground for the monitors is connected at the backside of a power outlet. Quote Link to post Share on other sites
werty7777 Posted March 8, 2010 Report Share Posted March 8, 2010 Your on the right track. Almost has to be the ground. Anytime you have engine noise through your speakers it is always the ground or the RCA's running down the same side as the amp power. Generally speaking since the battery is on the left in most cars, you would run the power down the driver side and the RCA's down the passenger side. If changing the ground doesn't work the last thing I would do is buy higher quality RCA's to run to the HR monitors. Could be that simple. Quote Link to post Share on other sites
Eldorado Posted March 13, 2010 Author Report Share Posted March 13, 2010 Well, I have made sure the ground has a proper connevtion, I have installed HQ RCA cables, the distortion is still there. I also tried to give the monitors an separate ground, no difference. If I disconnect the audio cables at the y-splitter (under the console) the distortion disappear. Is there anything else to do before trying noise insulators? If insulators, where is best place to install them? Quote Link to post Share on other sites
werty7777 Posted March 14, 2010 Report Share Posted March 14, 2010 Why are you using the Y cable? Your Z feeds the video of the HR monitors right? Or do you have a seperate player to feed the HR monitors? Unsure why I didn't ask earlier but why are you splitting the audio in the first place? Quote Link to post Share on other sites
Eldorado Posted March 14, 2010 Author Report Share Posted March 14, 2010 Well the sound and audio nee to be splitted to two monitors. Quote Link to post Share on other sites
werty7777 Posted March 14, 2010 Report Share Posted March 14, 2010 Why would you split the sound to the HR monitors when the sound is coming from the speakers in the car? Quote Link to post Share on other sites
Eldorado Posted March 14, 2010 Author Report Share Posted March 14, 2010 The monitors transmit the sound wireless to the headsets. The advantage is, I don't need to listen to the movie Quote Link to post Share on other sites
werty7777 Posted March 14, 2010 Report Share Posted March 14, 2010 Makes perfect sense. I have no clue how to help you if you have a good ground. One last experiment I would try is to wrap a bare wire around the outside of the RCA where it connects to the y cable and ground that wire to a screw. Now I know that isn't a permanant solution but atleast you would know it is y cable for sure. Maybe then you can fix it right. But here's what you can use if all else fails. http://www.crutchfield.com/p_127SNI1/PA ... ml?tp=2653 Sorry I couldn't help more. Quote Link to post Share on other sites
Eldorado Posted March 18, 2010 Author Report Share Posted March 18, 2010 Update. I prdered the Noise filter recomended by werty7777 and installed it today. Problem solved. Thanks a lot werty! Quote Link to post Share on other sites
werty7777 Posted March 18, 2010 Report Share Posted March 18, 2010 No problem, glad you got it taken care of. Quote Link to post Share on other sites
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