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bradl79
03-17-2013, 03:46 AM
i have a 4ch amp running component in the fronts and sub in the rears i have them bridged and have proper rms, i can turn the gain all the way down and i still get a hiss in the tweeter and mids, no noise from the bass, i have vol turned all the way down also, i can turn my key to accessory so do not have to have the engine on. could this be a ground issue? i checked all the wires and are solid.

audiobaun
03-17-2013, 04:13 AM
Id try a different Ground location first.

bradl79
03-17-2013, 04:34 AM
they are hooked up to the amp. b/c hiss is coming from all 4 Tweet/Mids, i have the L/R wires running from amp to cross over and from cross to mids and tweets, if there is one loose/bad connection on one wire, could that cause a hiss on all front speakers, Tweets and mids?

calebkhill
03-17-2013, 05:09 AM
What kind of crossover?

bradl79
03-17-2013, 05:30 AM
it came with the JBL GTO608c (http://pacificstereo.com/jbl-gto608c.html?utm_source=google-products&utm_medium=cse&utm_campaign=google-products&gdftrk=gdfV2644_a_7c759_a_7c9104_a_7cGTO608C&gclid=CPP35vuqg7YCFQkEnQod9zEABA)

calebkhill
03-17-2013, 05:47 AM
Try another ground location, a good one.

bradl79
03-18-2013, 02:49 AM
its not the ground, i ran a new ground and made sure it was on clean metal.

audiobaun
03-18-2013, 02:56 AM
its not the ground, i ran a new ground and made sure it was on clean metal.

Depends on the Metal.Not just metal,would be a good ground.A good ground would be to the Chassis/Frame of the Vehicle, not a metal spot to scratch down.Newer5 vehicles from 90 on up mainly are Cheesy Metal /unibody sub frames.Try running a solid ground wire to the body Frame

bradl79
03-18-2013, 03:19 AM
this is what i was grounding to

i removed the black paint off, would this be good enough?

https://lh5.googleusercontent.com/-2CaSvGzwDEY/UUaxahn_08I/AAAAAAAAC6g/09w5CcEhcWE/s797/IMG_20130317_154419_1.jpg

Go2Sleep
03-18-2013, 03:32 AM
That's normal just amplified. Turn the gains down until its not as noticable.

Read my thread and the post near the bottom. A member here did many tests and found that alot of different amps and setups have this same humm sound:
*improving what I have (audison, hertz, Tru)* - Car Audio Classifieds (http://www.caraudioclassifieds.org/forum/general-car-audio-discussion-questions/146825-%2Aimproving-what-i-have-audison-hertz-tru-%2A.html)

bradl79
03-18-2013, 03:47 AM
That's normal just amplified. Turn the gains down until its not as noticable.

Read my thread and the post near the bottom. A member here did many tests and found that alot of different amps and setups have this same humm sound:
*improving what I have (audison, hertz, Tru)* - Car Audio Classifieds (http://www.caraudioclassifieds.org/forum/general-car-audio-discussion-questions/146825-%2Aimproving-what-i-have-audison-hertz-tru-%2A.html)

i already tried that, i turned the gain all the way down and still getting the hiss from the speakers.

calebkhill
03-18-2013, 04:05 AM
When you unplug the RCA cables does it hiss

Go2Sleep
03-18-2013, 04:19 AM
Mine doesn't but that's a good question

calebkhill
03-18-2013, 04:25 AM
Mine doesn't but that's a good question

Yea. May be the head unit ground or something else.

bradl79
03-18-2013, 05:11 AM
I unplug rcas from amp and no hiss. Sub does not all period

calebkhill
03-18-2013, 05:43 AM
Check head unit wiring, especially ground

logan963
03-18-2013, 05:47 AM
i have a 4ch amp running component in the fronts and sub in the rears i have them bridged and have proper rms, i can turn the gain all the way down and i still get a hiss in the tweeter and mids, no noise from the bass, i have vol turned all the way down also, i can turn my key to accessory so do not have to have the engine on. could this be a ground issue? i checked all the wires and are solid.

Do you have a pioneer hu? they tend to hiss if you don't ground to frame

calebkhill
03-18-2013, 05:51 AM
Do you have a pioneer hu? they tend to hiss if you don't ground to frame

Yea. If wiring is good after checking and still hissing, ground to frame.

bradl79
03-18-2013, 12:20 PM
No its stock hu i am going to just try to rewire everything. I had best buy install the amp and then i installed a sub and components. I went back to best buy and they said they cant work on it be it has been modified. I dont think it was hissing until i installed the components, tweeters, and crossovers that came with the comps.

bradl79
03-20-2013, 09:53 PM
Doea anyone know how to run their own speaker wire on a kia forte 2012. The boot is just one big harness so i dont know how to run it to the door.

bradl79
03-23-2013, 06:47 PM
I had re-ran new 16 gauge from and directly to cross over than from cross over to mid and tweets so I am not connect to any stock wires and I still get feedback. I changed the ground also. Does this mean it would be the RCA's?