Hiss :(

[REDLINEZ33 10+ year member]

I just got done running new 4AWG power wire and ground to my Alpine MRV-F450 amp..... Before I had 8AWG....

Before i didnt have any hiss. Now i do...... I used exactly the same ground as before, and only difference is the wire (upgraded wire for future upgrades)

Any idea?

It cannot be my HU, because when i unplug the RCAs from my amp I still get a hiss.

its noticable only at low volumes are if the volume is set to 0...

Click to read more...

 

[wilzyx 5,000+ posts]

actually i think that is your headunit if it happens while the rca's are disconnected. i had to actually ground my h/u to a screw behind the dash to fix that problem. the stock grounds on the wiring harness ****. and is your deck a pioneer? you may need to ground the preouts.

 

[REDLINEZ33 10+ year member]

if the RCAs are disconnected from the amp, how is the HU the problem? The amp and HU arent connected then........

 

[davidfre21 5,000+ posts]

amp gets signal from HU

if their is still the hiss when the amp is disconnected from the HU, then it cant be the amp.

leaving up with the HU

got an idea, is the hiss there with the car off? It its only then when the car is running, try reving the engine to see if the hiss sound changes. Might be alt whine //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

 

[REDLINEZ33 10+ year member]

let me re say my setup....

I have my speakers hooked up to my amp. If i disconnect the RCAs i still get the noise....... No way it can be my HU since my HU isnt even attached to my speakers... I think i found the answer. BRB to test it out //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[davidfre21 5,000+ posts]

hmm so where exactly is the noise comin from? do u have a sub out?

 

[REDLINEZ33 10+ year member]

they were never even close to the power cable in the first place //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

I cant figure it out, its not ground (tried 2 different locations), RCAs unplugged still makes noise. I guess it has to be the amp, or something to do with the power. Because it still makes the noise even with the engine off..... (but the car on)..

so im confused

 

[AJ²06 5,000+ posts]

I got hiss too... its a biatch.

 

[REDLINEZ33 10+ year member]

maybe i should shorten my ground? could that cause a hiss? I believe its 6FT atm, that to long?

only thing i can think of

 

[60ndown 10+ year member]

check your tires.

 

[AT@T tech 10+ year member]

maybe you have a snake loose in your ride.

 

[PhatTonyDeMarco 5,000+ posts]

Did you top off your brake light fluid?

 

[REDLINEZ33 10+ year member]

.. ha....?, just because I dont know much about car electronics, doesnt mean i dont know much about cars..... Brake light fluid, lol.................................

..|..

I fixed the hiss from my speakers, but my sub (different amp) still makes a *hiss noise*. Cant figure it out

 

[davidfre21 5,000+ posts]

if i remember right, the ground should be

 

[05AztecRed 10+ year member]

Ground should be as short as you can make it... Main power is to fuse within 18" of the battery.